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Editor's Summary
Museum objects are being presented in a new and informative light through reflectance transformation imaging (RTI). This photographic method provides detailed images of an objects shape, color attributes and surface texture along with illumination from different angles, showing details that are often unavailable with the naked eye. Beyond revealing brushstroke details and surface impressions, the RTI technique can be used under a microscope and enhanced with infrared or ultraviolet light, broadening its utility for museum professionals, archaeologists and historians. Associated software records the series of images as a digital lab notebook. RTI is part of the emerging field of computational photography, extracting data from a sequence of digital photographs and synthesizing a new representation holding previously unrecognized information, while protecting the original resource. The digital representations of fine art and natural science museum objects afforded by this new technology facilitate cooperation among museum professionals across disciplines and around the world.
museum informatics
digitized images
image analysis
physical attributes
Bulletin Issues
Current Issue
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Bulletin, February/March 2012
Advanced Imaging Tools for Museum and Library Conservation and Research
by Carla Schroer
Reflectance transformation imaging (RTI) is a photographic method that captures a subjects surface shape as well as the color. This enhancement allows special viewing software to dynamically relight the subject from any direction and enhance and transform both the surface shape and color attributes. The technology is being adopted in the museum and library context primarily for conservation and research.
Figure 1. Three views from the same RTI of a small bronze sculpture of the goddess Tutela. RTI allows objects to be dynamically relit using special viewer software. The light source is illuminating the object from the left, from above and from the right. Canton of Valais, Switzerland, Archaeological collection.
The implications of this ability are more far-reaching than we might think. Enhancing the surface shape can reveal information about an object that we cannot see even with the most careful direct observation.
Furthermore, RTI imaging allows for preservation of the digital representations of art and artifacts in a much more comprehensive way than has been available until now. The technology is being developed with strict attention to the requirements of digital documentation and accountability, as discussed below. A comprehensive digital record allows museum and library conservation labs to continue studying an object without danger of degradation to the original and with the potential for wide access to one another's work.
RTI can be, and has been, applied in a great variety of fields and disciplines. It is generating enthusiastic support in both fine art and natural science museum circles and in the scientific communities. The technology is relatively easy to learn, it can be performed with inexpensive off-the-shelf equipment and all software is free, much of it open-source.
Example: Lovis Corinth Painting from the Worcester Art Museum
Lovis Corinth (1859-1925) was a German artist whose style is characterized by vigorous brushwork and whose work is often grouped among German impressionists and expressionists. His work was posthumously declared decadent by the Nazis, and much of it was burned. A painting of his daughter, Wilhelmine with Braids, came to the United States in the custody of his daughter, but was damaged by an apartment fire decades later. The fire-damaged painting was donated to the Worcester Art Museum by Wilhelmines children in hope that it could be restored. In addition to smoke residue and degradation of the varnish layer (which was removed as part of the conservation treatment), the heat of the fire caused blistering in the pronounced impasto of the paint surface. As part of their ongoing treatment efforts conservators at the Worcester Art Museum sought a way to study and document the surface damage.
In 2006 Philip Klausmeyer, scientist and associate paintings conservator, approached Cultural Heritage Imaging to see if RTI might help. Cultural Heritage Imaging is a non-profit corporation that develops and implements new imaging technologies for cultural, historic and artistic heritage and scientific research. A team from CHI traveled to the museum and shot some test images. The resulting RTI showed remarkable surface detail, even tiny blisters on top of blisters within the brushstrokes.
Figure 2. Details of blistering on paint surface caused by heat damage from a fire. Left callout shows the detail area of the RTI viewed in normal light; right callout shows the shape and reflectance information. Lovis Corinth, Wilhelmine with Braids. Worcester Art Museum, Gift of Wilhelmine Corinth Klopfer, at the request of her children (2005.202).
The conservation team immediately grasped the potential for RTI in conservation documentation, planning, condition monitoring and research and has since funded and carried out a larger project to bring RTI capability to the lab.
How RTI Works
RTI images are created from information derived from multiple digital photographs of a subject shot from a stationary camera position. In each photograph, light is projected from a different known, or knowable, direction. This process produces a series of images of the same subject with varying highlights and shadows. Lighting information from the images is synthesized to generate a mathematical model of the surface, enabling a user to re-light the RTI image interactively and examine its surface using viewing software.
Each RTI resembles a single, two-dimensional (2D) photographic image. Unlike a typical photograph, reflectance information is derived from the three-dimensional (3D) shape of the image subject and encoded in the image per pixel so that the synthesized RTI image knows how light will reflect off the subject. When the RTI is opened in RTI viewing software [1] each constituent pixel is able to reflect the software's interactive virtual light from any position selected by the user. This changing interplay of light and shadow in the image discloses fine details of the subject's 3D surface form.
RTI was invented by Tom Malzbender at Hewlett Packard Labs. A landmark paper describing the first tools and methods within the RTI technology family, named polynomial texture mapping (PTM), was published in 2001 [2].
How RTI Data Is Captured
The original method for capturing RTI data (that is, capturing a sequence of images using different lighting positions) required the use of specialized light arrays (also called domes). In 2006 the team at CHI and Tom Malzbender invented the highlight method for capturing RTI data, sometimes referred to as HRTI. Placing reflective spheres in view of the camera creates a highlight on the sphere, such as a ball bearing, that open-source processing software called RTIBuilder uses to determine the light position for that image.
Figure 3. A typical highlight RTI setup with camera facing down to shoot an object on the floor. The camera is connected to a laptop computer. A radio trigger on the camera fires the flash when the camera is triggered. A string is used to keep an equal distance for the light from each position.
Figure 4. Highlight on a reflective sphere placed in the scene of an image sequence. The person holding the string is measuring the distance for the light during set up.
This innovative use of reflective spheres allowed for the widespread adoption of RTI at a very low cost. It also allowed RTI to be easily applied to a wide range of materials and material sizes ranging from microscopic to a square meter or more. A user guide with step-by-step instructions for capturing RTI data, along with an instructional video, are available for download on the Cultural Heritage Imaging website [3].
RTI light arrays are still widely used because they are more efficient for capturing and processing RTI data for large collections of smaller material. Most light arrays are custom made and can be quite expensive. The size and cost also increase with the ability to image larger objects.
The RTI technique is very flexible; it can be applied under a microscope and can also be performed using wavelengths outside of the visible spectrum. A microscopy example is included in the subsection, Makers Marks and Stamps, below. To apply the technique in the infrared (IR) or ultraviolet (UV) bands, we use a camera that can take IR or UV images, along with a light source that produces IR or UV light in the desired bandwidth. We then follow the same process of RTI capture as with visible light. Infrared bandwidths have been used to disclose hidden surface features below the outer surface of paintings.
Scientific Accountability
For centuries scientists have recorded their experiences and subsequent analysis that described the evidence and results of their inquiries, which then became an integral element of their published results. Scientific information cannot be understood in the absence of the meaning of the data and the history of its generation.
In order to ensure that digital representations of objects are reliable sources for study and research, the CHI RTI software keeps a record of all the process steps applied to the set of images when producing the RTI. We refer to this process history as a digital lab notebook (http://culturalheritageimaging.org/Technologies/Digital_Lab_Notebook/), and it serves the same function as a scientists written lab notebook. In its simplest form the digital lab notebook contains the record of the means used to digitally capture information about our world and the history of events describing this informations subsequent processing until it reaches its final state as a completed digital representation.
The digital lab notebook is key to successfully implementing many of the guiding principles of technologies we develop. It provides the means to evaluate a digital surrogates scientific reliability and suitability for reuse for both users and conservators or archivists. Among the benefits of a digital lab notebook:
- A user can determine how images were captured and processed to produce the representation and whether that same image data can be reused with newly developed or updated techniques. For example, newly developed algorithms have been shown to produce more detailed results for certain kinds of materials without reshooting the photographic image sequence, protecting the object from additional handling.
- The digital lab notebook enhances the long-term preservation chances of digital representations by making capture and processing histories transparent, thus helping the digital archivist maintain the data over time. Our approach of creating detailed records of image processing and using open file formats and open-source software help RTI adopters meet the Library of Congresss sustainability factors for digital preservation (www.digitalpreservation.gov/formats/sustain/sustain.shtml).
Fostering Adoption
To foster adoption of RTI technology, CHI has developed do-it-yourself materials and software user guides, as well as a hands-on training program. The training program ensures that people learn the RTI methods in detail for a variety of objects and situations, as well as how to deploy RTI in their institutions or in the field.
CHI currently has an Institute of Museum and Library Services (IMLS) 21st Century Museum Professionals grant to deliver four-day RTI training workshops at each of the six graduate programs in art conservation in North America and four U.S. regional museum sites. Over 150 museum professionals and pre-professionals will be trained during this grant period. We have completed six of the 10 workshops, including sessions at the Institute of Fine Arts at New York University, San Francisco Museum of Modern Art and the Straus Center for Conservation and Technical Studies at the Harvard Art Museums. The remaining workshops will take place in 2012.
Apart from the above grant, an additional 70 museum professionals, archaeologists and historians have completed the four-day training, and more than 150 people have attended CHI-led workshops ranging from half-day to two-day sessions that introduce RTI, how it works and how it is done. Many training participants spread their RTI knowledge within their institutions as part of adopting the technology.
With the introduction of RTI, I believe conservators have acquired an important new tool with which to document artistic and historic heritage. As we integrate it into customary conservation practice, I believe its value will become even more apparent as we find new uses and applications for this tool.
