I have sandisk 16 GB pendrive when fromat its shows an error media is wrtie protected.I search many tool &amp; ways &amp; trick but fail to fix this issue. Please if any one have solution please help me to get out from this issue.
So, somehow over the weekend, my 1GB USB flash drive has managed to become write-protected.  There is no switch on the stick, so I'm concluding that something has corrupted at some point.  Obviously I can't format it or remove.  The output from dmesg | tail is:  Buffer I/O error on device sdb1, logical block 328168 lost page write due to I/O error on sdb1 sd 73:0:0:0: [sdb] Unhandled sense code sd 73:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 73:0:0:0: [sdb] Sense Key : Data Protect [current] Info fld=0x0 sd 73:0:0:0: [sdb] Add. Sense: Write protected sd 73:0:0:0: [sdb] CDB: Write(10): 2a 00 00 05 08 00 00 00 01 00 Buffer I/O error on device sdb1, logical block 328200 lost page write due to I/O error on sdb1   I think the second and final lines are a giveaway to corruption, but I don't know how to interpret this output.  Could someone help to see if this output gives any indication?  I usually eject the drive before removing it, but I may have been lax once or twice.  The data isn't critical, it's just bugging me.  Any suggestions on how to fix it (if the drive even can be) would be greatly appreciated.
I hope it is alright to ask something like this here, I am having trouble keeping up with all the special cases and my book is being kind of vague.  I know how to do the standard method of finding diagonal matrices, but I know that triangular matrices are special and my book makes a connection, but it is hard to tell what it is.  Thanks. Nested Mathematical Functions This question has bugged me for a while. I want to write a nested function, f(g(x)). If I naively enter it:  \begin{align}     f(g(x))=y \end{align}     The problem is that each and every parenthesis is the same size as all of the others. Shouldn't the outer parentheses be larger? But if I do this:  \begin{align}     f\left(g(x)\right)=y \end{align}     Now it looks even less like the functions are nested. What's the proper way to do this? How can I make my touchpad scroll either vertically or horizontally, but not both? If I'm browsing the internet and a page has both horizontal and vertical scroll bars it becomes really irritating to scroll with my touchpad. It keeps scrolling horizontally as well as vertically!  I'm using Ubuntu 16.04  and below are touchpad settings  Device 'SynPS/2 Synaptics TouchPad':     Device Enabled (160):   1     Coordinate Transformation Matrix (162): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000     Device Accel Profile (282): 1     Device Accel Constant Deceleration (283):   2.500000     Device Accel Adaptive Deceleration (284):   1.000000     Device Accel Velocity Scaling (285):    12.500000     Synaptics Edges (286):  1769, 5431, 1652, 4658     Synaptics Finger (287): 25, 30, 0     Synaptics Tap Time (288):   180     Synaptics Tap Move (289):   242     Synaptics Tap Durations (290):  180, 100, 100     Synaptics ClickPad (291):   0     Synaptics Middle Button Timeout (292):  75     Synaptics Two-Finger Pressure (293):    282     Synaptics Two-Finger Width (294):   7     Synaptics Scrolling Distance (295): 200, 200     Synaptics Edge Scrolling (296): 0, 0, 0     Synaptics Two-Finger Scrolling (297):   1, 1     Synaptics Move Speed (298): 1.000000, 1.750000, 0.036300, 0.000000     Synaptics Off (299):    1     Synaptics Locked Drags (300):   0     Synaptics Locked Drags Timeout (301):   5000     Synaptics Tap Action (302): 2, 0, 0, 0, 1, 3, 0     Synaptics Click Action (303):   1, 1, 0     Synaptics Circular Scrolling (304): 0     