-Rita Albertson, Chief Conservator
Worcester Art Museum
Letter to IMLS in support of RTI training program
RTI is being applied to many materials to reveal fine surface details often not visible with the naked eye. This has proved to be a valuable tool in a variety of fields and disciplines. Among the materials and types of details revealed are the following:
brushstroke details in paintings on wood and on canvas
condition of paper and impressions made from marks and other surface details in drawings
scratches on plates and chemical depositions of images on plates in daguerreotypes
shape of vellum and state of ink flaking from characters in illuminated manuscripts (http://vimeo.com/30213656)
tool marks on furniture
tool marks on stone
subtle surface details including fine scratches from wear on coins, which effectively fingerprint objects [4]
details that help scholars decipher previously unread inscriptions (www.hpl.hp.com/research/ptm/antikythera_mechanism)
details that help determine line order for petroglyphs and decipher worn areas of rock art (http://culturalheritageimaging.org/What_We_Do/Fields/rock_art/)
Microscopy Example: Makers Marks and Stamps
A four-day RTI training took place at the Straus Center for Conservation and Technical Studies of the Harvard Art Museums in May of 2011. One area of interest was researching makers marks on gold and silver objects, so examples were imaged under a microscope. A tiny ball bearing was placed on the object (Figure 5) and a flash was used to illuminate the object. The results showed fine details of the monogrammatic stamp on the back of a gilt bronze plaquette (Figure 6).
Figure 5. Microscope setup at the Straus Center for Conservation and Technical Studies of the Harvard Art Museums. Tiny spheres are placed near the small stamp, which will be imaged under the microscope.
Figure 6. RTI digital representation of the small monogrammatic stamp of the Florentine connoisseur and art dealer Stefano Bardini (1836-1922) located on the back of a gilt bronze plaquette representing Valerio Bellis (Vicenza, 1468-1546) Adoration of the Shepherds (Harvard Art Museums, Fogg Museum). The bottom portion of the figure shows the plaquette under normal light, and the upper portion shows the enhanced reflectance revealing the surface shape.
New Research and New Directions
RTI is part of a family of technologies in the new and emerging field of computational photography. Computational photography is based on the computational extraction of relevant information from a sequence of digital photographs. This information is then synthesized into a new digital representation, which conveys information about the subject material that is not found in the individual source photographs (http://culturalheritageimaging.org/Technologies/Overview/).
A new technology, algorithmic rendering (AR), which uses the same datasets as RTI, is being developed by Princeton University and Cultural Heritage Imaging supported by a grant from the National Science Foundation (http://culturalheritageimaging.org/Technologies/Algorithmic_Rendering/). The result of this grant project will be an open-source tool that will extract and merge visual information available only under certain lighting conditions, certain wavelengths or certain imaging modalities. Users will be able to generate high quality, comprehensible illustrations for documentation, scientific study and sharing with colleagues, collection visitors and the public.
RTI imaging is a promising new technology that opens up exciting avenues of research in arts and sciences. The techniques for creating RTI images are easy to learn and inexpensive to implement. The digital lab notebook that is built into the workflow provides reliable documentation and allows the data to be easily shared and used in an ever-expanding range of applications.
In addition to protecting the original resources, digital representations facilitate international and interdisciplinary cooperation among fine art and natural science museum professionals and within the scientific communities.
Resources Mentioned in the Article
1. RTIViewer (open-source software): http://culturalheritageimaging.org/What_We_Offer/Downloads/rtiviewer/ Note: Additional software for viewing RTIs is available from other sources.
2. Malzbender, T., Gelb, D., & Wolters, H. (2001). Polynomial texture maps. In Computer Graphics: SIGGRAPH 01: The 28th International Conference on Computer Graphics and Interactive Techniques [pp. 519-428]. New York: ACM. Retrieved December 31, 2011, from www.Hpl.hp.com/personal/Tom_Malzbender/papers/PTM.pdf
3. Schroer, C., Bogart, J., Mudge, B., & Lum, M. (2009). Guide to highlight image capture. Cultural Heritage Imaging. Retrieved December 31, 2011, from http://culturalheritageimaging.org/What_We_Offer/Downloads/#capture
4. Mudge, M., Voutaz, J.-P., Schroer, C., & Lum, M. (2005). Reflection transformation imaging and virtual representations of coins from the Hospice of the Grand St. Bernard. Proceedings of 6th International Symposium on Virtual Reality, Archaeology and Cultural Heritage (VAST2005) [pp. 29-39]. Eurographics Association. Retrieved December 31, 2011, from http://culturalheritageimaging.org/What_We_Do/Publications/vast2005/index.html
Carla Schroer, co-founder and director of Cultural Heritage Imaging (CHI), leads the training programs at CHI, and works on field capture projects with reflectance transformation imaging and related computational photography techniques. Carla also directs the software development and testing activities at CHI. She spent 20 years in the commercial software industry and has extensive experience in software licensing and open-source projects in both the commercial and non-profit sectors. She can be reached at Carla<at>c-h-i.org.
Articles in this Issue
Preservation: The Final Frontier
How to Identify Ducks in Flight: A Crowdsourcing Approach to Biodiversity Research and Conservation
Museum Informatics: Something New, Something More: Introduction
CollectionSpace: A Story of Open-Source Software Development and User-Centered Design
Unintended Consequences: Unlimited Access, Invisible Work and the Future of the Information Profession in Cultural Heritage Organizations
A Haystack Full of Needles: Scholarly Access Challenges in Museum Video Archives
Advanced Imaging Tools for Museum and Library Conservation and Research
OpenART: Open Metadata for Art Research at the Tate
The Future of Museum Scholarly Catalogues
Teens, Virtual Environments and Information Literacy
Computer Refurbishing: Environmentally Reducing the Digital Divide
IA Column: What Happens When Context Thwarts an Information Architect's Vision?


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Over the last year using Blender I've found some really useful shortcuts and features. so I though I would compile a short list of some of the most useful ones that I use almost everyday. This article is geared towards beginners but more experienced users could find they missed a few of these. Enjoy!
1. Hover Copy/Paste
This one is the best of them all, if you read any of this read this! If you hover over a value or color and press CTRL C it will copy the value! No need to click on it and select it, just hover!
2. Random Node
The random node is an output from the "Object Info' node found under the "Input" folder. The random node has unlimited possibilities. In the example I linked the random output to a color ramp node with 3 colors, then plugged that into an emission shader. And as you can see it randomly selects one of the colors for each object.

subset: commoncrawl


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I've been using Windows 8 for months now -- ever since the first preview version. Now that the final version is here, what's the verdict?
Simply put, this operating system is smokin' hot! The boot times are a fraction of Windows 7 and earlier -- even on underpowered legacy equipment such as my ASUS Eee PC T101MT touch netbook. In truth, I've never seen a netbook with only 2 GB of RAM move so fast through a cold boot. It's perhaps the best Windows kernel to date. Microsoft got this part right and I'm very impressed.
Microsoft got indexing right, too. In Windows 7, searching for files and programs was easy. All you had to do was hit the Start Button and then start typing. With Windows 8, it's pretty much the same thing, except it's even faster. You still have to wait for Windows 8's Live Tiles to appear before you start typing, but once you're there, finding what you're looking for is fast and easy.
Upgrading Legacy PCs To Windows 8
BYTE's George Ou offered a good description of the bundled Windows 8 apps: Half baked. On a legacy PC -- even a gaming machine with 3D graphics and a ton of RAM and processing power -- the Windows 8 apps literally fall flat. The apps are two dimensional; all that legacy power is wasted on Windows 8's Modern UI, and it's a shame. The interface is fast but still very clunky. Windows 8 is optimized for touch, not a mouse. So, tablet, yes; desktop, not really.
Modern UI, Or Classic?
Microsoft's Steven Sinofsky called the release of Windows 8 the start of the touch PC era. In truth, the Modern UI will be difficult for some people to get used to. The removal of the Start Button is going to force a change in work habits that hurts some users' productivity.
Live Tiles work well on tablets and even smartphone. I'm actually quite impressed with how the interface works, but I don't see this working well on a traditional PC. In my opinion, the Windows 8 apps, the new UI and the classic desktop just do not fit together. Swapping back and forth between the new UI and the classic interface is jarring at times, especially if you've spent any appreciable amount of time in one or the other during any given computing session.
In fairness, there are a few tricks which, once you learn them, make Windows 8 a lot easier to use on a conventional PC. For instance, putting the mouse cursor in the upper-right corner displays a group of icons for functions such as settings for the PC. The only way to learn these tricks is by accident, but once you do know them, everything else gets easier.


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Welcome .... at home
This site will help you to book your stay in our self catering apartments in Venice. Situated just few minutes from St. Marco Square, you will have all services at a cheap price. We are a typical venetian family and we can suggest you where to do shopping, the highlights of Venice, museums, exhibitions, and concerts that you should see. We know many restaurants where you can taste typical food at a good price. We pay attention to the family, couples and small groups requirements. Your stay in Venice will be unforgettable.
The apartment is located in the district of Castello, close to the famous Biennale, an international art exhibition.
Castello was one of the first areas to be inhabited, and still conserves to this day many characteristic features of the original ways of "living together", less visited by tourists albeit full of restaurants, baccari, cafes, supermarkets and souvenir shops.
The apartment is located at a 2 minute walk from the ferry boat "Giardini",and a few steps from Via Garibaldi and Riva dei Sette Martiri, which offers a particularly impressive view, especially at sunset, of San Marco, San Giorgio Maggiore's Island, Salute Church and the island of Lido.
We returned after 2 years to an appartment of mister Gianni Rossi; nicely situated, and WITH A GARDEN! The appartements are all well equipped and we loved to shop and eat in the nearby big street with many Italian families on the terraces.
We will return!
Sunny and peaceful studio apartment for vacation rentals in Venice, fully renovated in 2008 and located on the ground floor (with private entrance) of a stately building in the district of Castello and in a unique context, as it is surrounded by a private garden of 1000 sq. mt. and is one of 4 apartments available for rent in this building
This charming open space style apartment of about 35 sq. Has been recently restored and is characterised by a wooden beamed ceiling. The apartment offers a bright living area with a comfortable couch, a table for 2, a fully equipped kitchen corner , complete with all necessities, including a microwave oven, a coffee machine and a washing machine, a sleeping corner with two single beds , and a bathroom with shower. The apartment is wonderfully sunny and bright and overlooks a splendid garden of 1000 mt., (unique and unusual in Venice), complete with a furnished patio with a table and chairs, ideal for eating outside or simply relaxing in the privacy of one's own garden. This property is part of a complex of 4 apartments for rent, which can accommodate up to 10 guests in total, and is therefore ideal for large families or groups of friends who wish to spend un unforgettable holiday in peace immersed in the green.
Leave your comment on our Guestboock ... View all ...
Events in Venice :


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nd0606 wrote:what's the site?
ForceBlog wrote:I'll probably just settle for watching/blogging from home for this one. Maybe next year I'll try to shoot for being there for State and doing the Quarterfinal games but we'll see when the time comes. The blog is still very new as I started it late September. It keeps me from being bored so that is nice. Looking forward to talking hockey with whoever wants to join in on Friday night.
So there will be a live blog available on Friday night for both semi-final games...if any of you follow the Force, there will also be a separate live blog for that game in Waterloo as well. Thanks for your support
Again the link for that live blog will be at http://www.FargoForceBlog.com
ForceBlog wrote:Hopefully I'll be able to do it next year. I really didn't even think about doing any of it until recently.
Users browsing this forum: No registered users and 1 guest


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By Russ Britt
Shares of Cytokinetics Inc. lost more than half their value in early trading Friday after the biotech company said it failed to reach its primary goals for a new drug it was testing to treat Lou Gehrig's disease.
Cytokinetics /quotes/zigman/18621233/delayed /quotes/nls/cytk CYTK plunged by more than 60% to $5.11 in recent trades after the release of the results. The company said its drug, Tirasemtiv, did not offer a meaningful change from placebos in primary tests during the Phase 2 program.
The company considers Tirasemtiv to be a "novel" skeletal muscle activator even though it did not prove effective in tests to treat the disease, formally known as amyotrophic lateral sclerosis. The disease usually is fatal due to respiratory failure that occurs when skeletal muscles that help with breathing begin to deteriorate.
Cytokinetics still is testing a cardiac muscle program in conjunction with Amgen Inc. /quotes/zigman/19815/delayed /quotes/nls/amgn AMGN
Follow Russ Britt @russbrittmktw.
Follow Health Exchange @MWHealthBlog.
More health-care news from MarketWatch:
Troubled Oregon health plan may be turned over to feds
For Zimmer investors, "bigger is better" on Biomet deal
What Obamacare problems? Aetna beats earnings views despite reform


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Your Name in Elements (or Not)
Beautiful Custom-Printed Element Banners
Special holliday shipping note: Order by Saturday, Dec 20th for delivery in time for x-mas (except PhotoGlows)! Ignore the 2-3 week shipping notes below, we will do a special last-minute run of everything ordered by the 20th. PhotoGlow banners must be ordered by Dec 15th for x-mas delivery and PhotoGlows over 48" wide cannot be delivered in time.
Enter any string of letters and spaces below to see if it can be written in terms of chemical element abbreviations. Try your name, or the names of friends! Since only certain one-and two-letter combinations exist as element abbreviations, only some words and phrases can be written in elements. Some words can be written in more than one way: Scroll down to see all possible combinations that work for your word or words. (You can use spaces, but no punctuation.)
If you're lucky with your word, name, or phrase, you can order it as a high-quality photographic banner custom-printed with an archival pigment ink printer on heavy-weight satin finish paper. The prices may seem high compared to mass-produced posters, but keep in mind that each one of these is unique and made to order, not only the printing but the design itself. And the printing is higher quality than possible with any mass-produced, offset-printed poster: These are fine-art prints with detail and color vibrancy that cannot be captured in a screen image.
NEW! Now available, PhotoGlow luminous banners! For the ultimate custom element banner, PhotoGlow luminous prints cannot be beat, period. See
this description of my PhotoGlow periodic table
for more details. They are not cheap, but you will really be amazed at the impact.
If you can't find a way to spell what you want, you can always order a copy of my
Photographic Periodic Table Poster
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(Use only the letters a-z and space.)
Choose the style of images to use:
Poster Images
Poster Images with Large Symbols
Create linkable page for this spelling
Sizes and prices are based on this specific sequence. Because these banners are custom-printed to order, please allow 2-3 weeks for delivery. Widths are approximate.
16x34 (2-line)
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12x33 PhotoGlow (2-line)


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FileMaker 12 Makes Portable Databases Easier
I've long been a fan of the FileMaker database, as it's probably the simplest database to work with that also has the power to do complex work. FileMaker is owned by Apple, but the database works on both Mac and Windows. It's often my first suggestion to consumers and small businesses that need a real database.
The latest version, FileMaker Pro 12, adds a number of new features. What stands out to me, though, is how much better it works for taking your database with you on an iPhone or iPad. The previous version started this trend, but the new version just works better.
The key to this is a number of new themes that are really designed for the touch interface. You can start with one of these themes and create a new database, or take an existing database and apply the new theme. (In practice, I found it often took a bit of modification to make everything look quite right on screen, but wasn't difficult.) In total, the product has 40 themes, and 16 starter solutions designed to help a new business customer.
Once your database is created, you then download the free mobile app, known as FileMaker Go, for either iPhone or iPad. You can use the file sharing feature in iTunes to move the database to your device. Alternatively, you can email the database (assuming your database is small enough to email conveniently), or you can connect to databases on a FileMaker server. You can now import and merge data from mobile devices with the primary database.
Other new features in FileMaker Pro 12 include ad-hoc charting, which makes it easier to create charts for your reports; a number of new chart styles; and the ability to include audio and video within container fields in the database.
Combined with the new version of FileMaker Go, you can now record audio and video, add files to the database on the remote device, and support things such as location information. This would be useful if you wanted to build an application that recorded delivery of products, for instance.
The base version of FileMaker Pro 12 sells for $299 (upgrades are $179), while FileMaker Pro 12 Advanced, with more sophisticated development tools (such as a script debugger and the ability to add custom menus and functions) sells for $499. Both versions support up to nine users. Unless you're a programmer, most small businesses will be fine with the base version.
If you need to support more users, there's a server version. That's also been upgraded with a number of new features, including 64-bit support, better remote management, and content streaming features. A server version that supports up to 250 users is $999, and a more expensive unlimited version is also available.
It's true that other database programs might be simpler. Just keeping a database in a spreadsheet such as Microsoft Excel or Apple's Numbers, for instance, is easy until you get a lot of records and want to do complex sorts or lookups. FileMaker's own Bento (for Mac and iPad only) is a real database that's much simpler and less expensive, but it lacks programmability, reporting, and relational features. For people who want to do more complex programming, Microsoft Access and Alpha Five remain very credible alternatives.
It would be more flexible if FileMaker Go also had an Android version, but for organizations that need to take data with them on an iPhone or iPad, nothing is easier than the combination of FileMaker Pro and FileMaker Go. For anyone who just wants to build a simple database application, I continue to like the way FileMaker Pro makes the basics easy and then builds on that.
For more, read PCMag's full review.


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Hello everyone,
I am experiencing some issues with my external hard drive. I've decided to encrypt it using bitlocker. We're talking about a 2TB hard drive. The process started..it requested for a password and i have been provided with a recovery key. At around 90% the
process blocked/stoped. It started to affect my PC performace.
Suddenly, there was no longer a progress bar so that i could see how much i had to wait. I've been requested to provide directly my recovery key( not the password) so that i could unlock the drive . I kindda panicked..and reinstalled the OS.
The sad part, altough i have the original message that i got from the drive when i started to encrypt it with the full recovery key, it says its incorrect.
I've performed several test using CMD and all the avaiable commands i could find on the internet, but with no luck.
Have you managed to to get by from such a scenario?
Rudolf Radovici
I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.
I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.
You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)
After rebooting one of our test machines, bitlocker wanted the recovery key.
There were no hardware modifications on that machine.
Error message in event log:
Bootmgr failed to obtain the bitlocker volume master key from the TPM because the PCRs did not match
Event id 24635, source bitlocker-driver
Each time the machine starts, the recovery key is needed.
Any idea how to solve that issue and why it happens?
Second partition was created manually on that machine. So that's clear that bitlocker reacts...
But now: how can I confirm those changes so that the recovery key is not needed each time we boot?
I would like to confirm if BitLocker accepts the recovery key?
Please update the BIOS to improve the stability for TPM first.
I also would like to suggest you disable and enable BitLocker again to reset the settings.
For more information, please refer to the following link:
Arthur Li
TechNet Subscriber Support
in forum
If you have any feedback on our support, please contact
[email protected]
Please remember to click ?Mark as Answer? on the post that helps you, and to click ?Unmark as Answer? if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
Hello and good afternoon, I have a issue where a manager started the Bitlocker process on the SD card in his Surface Pro 3
with Windows 8.1. The Bitlocker attempt failed at 3.4% completed but the SD card ended up being Bitlocked without providing the Bitlocker Recovery Key (I've never seen this happen before). He doesn't know the password for the SD card and of course
I've been tasked to somehow release the encryption so that he can get the required information off of the SD card.
Is there anything that can be done to release the encryption on the SD card or has the SD card been made non-accessible moving forward?
My BitLocker password is not working after format my c drive. instead i have my recovery that is also not working.
Please somebody help me to unlock my disk.
I've had windows 7 64bit installed on my PC and I converted one drive to bitlocker drive, it was working fine
and today after windows went crashing I've freshly installed windows7 64 bit enterprise
but I cannot find my bitlocker drive
it appears on the disk management as unallocated!!
any ideas?
Where/wheir do you get your copy of Windows 7 Enterprise and what method did you use to install it?
Have you consulted your IT Department?
I know a BIOS update on my Latitude with Windows 8 and Bitlocker activated on the O/S drive triggers Bit locker recovery on startup. I don't have the recovery key and so am stuck. How to recover without the Bit Locker recovery key?
The solution I found was to install the previous version of the BIOS, but without being able to boot into Windows, I needed to install the previous version of the BIOS in DOS. Some server products provide a F12 boot up menu option to roll back a BIOS update, but this is not available in my Latitude.
I downloaded the correct BIOS version (the additional info section made specific reference to it being installable from Windows or DOS). I prepared a bootable USB key (to a dos prompt) and copied the bios installer executable to the memory stick.
Because secure boot (UEFI) is enabled, it is not possible to boot up from USB key, so legacy boot mode needs to be enabled. There were 3 settings that required changing in the BIOS before I was able to boot from the USB key.
Once I was able to boot into DOS from the USB key and got to the DOS prompt, I ran the BIOS update exe. The laptop rebooted, installed the previous BIOS version and then rebooted again. I pressed F2 to get into the BIOS and changed back the settings as they were (secure boot UEFI). I then managed to boot into windows without being prompted for the Bit locker recovery key.
You able to export or view the Bitlocker recovery key by going to Control Panel -> Security -> Bit locker Management, and temporarily suspend protection (until the next reboot). It is possible to run a commandlet to specify the number of reboots bit locker should be suspended for.
You may find that installing the previous version of the ... Read more
hello, i use Bitlocker Drive Encryption to lock one partion from two. Everything goes corectly, but after i change my MotherBoard of mai Dell Inspiron Laptop and i put my password, doesn.t work. Bitlocker said isn.t the right password. Im sure about my password.it is true. My warranty changed just my Motherboard and they don.t change nothing in my Hard Drive. I didn.t reinstall my windows. Why Bitlocker Drive doesn.t recognize my password? Please , i need help
Your harddrive doesn't only have a bitlocker password but bitlocker is also communicating with TPM chip on mainbord. And the mainboard has been swapped so you hav a new TPM chip with other secret key.
Trusted Platform Module - Wikipedia, the free encyclopedia
Didn't they check to see if it was bitlocker protected?
Do you have a backup? I assume you make backups prior to send your machine away
Dear around 3 years back I encrypted one of my laptop drive and couldn't remember the password or find the recovery key. But I have the recovery key identification. Is there any possibility that using my recovery key identification I can get the full recovery
p.s. I am still using the same laptop.
BitLocker Recovery Keys don't work, they r for wrong Identifier. I have a "recovery code" but how in the world do you use a recovery code to get a new recovery key?More replies
Hi ashish,
The drive must be unlocked by the recovery password or recovery key. But you lost it and haven?t print the recovery information or save it anywhere. No any other method to help you.
I am sorry for that. I suggest you consult professional data recovery company.
Best regards,
Karen Hu
When I boot up my laptop I am asked to enter the bitlocker recovery key. I do not have this, I don't even recall setting it up. How do I solve this issue. I am willing to completely reinstall windows. I can't get in any further than this screen. Any help would be greatly appreciated
Did you visit http://windows.microsoft.com/recoverykeyfaq as it suggests on the screen?1 more replies
When I boot up my laptop I am asked to enter the bitlocker recovery key. I do not have this, I don't even recall setting it up. How do I solve this issue. I am willing to completely reinstall windows. I can't get in any further than this screen. Any help would be greatly appreciated
Did you visit http://windows.microsoft.com/recoverykeyfaq as it suggests on the screen?4 more replies
Secure boot disable
Dell Tablet:
I have keyID to obtain the Bitlocker key
I have the bitlocker recovery key ID, I just don't know what to do with it. Does anyone have a clue what I'm supposed to do with it?More replies
I started up my unit to be confronted with a message to provide a BitLocker recovery key, I do not have one and never set this up.I have tried following the instructions to do a system reset but it doesn't work and reverts to the Choose an Option screen.I have product key ID etcHelp!!!
BitLocker can not be inadvertently turned on. Someone who has access to your notebook has encrypted the drive with Bitlocker technology. Unless you have the password, you do have a severe problem. Unencrypting the hard disk will be very expensive, that is, if it can be done.http://www.lostpassword.com/hdd-decryption.htm There are companies that claim to be able to do it, but there is unlikely to be a guarantee that it will work. https://www.google.nl/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=how+to+remove+bitlocker+...1 more replies
I need my bitlocker recovery key for my DESKTOP UF656V and I can't find it, could this be sent to me please so I can unlock the computer
The point of drive encryption is to kept unauthorized people out of the computer. HERE IS A MICROSOFT document about the subject. Be sure to read the "I don't have a key. What else can I do?"1 more replies
When I reset Spectre x2, it asks me Bitlocker recovery key. I don't have the key. What can I do?
Hello @pcsl, Welcome back to the HP Support forum. Thank you for your post. BitLocker is a Microsoft software designed to protect your PC against offline attacks, unauthorized access typically if your PC gets stolen. BitLocker is full disk encryption software. More info:>> https://en.wikipedia.org/wiki/BitLocker>> http://www.windowscentral.com/how-use-bitlocker-encryption-windows-10 BitLocker was activated by someone and during the activation time it prompts the user to save/store the key in a safe place. If this is company owned asset/PC, you should turn to your company's IT support guys and they should be able to provide you with the recovery key. If this is your own device, most probably you use a slightly different BitLocker version for certain PCs and tablets known as Device encryption. Probably your key is stored in Microsoft OneDrive with your Microsoft account here :>> https://onedrive.live.com/recoverykey More info>> https://arstechnica.com/information-technology/2015/12/microsoft-may-have-your-encryption-key-heres-...>> http://windowsitpro.com/microsoft-surface/locating-your-microsoft-surface-bitlocker-recovery-key>> http://www.eightforums.com/tutorials/21433-bitlocker-recovery-unlock-drive-windows-8-a.html Please, note that it is very important for security reasons that you keep the encryption key (Bitlocker key) in a secure place so that only you know it. Let me know if this works for you ... Read more1 more replies
Dear all my friends, I lost my bitlocker password and I can't find my recovery keys for my bitlocker's drive.
my bitlocker id is 92DC5B7D.
Please help me.
my bitlocker recovery key ID 3E51A412 can i get the key for IDMore replies
Excuse me if I posted this in the wrong forum. but here is my issue.
We have bitlocker set up and every time we restart the computers, we are asked for the recovery key. Now we have the recovery key and get into windows fine. but how do we stop this from happening everytime we start the computer. We have suspended bitlocker then restarted. and restarted again to see if the situation corrects itself. Of course it does not. Does anyone have any ideas on what I could do. Oh and it is on a domain.
Thanks for all the help and future suggestions.
Turn off the Bitlocker this should resolve the issue.0 more replies
Dear Team,
I am using Dell Latitude E5250 laptop with pre installed Window 7 professional SP1 by Dell team. Today i have come through technical problem and received the message about bitlocker recovery key when i started my Laptop.
message display is as follows
"Windows Bitlocker Drive Encryption Recovery Key Entry
Enter the recovery key for this drive
---------- ------------ ---------------- -------------
---------- ------------ ---------------- -------------
Drive Label: SINLT 493C152 OS 8/19/2015
Recovery Key ID: D9EA32CB-FEB8-447D-BFDD-D7988E256826
Use the function keys F1-F9 for digit 1-9 and use F10 for 0
Use the TAB, Shift +TAB
Basically system is asking for Bitlocker recovery key. I am unable to access my system. please help me in resolving this issues as local Dell support unable
to support.
Best regards,
Atul Patil
+91 9967946655
I have a new Windows 8.1 machine and I wish to encrypt the drive using Bitlocker. It gives me 4 options to save a recovery key
1. Save to your Microsoft account
2. Save to a USB flash drive
3. Save to a file
4. Print the recovery key
Option 1 isn't available as I'm logged on using a local account.
i. What is the difference between options 2 & 3? i.e. I could save to a file on a USB drive
ii. Does option 2 mean the USB flash drive cannot then be used for other purposes?
iii. Does option 2 also mean I could use a USB external hard drive, or does it have to be a flash drive?
iv. Once the recovery key has been created, can the key then be copied to other locations or is it only going to work where Bitlocker puts the key?
v. Just thinking about printing the recovery key - can this be used without a password to access the drive, how sensitive/important is the printed key?
N00b questions, I'd very much appreciate your answers.
hello and welcome to eight forms , my opinion , difference between 2 and 3 ,2 will create a file and put it on the flash drive for yah,3 you will have to move the file it creates to a flash drive of external drive manually 'I would think you could take the file it create and put it where ever you want , I don't use bitlocker ,if I did I would print it and put away for safe keeping ,like I try to do will all passwords .and if the drive is pass worded that you store the file on ,then yes someone would need the drive password to access the files on that drive, is not that what passwords are for ,I would assume that there are people who could hack your passwords like they do others ,good luck5 more replies
We have setup windows 7 enterprise and have encrypted the machine. Everytime i reboot it asks for the recovery key. I have done the following. We have MBAM setup and the keys are stored automatically. I have had success with older models but this specific model
is giving me a hard time.
1. Made the C drive the first boot device
2. Paused bitlocker, rebooted and resumed.
3. Removed Encryption. Rebooted and encrypted again.
4. Downgraded TPM to 1.2 from 2.0
Hello Suport
I am using my office Laptop running Windows 7 which is been configure with Bitlocker PIN and it used to work perfectly for over year. I still remeber the password for sure .
Today morning my computer reboot " look like after windows update " but for some reason it ask me for Recovery key entry which I don't have
It show me the Recovery Key ID which is alpha numeric but the key does only accept numbers and NO letters
Can you help me to find the Recover Key ?
I have try Microsoft online where it store the recovery key but I am afraid nothing there
My Surface Pro 3 shut down after my battery ran down flat a week ago. On trying to turn my system on, the Surface Pro 3 requested for my Bitlocker Recovery key. I was able to get the Bitlocker Recovery Key using another device and I used it and my
Surface Pro3 came on again. My only problem now is that whenever I shut down the system, it refuses to turn on, except I re-enter the 40-digit Recovery number before I have access to my files and documents. I find that as a serious inconvenience
to me. Kindly advise me on how the system will operate normally so that I don't have to re-enter a long string of 40-digit number before I have access to my Surface Pro 3 please.
Best regards
Kilyobas Binga
HiI cant boot in to internet on my HP Stream 7 Tablet 5700na Tablet.A blue screen appears ,it says,Bitlocker,.Enter the recovery key to get going again(Keyboard Layout: United Kingdom)Please send me a Bitlocker Recovery Key,I dont have a Bitlocker Recovery KeyI do have the ID key numberI have tried to boot in to internet by various troubleshooting methods,without success,but the blue screen keeps appearing.Please send me a Bitlocker REcovery Key for my HP Tablet
Thank you for visiting the HP Support Forums and Welcome.Pelase go through BitLocker recovery keys: Frequently asked questionsIf you're locked out of your PC, you'll need a BitLocker recovery key to sign back in.Why am I locked out?There are several reasons that might make a PC go into recovery mode. For example, your organization might have a password security policy that locks you out after a certain number of failed attempts to sign in. Or perhaps your PC encountered a hardware malfunction, an unexpected configuration change, or another security event. Requiring a recovery key helps ensure that only an authorized person can unlock your PC and restore access to your encrypted data.How can I get my BitLocker recovery key?Depending on how your PC is set up, there are different ways to get your recovery key.If your PC is connected to a domainContact your administrator to get your recovery key.If your PC isn?t connected to a domainThere are several locations in which your BitLocker recovery key might have been saved. Here are some places to check:Your Microsoft account online. This option is only available on non-domain-joined PCs. To get your recovery key, go to BitLocker Recovery Keys.A saved copy of the recovery key. You might have saved a copy of the BitLocker recovery key to a file, a USB flash drive, or printed a hard copy.If you saved the key to a file or printed it, find your copy, follow the instructions on your locked PC, and enter your key when prompted... Read more1 more replies
is there somewhere I can enter the key ID to recover a blk?More replies
I'm curious under what circumstances a recovery key can change and the numerical ID stays the same. I conducted a test that seems to indicate that the Numerical ID changes if the Recovery Key is changed or if the system is decrypted and re-encrypted.
I can't tell if these are the only conditions under which the Numerical ID would change.
We have a system that we can't get into that the printed backup of the Numerical ID matches what we see on screen but the Recovery Key we have doesn't work.
Hi, i have bitlocker encrypted hard drive and it needs a key to access it. I am trying to decrypt it using M3 data recovery. i have the correct bitlocker recovery key, but when i enter it, it gives me an error saying "BitLocker recovery key is incorrect, please click OK to learn how to get the correct Bitlocker recovery key"
Some help plz!
In line with forum rules we don't discuss circumventing passwords. It would be best in this case to contact BitLocker themselves.
6) No discussions of hacking someones system, network, password, etc.
my laptop has freezed, I restart it with power button but now, at start up, BitLocker said that:
You need to enter your recovery key because Secure Boot has been disabled. Either Secure Boot must be re-enabled, or BitLocker must be suspended for Windows to start normally.
I gone to UEFI settings and define a password to re-enabled Secure Boot but BitLocker when I restart comptuer said that Bios secure parameters has changed... It doesn't solve the problem.
The problem is I don't have my recovery key. I tried to recover my recovery key using Microsoft account but I had to update my phone number and so my security settings are locked for one month. My question is :
Is it possible to boot on Ubuntu USB key or plug HDD to an Ubuntu computer, copy files and decrypt them one by one with my password session ?Is it possible to retrieve my recovery key using Windows command line and session password ? (I can access to Windows recovery menu so I have access to commands line.)Is a program to decrypt completely my hard drive exists ? I will write it on a USB key, start it, enter my session password and it will decrypt all the disk or something like that.
Thanks a lot.
What do you mean by "session password?"
Assuming you are using a TPM with BitLocker (which is the default) then there is no way to recover your drive without the recovery key. That is the entire point of BitLocker.
Hey Guys,
Im new here so apologies if this in the wrong section.
Basically, massive problem here - I have a WD MyBook External HDD and have used BitLocker to Go on it from Windows 7 RC, and I kept the recovery key in my main HD Documents folder. (This was a x86 install).
Last night I (stupidly) backed up the key to the External HDD automatically forgetting it would be locked later (as it unlocks on startup so I forget it would be secured elsewhere) and went ahead to clean format my PC to a Windows 7 x64 RTM Install.
Now, when I come to plug in the drive today, instead of prompting for a password as it SHOULD, I instead am askked for the recovery key which I stupidly enclosed in the External HD itself.
Naturally, this External Drive contains my life, several GB of music, all of my college work, images, videos and so forth and I cannot really do with losing it all.
The only other information I can give is that at no point was the HD fully encrypted by BLocker, instead I used to cancel it at each start up and it never passed 3.5% so does this mean not ALL of the data is encrypted and maybe the key I copied into there last night may still be safe (no BL encryption went on after copying it?)
If so, how would I go about possibly finding this? Is there any other way to access the drive without getting the BLocker popup? I already tried a Live boot disk, cmd prompt etc?
Thank you.
8 more replies
Hello, My bitlocker drive got corrupted. However, I just need to extract a few files from that drive. Is there any free software that will do that? I have tried repair-bde but that didn't work. I tried M3 recovery software and that shows the files but it is too expensive to buy.More replies
I have a Dell Venue 8 Pro (tablet) with an Intel Atom running Windows 8.1. As of 9/14 I was current on all updates including BIOS and the Venue was working well. I installed some optional updates and when I restarted the Venue I got a screen from BitLocker
saying something about a signature that was not authentic and it wanted a recovery key. I had no idea about this recovery key or BitLocker business but suddenly my phone got a text and amazingly it was a recovery key which I input and got into the Venue, no
prob. Nothing was wrong when I got into Windows but I went straight in and uninstalled those optional updates (since that was the only thing I had changed lately) which required a restart. Again BitLocker wanted the recovery key which I entered and booted
up just fine. I used the Venue and shut it down like usual without another thought.
Next day I turned on the Venue and after the Dell splash screen all I got was this:
?Recovery There ae no more BitLocker recovery options on your PC
You?ll need to use the recovery tools on your installation media.
If you don?t have any installation media (like a disc or USB device), contact your system administrator or PC manufacturer.
Press the Windows key for UEFI Firmware Settings?
I don?t have installation media because the Venue came pre-loaded.
Of course pressing the windows key does nothing and all I can do is press the power key until it shu... Read more
Bitlocker Recovery Key Lost, And i cant access my drive. And my Antivirus Detected Bitlocker as threat and he automatically removed it from my Laptop, now the BitLocker Application is not working, He is saying' Bitlocker Not found' , so i cant access
my Drive. Is there is any option to Deactivate Bitlocker or i hav to format my Laptop, Formatting may result in losing some of my data in 'C' Drive. PLEASE help me to bet back BitLocker Recovery Key!
There are multiple threads for bitlocker in technet forums, one of them : http://social.technet.microsoft.com/Forums/en-US/w7itprosecurity/thread/bc1e970e-5673-4fb5-b636-c9f1519f4c14Arnav Sharma | Facebook |
Twitter Please remember to click ?Mark as Answer? on the post that helps you, and to click ?Unmark as Answer? if a marked post does not actually answer your question. This can be beneficial to other community members
reading the thread.
dear buddies please help me
I WAS ENCRYPTING MY EXTERNAL HARD DISK(160gb) .I SAVED THE BITLOCKER RECOCERY KEY AND IDENTIFICATION KEY . UNFORTUNATELY AT 40 % OF ENCRYPTION IT SOMEHOW STOPPED AND THE DISK GOT LOCKED. I TRIED TO UNLOCK IT WITH BITLOCKER RECOVERY KEY BUT IT DOESNT WORK . IT SHOWS NOT RESPONDING MESSAGE FOR HOURS TOGETHER.PLEASE HELP.I WILL BE HIGHLY OBLIGED.
Welcome to Seven Forums.
I don't know anything about the BitLocker which is I understand is bundled with Enterprise and Ultimate Editions. Still I was watching this thread to read about this issue as it developed. As there has been no development for 19 hours on this thread, I now feel that there is no solution for retrieving the system.
You may wait a day or two more to see if some suggestions come up but the only way out now seems to be to clean reinstall Windows 7 all over again. I hope you would not lose too much data. I don't think that the locked up files shall be visible with Ubuntu and Hiren's DVDs.
I have a Dell Venue 8 Pro (tablet) with an Intel Atom running Windows 8.1. As of 9/14 I was current on all updates including BIOS and the Venue was working well. I installed some optional updates and when I restarted the Venue I got a screen from BitLocker
saying something about a signature that was not authentic and it wanted a recovery key. I had no idea about this recovery key or BitLocker business but suddenly my phone got a text and amazingly it was a recovery key which I input and got into the Venue, no
prob. Nothing was wrong when I got into Windows but I went straight in and uninstalled those optional updates (since that was the only thing I had changed lately) which required a restart. Again BitLocker wanted the recovery key which I entered and booted
up just fine. I used the Venue and shut it down like usual without another thought.
Next day I turned on the Venue and after the Dell splash screen all I got was this:
?Recovery There ae no more BitLocker recovery options on your PC
You?ll need to use the recovery tools on your installation media.
If you don?t have any installation media (like a disc or USB device), contact your system administrator or PC manufacturer.
Press the Windows key for UEFI Firmware Settings?
I don?t have installation media because the Venue came pre-loaded.
Of course pressing the windows key does nothing and all I can do is press the power key until it shu... Read more
Hi, i have bitlocker encrypted hard drive and it needs a key to access it. I am trying to decrypt it using M3 data recovery. i have the correct bitlocker recovery key, but when i enter it, it gives me an error saying "BitLocker recovery key is incorrect, please click OK to learn how to get the correct Bitlocker recovery key"
Some help plz!
Hi, i would like to know how can i retrieve lost Bitlocker recovery key.More replies
Please how can I Get My BitLocker recovery key using the recovery id no
Hello Kelly, and welcome to Seven Forums.
You would have already needed to save your BitLocker recovery key to another location for safe keeping to be able to use it.
If you did, then you can use the tutorial below that's for your OS or removable drive for how to know what recovery key to use from the recovery ID.
BitLocker Drive Encryption - Unlock a Locked OS Drive
BitLocker Drive Encryption - Unlock a Locked Data or Removable Drive
BitLocker Repair Tool - Recover Drive in Windows 7 and 8
Hope this helps,
I have the Recovery ID for BitLocker, but I do not have the Recovery key. Is there a way to look up the Key with the Recovery ID?
Could you please explain a bit for the Recovery ID of the BitLocker? Do you mean the first 8 characters of the password? And are we in a domain environment?
If we are in a domain environment, we could use
Windows BitLocker Drive Encryption Recovery Password Viewer to find the recovery password through AD server. Windows BitLocker Drive Encryption Recovery Password Viewer is an optional feature that's included with the Remote Server Administration Toolkit
(RSAT), which you can install by using the Add Roles and Features
option in the Windows Server 2008 R2 and Windows Server 2012 Server Manager or from the
Programs and Features option in Control Panel.
And if we are in a workgroup, and the recovery key is missing, please take a look at the below article for all the possible BitLocker recovery methods:
How Do You Want to Recover BitLocker-Protected Drives?
Best regardsMichael Shao
TechNet Community Support
Do you need both? My last job never used Bitlocker and my new job requires it. I had been backing up the Bitlocker Recovery Key text file but then noticed the .Bek file on a computer that had hidden objects enabled.
I deployed a few laptops and if I need it, I will have to track them down.....I'm hoping not. Not trying to be lazy, I worked 12 hours yesterday and my mind hurts. Haha.
Anyone know how to fix this? I would appreciate your help!
Dell Venue pro 11 (Win 8.1)
HI. Do you use Bitlocker for your windows drive ?4 more replies
What is the best way to administrate recovery keys for Bitlocker without the use of Active Directory? I have a few laptops that they want encrypted but the domain we are going to join them to is not configured for Bitlocker recover. From what
I've read, MBAM is the tool that allows one to access/backup the recovery keys into/out of AD, can MBAM be used without Active Directory, on a stand alone machine on the same domain? Thank you for the help.
Hello, My bitlocker drive got corrupted. However, I just need to extract a few files from that drive. Is there any free software that will do that? I have tried repair-bde but that didn't work. I tried M3 recovery software and that shows the files but it is too expensive to buy.More replies
Exactly what my Surface 2 is showing below.
I purchased my Surface 2 from Best Buy. I do not have a BitLocker recovery key in my One Drive or anywhere else for that matter. Was Best buy supposed to give this to me at my purchase? I can't sign in to the Surface at all. Is
this a Bug!
Surface 2
...Preparing Automatic Repair
Your PC needs to be repaired
An unexpected error has occurred.
Error code: 0xc000000e
You'll need to use the recovery tools on your installation media. If you don't have any installation media (like a disc or USB device), contact your system administrator or PC manufacturer.
Press the Windows key to try again
BitLocker recovery
Enter the recovery key for this drive
BitLocker needs your recovery key to unlock this drive because the trusted platform module is not accessible.
For more information on how to retrieve this key, go to http://www.windows.microsoft.com/recoverykeyfaq from another PC or mobile device.
Use the number keys or function keys F1-F10 (use F10 for 0).
Recovery key ID: 00000000-0000-0000-0000-0000000000
Press Enter to continue
Press ESC or the Windows key for more recovery options
I lost my recovery key completely but I still have the password. Is there any way I can reach the recovery key without changing the password? (since I'm facing problems accessing it anyway and the solution requires a recovery key not a password)
Thanks in advance for any help.
Hello Margla, and welcome to Eight Forums.
You should still be able to unlock or recover a BitLocker drive with the BitLocker password.
BitLocker Recovery - Unlock a Drive in Windows 8
BitLocker Repair Tool - Recover Drive in Windows 7 and 8
BitLocker Drive Encryption - Unlock a Locked Data or Removable Drive - Windows 7 Help Forums
i encrypted my 1TB External HDD took backup of my laptop on it (including recovery keys backup files). formated my laptop reinstalled windows and now forgot the password for External HDD.
Any suggestions in recovering the key which is already backed up in the encrypted HDD.
thinking to format HDD and than attempt data recovery but not sure if i will be able to recover all or nothing.
Hello Teky, and welcome to Seven Forums.
If you format the encrypted drive, it will pretty much destroy any chance of recovering the drive.
If you don't have the BitLocker recovery key or password, then decrypting or recovering the drive will just about be impossible.
BitLocker Drive Encryption - Unlock a Locked Data or Removable Drive
BitLocker Repair Tool - Recover Drive in Windows 7 and 8
Can anyone help me please. I am not very technical so no jargon please. I have a mini asus laptop and I have only had it for about 3 months. I tried to switch it on recently and it says 'enter recovery key to get going again' I didn't know I had a recovery key but I went onto another computer to micosoft search and I have my key number. When I enter it it says 'diagnosing' then it gives me options to either 'continue to windows 10' settings' restart' advanced settings' etc.
I have tried them all in turn but nothing works. It accepts my key number and then just says diagnosing and then goes back to the original screen saying 'enter key' again. I have entered the key several times and then chose a different option but non work. How can I get back into my laptop?
Any advice please? Thanks
I am trying to access the files on my external hard drive that I encrypted using Bitlocker. The full recovery key identification matches exactly to what I have recorded, but when I paste in the
recovery key it states that the key is not correct. How can I fix this?
The Bitlocker recovery key is used for recovering the data if you have forgotten password. Please use the password key to gain access to these files.
For more information about bitlocker recovery key, please access the following link.
Also, the following link is for your reference.
How to use the BitLocker Repair Tool to help recover data from an encrypted volume
Please remember to click ?Mark as Answer? on the post that helps you, and to click ?Unmark as Answer? if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. ?
My surf pro is locked. I need a bitLocker recovery keys.More replies
Bitlocker not recognizing password and recovery key was saved to my microsoft account but I dont see it. Please help..More replies
when i boot up Windows, it shows "Starting Windows" and it throws an error:
UNMOUNTABLE_BOOT_VOLUME 0x000000ED
I'm trying to run CHKDSK on the volume through Windows Recovery Environment, but I have lost the recovery key.
Any idea what else can I do?
Jabez Gan [MVP] - http://www.msblog.org Contributing Author for: (Sybex) MCTS: Windows Server 2008 Applications Infrastructure Configuration Study Guide: Exam 70-643
I had the bitlocker recovery key already , but the problem is the keypad shows numbers only and i received a combination with alphabets and numbers , how can i type the bitlocker recovery key ?More replies
I have activated Bitlocker on two identical W8.1 pro machines, and on the first (C1) I have the option to use a password when logging into the computer, but the other (C2) only ask for the recovery key from USB stick. Both computers have no TPM, so Bitlocker is enabled without TPM, but this should give the possibility to start the computers using a password on 8.1 pro.
Can I somehow add a password to C2, or is my only option to remove the Bitlocker encryption and try again?
I have implemented BitLocker To Go at our company through GPO and recovery keys are backed up into AD DS to the computer object. I am now looking for a way to migrate these recovery keys to an other computer object as we are currently refreshing our workstations.
I have been trying to write a PowerShell script to backup the recovery key into AD when the removable drive is connected and unlocked on the new computer. You can retrieve the ID of the removable drive by the below cmdlet.
manage-bde -protectors F: -get
I am then trying to backup the recovery key using the below cmdlet.
manage-bde -protectors -adbackup F: -id {<id>}
This returns an error.
ERROR: Parameter "-ID" requires an argument.
Any ideas? Does this cmdlet only work for internal disks? Is there a better approach to migrate recovery keys to a new computer?
I have just had a repair on my laptop with fan issues. After that I found my laptop being locked by BitLocker so I followed Microsoft's instructions on how to find the recovery key. However, I couldn't fin any when I logined my account. What can I do now?More replies
I forgot bitlocker PIN on Win10. System gives me recovery key-id but I cannot enter characters like F,B,C etc that are included into the key-id. The input field that says "enter key-id" takes digits only. What am I doing wrong?
Initially I had encrypted my drive with bitlocker with Win 10 and saved my recovery key on my microsoft account.
Now as my system was getting slow as its I3 processor 3rd generation i switched back to win 8.1.
Forgot the password, but as i had bitlocker password available i thought i could recover my data but thats any issue to.
Even though the key id is same with the one store in onedrive i m able to recover. Please help me.
I moved my hard disk to another laptop which had bitlocker configured. when it boots up it prompts me to enter key (expected). I enter key and log in.
I run TPM.msc and select clear TPM. I then have to reboot, F1 to accept clear TPM - enter recovery key again. Log in win7, Prompted to reboot to Enable TPM, reboot, accept TPM enabled prompt, Enter recovery key again then log in to Win7. I thought that would
be the process but every time I reboot it promtps me for the key again...
Any idea what i'm doing wrong?
Thanks - Joe.
I found it - You have to enter 2 commands from a comand prompt to repopulate the TPM chip on the new laptop witht he recovery key.
Manage-bde ?protectors ?delete C: -type TPM
Manage-bde ?protectors ? add C: -tpm
That done the trick.
Thanks - Joe.
is there a way to encrypt a BitLocker drive without generating a recovery key?
Other encryption tools such as DiskCryptor/VeraCrypt/TrueCrypt or those found on Linux can simply be used with one PIN, no recovery key required.
BitLocker also allows to encrypt using a PIN. But, even when using a PIN, it still always seems to require to generate a recovery key in addition.
Is it possible to disable recovery keys altogether? So that only a PIN is set up to encrypt the drive and nothing else?
Why would you want a recovery key anyway, when you are already using a PIN? Why would you want to generate two passwords (PIN + recovery key) instead of just one password (only PIN without any recovery key)?
BitLocker Drive Encryption Operations Guide: Recovering Encrypted Volumes with AD DS describes what the recovery key is used for
If you don't anticipate any of those scenarios happening to you then just destroy any copies of the recovery key - it's not like someone is going to brute-force a 128-bit key.
We are having som problems with ours Lenovo ThinkCentre M900 models (both, Thiny and Tower, not using the SFF).They random goes to BitLocker Recovery on Boot or restart (no modification are done, and no USB-drives plugged in.Windows 10 Enterprise, 64-bits, build 10586, installed with SCCM, for drivers we are using Lenovo SCCM Package in the task sequence. Before we installs the PC's, we always updates BIOS to latest version (http://support.lenovo.com/se/sv/products/desktops-and-all-in-ones/thinkcentre-m-series-desktops/thin... and change theese settings i BIOS:Enabling Intel (R) Virtualization TechnologyEnabling VT-dEnabling TxTEnabling Secure Boot(Security Chip already active by enabling TxT)Changing the Boot order forPrimary Boot Sequence to SATA1 (the harddrive)Automatic Boot Sequence to SATA1 (the harddrive) [This setting we are only changing after we noticed the problem]Error Boot Sequence to SATA1 (the harddrive) [This setting we are only changing after we noticed the problem]We have the same setup on Lenovo ThinkCentre M93p, and there we have no problems.
We have the same issue with the M900 series (Tower). Windows 10 Enterprise build 10586 with DeviceGuard and BitLocker enabled. BIOS FWKT45A Security Features enabled:VTVT-dSecureBootTPM P310 doesn't seem to be affected.3 more replies
We are experiencing an interesting issue with some recovery keys not appearing AD due to a change in the recovery key ID.
Some background:
We install Windows 7 via Windows Deployment Services on a local server. In the setup process under the BitLocker options we choose the options of "TPM + PIN", "Store key in Active Directory", and "Wait for encryption to finish before proceeding". Sometimes
after deployment we have to rename the computer. And recovery keys are backed up to a folder on the Windows Deployment Server.
So what happens is, every so often we need to recover a key from AD but when we search for the first 8 characters of the Recovery Key ID, we cant find anything. However we have found that going back and pulling the key from the backup folder on the WDS server
will have a different recovery key ID, but the 48 digit recovery key will still unlock the drive.
Where we are stumped is why the Recovery Key ID changes between deployment and actual use.
We understand that Recovery Key IDs can be changed via script however that is not being done here.
Also this does not happen on every Win7 computer we deploy just some sporadically. But gives a real scare when we suddenly cant unlock a users computer from the AD key store.
We thought it might have been related to when the computer sometimes gets renamed after deployment, however the issue occurs on computers that have not been renamed since deployment.
So with that, I ask if an... Read more
Using a Dell tablet, with Windows 8.1, I now have to enter the 64-digit bitlocker recovery key every time I power up the tablet. After doing
so, it permits me to continue to restart. Previously, I was only required to enter a password to get to the desktop. If I run Windows update, or any other process which might require a restart, it will do so without having to reenter the bitlocker
key. How may I determine what caused this change in powering up the tablet, requiring the entry of more that just a normal password? This just occurred within the last 1-2 months.
Notebook Latitude E7450, entra tela azul, depois tela de reparo automático e depois pede chave para desbloquear o drive.
Ao selecionar para digitar manualmente, o teclado não permite digitar letras, somente números, sendo que a chave contém letras e números.
O que fazer? preciso urgente resolver.
After user Reboots the computer, it boots into the Recovery console.
When the computer loads the Bitlocker Recovery Console the user does a Alt-CTR-DEL and reboots the PC. What I don?t understand is after the reboot the computer boots up normal and does not go back into the recovery console.
1. Don?t know why the computer went into Recovery console
(I know the user did not boot from anything. I am thinking it could be a MS patch )
Is there any log that tells you why it booted to the Recovery console?
2. Why if doing a force reboot out of the from the Recovery console did it boot normal.
FYI, when I have tested this on my test laptop it never boots up normal after a force reboot.
Hi All,
After encrypt USB and save recovery file I noticed that bitlocker recovery key identification changes
I mean it's not the same on Recovery File.
Any Ideas?
If you do not have the password that bitlocker was set up with, then you are out of luck. The whole point of drive encryption is so that you cannot decrypt the data with out the key.2 more replies
Hi I have basic questation .
If I enable bitlocker without store password to ad a next move PC to OU , where is save bitlocker password to AD. Is saved to AD or is saved only before encrypting ? And If MBAM change recovery password , change bitlocker this password ?
Hi dear
I have windows 8. I make a password on my two drive with bitlocker and save the keys on my microsoft account. and now I forget the password and when I went to my account I just find the one keys on my account. two of my drive have same password. now I can open one of my drive. if I find the password of my account that have the key I can open the other drive.
How can I find the password when we have recovery key?
I find the password id and numerical password
C:\Windows\system32>manage-bde -protectors -add h: -recoverykey h:
BitLocker Drive Encryption: Configuration Tool version 6.2.9200
Copyright (C) 2012 Microsoft Corporation. All rights reserved.
Key Protectors Added:
Saved to directory h:
External Key:
External Key File Name:
C:\Windows\system32>manage-bde -protectors h: -get
BitLocker Drive Encryption: Configuration Tool version 6.2.9200
Copyright (C) 2012 Microsoft Corporation. All rights reserved.
Volume H: [Rezazy-HDD]
All Key Protectors
Numerical Password:
External Key:
External Key File Name:
Sorry forum rules prohibit this type of help1 more replies
After the latest update on my Lumia 925 when I turn the phone on I'm taken to a Bitlocker Recovery page asking me for a recovery key for 'this drive' as if my phone is a computer and I cannot go any further from that screen. Does anybody know how to fix this? Help ASAP would be appreciated!
I am in the same boat! I think the only option is to use Nokia Software Recovery FAQ - How can I recover/reset/restore my phone software? - Nokia - USANokia Software Recovery Tool updated with support for Windows Phone 8.1 and more! | Windows Phone Central7 more replies
Actually i saved data in partition, then after added bitlocker security.
I have password and key also.
Then I unlocked it for sometime, Due to my friend mistake, he deleted entire data from drive (which was enabled for bitlock). Data was huge so it just deleted without going to recyclebin.
So now i can recover data with DATA RECOVERY TOOL from partition.
But Its encrypted. bcuz in that drive data was encrypted.
So when i try to access its marked as not read (encrypted).
I think there is no way to put same data back in bitlock cover and unlock it or other solution.
If you have some suggestions, Please suggest.
I will be very thankfull to you.
After the latest update on my Lumia 925 when I turn the phone on I'm taken to a Bitlocker Recovery page asking me for a recovery key for 'this drive' as if my phone is a computer. DHelp ASAP would be appreciated!
I am in the same boat! I think the only option is to use Nokia Software Recovery FAQ - How can I recover/reset/restore my phone software? - Nokia - USANokia Software Recovery Tool updated with support for Windows Phone 8.1 and more! | Windows Phone Central2 more replies
I'm using a t420 with windows 7 professional and I decided to upgrade it with an SSDI made a recovery media using the Q: drive now when I try to instal windows 7 from the recovery media to the new SSD it stops at the screen when it asks for BitLocker recovery key the thing is that I don't have BitLocker on my computer since I'm using windows 7 professional, and I don't know how to pass this screen. I don't have a BitLocker account nor I never opened one help would be much appreciatedMore replies
So my old motherboard went kaput and I bought a new one and installed a fresh Win 8.1.
The problem is, one of my hard drives was encrypted with BitLocker.
I have a recovery key but the hdd doesn't show up with a letter in Win8.1. When I type "list disk" in Diskpart I can see my bitlocker hdd. I have tried to assign a letter but DiskPart says it has no volumes to assign letter.
I have my bitlocker recovery key but I can't use it without volume letter??
Any help/ideas?
I ran into something at least vaguely similar when I tried adding a new internal HDD to my computer. I ended up having to disable secure boot at least one time to let the new drive get picked up by the OS, then I could format it and all the rest and re-enable secure boot. Seems at least worth a try while someone else thinks up something better.2 more replies
Howdy, all!
Has anyone had any issues with getting BitLocker working without prompting for recovery within Win10 on this model? We purchased several 5480s and 7480s, and both models initially experienced issues where BitLocker would successfully enable and encrypt, but would prompt for the BitLocker Recovery Key at every boot. I was eventually able to get the 5480 models working by using the in-the-field downgrade to TPM 1.2, along with the 1.3.2 BIOS update, which specifically addresses "Win7" (i.e. TPM 1.2) BitLocker problems.
Try as I might, I can't find any combination of things that work with the 7480. Our imaging and boot sequence currently requires enabling Legacy ROMs in BIOS, and while we have plans to enetually move towards a straight UEFI boot sequence, it's going to require a pretty significant procedural change that we are NOT poised for right now. I noticed that there is not yet a 1.3.x BIOS revision available for the 7480, and that was the final piece of the puzzle eventually did the trick on the 5480 model. Does the 7480 suffer from the same problem, and is still pending a firmware fix? Or am I battling another problem altogether with the 7480 series?
Any information the community can provide will be helpful!
I forgot my bitlocker password and lost my recovery key
Have a read of CLICK HERE2 more replies
I've been looking on the worlds greatest text book and am unable to find a solution. I'm using a retail version of Windows 8 Pro and am creating my on refresh images. I can perform a refresh just fine through the PC settings however after bit locker encryption I cannot use the refresh feature; in setting bit locker, it says "You will no longer be able to use Windows Recovery Environment unless it is manually enabled and moved to the system drive".
The Problem: I cannot find on the internet how to manually enable or move a Windows Recovery Environment so that I can use the refresh feature with bit locker encryption.
When I was using the manufacture upgraded OEM I was able to use the refresh feature with bit locker encryption, but not the retail version. I don't want to use a USB thumb-drive to house the recovery environment, I just want it on the hard-drive.
I found the convenience of using the refresh feature over image backup is that it wouldn't format the drive to restore the image, thus loosing the encryption. the refresh feature maintains encryption.
your help would be greatly appreciated.
I recently worked through the Symantec Ghost process to create a repair partition. It works well except I only wish one could control acccess to is as a boot option rather than it being available to end-users.
My question is one of those is it possible questions. Has anyone combined the standard Bitlocker partition with the WinPE UFD partition needed to enable the F3 restore from the Symantec Ghost partition. If so, how can I accomplish this?
Would partitioning the hard drive and applying the UFD image to the second partition before installing Vista be all that needs to be done? Or will the bitlocker wipe out something important in the MBR when it is enabled.
Why, I have several systems dedicated to short term use where the image is static and Bitlocker is needed. If I can use F3 to reimage them rather than Ghostcast then it can be done anywhere the system is in the world. Otherwise it has to be done on a local subnet and it incurs more overhead in technician time and network resources.
I am looking for some assistance with Bitlocker and it's recovery mode triggering for strange reasons. I am new to using Bitlocker, and we are deploying it with Windows 7 Enterprise on the Dell Latitude E5470, with TPM 1.2.
Everything works great most of the time, but we have several instances where the battery dying or removing a laptop from a docking station, will trigger the Bitlocker recovery mode, and the only way to clear it is disabling/re-enabling Bitlocker entirely
(decrypt/re-encrypt) or removing either the RAM or CMOS battery, and performing a hardware reset.
Any suggestions or recommendations would be greatly appreciated!
i cant even connect with windows recovery tool and how to unlock this bitlocker recovery in mobile?More replies
Ok here is the deal. I had a new laptop that dual booted vista and linux. the vista partitioned was encrypted with bitlocker. I decide to give windows 7 a try so I repartition the drive in to one large volume, format and install windows 7. Everything worked perfectly. The problem is after about a week I realize there was some important files on the vista partition before I wiped everything out. I have found several data recovery programs the can recover files after a format, however they only show files that where on the linux partition. My guess is that the bitlocker encryption is preventing these tools from finding any of the vista files.
So the question is, Does anyone know of a application or company that can recover files from a bitlocker'ed drive after it has been formatted.
Actually i saved data in partition, then after added bitlocker security.
I have password and key also.
Then I unlocked it for sometime, Due to my friend mistake, he deleted entire data from drive (which was enabled for bitlock). Data was huge so it just deleted without going to recyclebin.
So now i can recover data with DATA RECOVERY TOOL from partition.
But Its encrypted. bcuz in that drive data was encrypted.
So when i try to access its marked as not read (encrypted).
I think there is no way to put same data back in bitlock cover and unlock it or other solution.
If you have some suggestions, Please suggest.
I will be very thankfull to you.
Sir i lost my recovery key and my D drive is locked i remember the password but it doesn't working please help me there is very important data in this folderMore replies
My drive E is locked and encrypted by Bitlocker To Go,it's a 500 GB Toshiba External USB hard drive. I forgot my Bitlocker password to unlock the drive
and now have misplaced my Bitlocker Recovery Key I wrote down. Is there a way I can retrieve or find out what my recovery key is? I am in need of getting the drive unlocked as I have very important data for work I need. Is there any way to retrieve it by the
ID number that is showing for my drive below? or any program that will unlock the drive? I have contacted my laptop manufacture through email already but have not got a response yet. I have also posted my issue here also! https://answers.microsoft.com/en-us/windows/forum/windows_7-security-winsec/bitlocker-recovery-key-was-lost-how-can-i-retrieve/baafe62d-be54-41c9-81b7-868770e8b1cf?messageId=42726c2d-3cd7-4913-8c7a-d0e9740e51e6&auth=1
Hi all,
Bitlocker is controlled by domain policies. First time Bitlocker is enabled on a computer, the recovery is saved to AD DS. I confirmed this in Computers object in AD DS.
However, when the user changes the PIN, there is no record of the new recovery key. Is that normal?
When I then manually force the recovery to AD by using manage-bde -protectors -adbackup C: -id { recoveryGUID }, a new entry appears in the computer object in the AD. Although that seems correct, when I tested it, this new recovery key is not valid. Bitlocker
on startup refers to the initial recoveryID instead of the new one created after the PIN change.
Is is correct that a PIN change does not result in a new recovery key? If not, which policies should I adjust in order to fix this.
Hope my post is sufficiently clear. Many thanks in advance.
Info:Server is 2012 R2. Client Win8.1 Pro
Hi All,
I have a drive with Bitlocker,
i delete drive in computer management,
now , how i recovery my files?
can you help me,Please?
Hi, I removed the Bitlocker password simply by hitting "Remove Passoword" on the right-click menu on the disk in Computer. Now I need the recovery key, but since I formated the USB-drive I had stored the recovery key on I'm stuck.
Do I have to format my Bitlocked drive?
Not sure whether this will help, but it may do: How to use the BitLocker Recovery Password Viewer for Active Directory Users and Computers tool to view recovery passwords for Windows Vista6 more replies
my External hard Drive was locked by bitlocker. I forgot my password and recovery key. how can i open and get my files?
i need the documents
Dell E7470 constant bitlocker recovery key after a reboot or shutdown. Happens with dock and no dock.
I tried the following:
Update Bios
downgrade TPM 2.0 to 1.2
clear TPM
decrypt and encrypt C:
This are windows 8 and 10 Ent.
is there a real fix that works? please help
Do you use BitLocker? Are you running with a Microsoft Account?
It has happened to my system a couple of times. I would get a URL reference which did contain BitLocker keys. I have never used BitLocker, but went and got the key from the site and entered it. I then decrypted the drive or at least turned off BitLocker and the message did not return.
If you check the BCD Store you might see the entry below in the Boot Manager section. I have not included the actual URL but it is on the Microsoft site.
To see the entry, if you have one, open an Admin command prompt and type BCDedit and hit enter.
Hello, Just last week Turn on Bitlocker on my X260 with Windows 10 Pro and everything worked fine. But few days later I run Lenovo System Update tool, it updated BIOS version from 1.34 to 1.35. After BIOS updated every boot loading it keep asking recovery key for Bitlocker. How can I to fix this issue? Thanks,BalgaaMore replies


text: > -----Original Message----- > From: beowulf-bounces at beowulf.org > [mailto:beowulf-bounces at beowulf.org] On Behalf Of Patrick Geoffray > Sent: Thursday, March 22, 2007 4:43 AM > To: beowulf at beowulf.org > Subject: Re: [Beowulf] Performance characterising a HPC application > > Greg Lindahl wrote: > > On Wed, Mar 21, 2007 at 06:41:07AM -0400, Scott Atchley wrote: > > > >> I have not benchmarked any applications that need more > than 250 MB/s > >> during computation, > > > > There is a large class of computations which alternate > non-overlapped > > compute and communicate cycles. The average over the > lifetime of the > > process can be ~ 100 MB/s, but that could easily mean it is > sending at > > 1 GByte/s for 10% of the runtime. If you slow down > communications by a > > factor of 4, the app will run a lot slower. > > In codes that alternate computation and communication (naive > but most common design), the communication phase is usually > much smaller that the computation, unless the problem is > imbalanced or too small. In my experience, 10% of the runtime > is realistic, but at 250 MB/s. So, when you bump the network > to 1 GB/s, you only gain 7.5% of runtime. That's why 1G > (GigE) is fine for a lot of cases, 2G is interesting for a > subset and 10G for even less apps. > > As everybody is communicating at the same time, you need to > increase the network bandwidth when you increase the number > of cores, to keep constant resources per core. However, these > codes are often bounded by contention rather than bandwidth. > The communication pattern is all-to-all or, worse, a careless > hand-made exchange. Even with a clean all-to-all, slight > imbalances easily create contention in the network > (N->1 contention), and the backpressure flow-control > propagates it everywhere as everybody is communicating at the > same time. Bigger pipes helps contention a bit, but not much. > > People doing their homework are still buying more 2G than 10G > today, because of better price/performance for their codes > (and thin cables). > People doing their homework test their applications and decide accordingly. There are several centers that provide free run time For that purpose. In your case, maybe your customers prefer your 2G over your 10G, but I am really not sure if most of the HPC users are buying more 2G rather than other faster I/O solutions..... All the real applications performance that I saw show that IB 10 and 20Gb/s provide much higher performance results comparing to your 2G, and clearly better price/performance. This is a good indication that applications require more bandwidth than 2G. > Patrick > -- > Patrick Geoffray > Myricom, Inc. > http://www.myri.com > _______________________________________________ > Beowulf mailing list, Beowulf at beowulf.org To change your > subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf >


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