Synaptics Circular Scrolling Distance (305):    0.100007     Synaptics Circular Scrolling Trigger (306): 0     Synaptics Circular Pad (307):   0     Synaptics Palm Detection (308): 0     Synaptics Palm Dimensions (309):    10, 200     Synaptics Coasting Speed (310): 21.120001, 50.000000     Synaptics Pressure Motion (311):    30, 160     Synaptics Pressure Motion Factor (312): 1.000000, 1.000000     Synaptics Resolution Detect (313):  1     Synaptics Grab Event Device (314):  0     Synaptics Gestures (315):   1     Synaptics Capabilities (316):   1, 0, 1, 1, 1, 1, 1     Synaptics Pad Resolution (317): 83, 46     Synaptics Area (318):   0, 0, 0, 0     Synaptics Noise Cancellation (319): 8, 8     Device Product ID (277):    2, 7     Device Node (278):  "/dev/input/event6" Does metric signature affect the stress energy tensor? How to use "tens of" and "hundreds of"? If I'm not mistaken, tens of means 10 to 99 and hundreds of means 100 to 999. Is this correct? I found in some dictionaries that tens of is actually not correct.  I also found that hundreds of could also mean any arbitrary large number. So how would people usually interpret hundreds of? Based on context?  In my case, I want to describe numbers of some items that are usually 50-90 but sometimes could be around 100-200, but definitely not as many as 300 or so. I want to really emphasize that there are a lot of these items. In this case, can I say "... have tens or even hundreds of ..."? Would people misinterpret what I actually want to say? Area 51 login no longer redirects nor logs in When is $f=\left(\frac{\sqrt{p+4}}{1-p}-1\right)x^5-3x+\ln5$ decreasing $\forall\; x$? When is $$f=\left(\frac{\sqrt{p+4}}{1-p}-1\right)x^5-3x+\ln5$$ decreasing $\forall\; x$?    Diffrentiating: $$f'=5\left(\frac{\sqrt{p+4}}{1-p}-1\right)x^4-3$$ If $f$ is decreasing, $f'&lt;0$: $$5\left(\frac{\sqrt{p+4}}{1-p}-1\right)x^4-3&lt;0\implies x^4&lt;\frac3{5\left(\frac{\sqrt{p+4}}{1-p}-1\right)}$$ Since if $\left(\frac{\sqrt{p+4}}{1-p}-1\right)\to0^+\implies x^4&lt;+\infty$, which holds forallx, So:$$p=\frac{3\pm\sqrt{21}}2$$which doesn't ply with textbook-answer, since it mentions an domain for p. Conventions for function notation I'm in year 11 right now and I just had a brief discussion with my maths teacher about function notation in trigonometry.  For a test, I wrote this,   sin(50)^2   I assumed that would be interpreted as sin(50)*sin(50)  But I was told the correct notation for this is is  sin^2 (50)   or optionally  (sin (50))^2   I'm curious if that is the 'proper' mathematical convention, or just how things are taught in high schools?  I'm Australian, in case there are some regional differences.  Thanks for the help! have lived vs have been living Is it correct to say:     1) I've lived in London for five years.   Or      2) I've been living in London for five years.   I think second one is correct because we use present perfect continuous for actions started in past and is continuing in present. Matrices - Conditions for $AB+BA=0$ The Problem Let $A$ be the matrix $\bigl(\begin{smallmatrix}a&amp;b\\c&amp;d\end{smallmatrix} \bigr)$, where no one of $a,b,c,d$ is $0$. Let $B$ be a $2\times 2$ matrix such that $AB+BA=\bigl(\begin{smallmatrix} 0&amp;0\\ 0&amp;0 \end{smallmatrix} \bigr)$. Show that either   $a+d=0$, in which case the general solution for $B$ depends on 2 parameters, or $ad-bc=0$, in which case the general solution for $B$ depends on one parameter.   (this is question 22 of the last matrix exercise of Further Pure Mathematics by Bostock et al.)  Comments Writing $B=\bigl(\begin{smallmatrix} e&amp;f\\ g&amp;h \end{smallmatrix} \bigr)$ and multiplying out I get that    $(a+d)(f+g)+(b+c)(e+h)=0$ $ae+bg+cf+dh=0$   but I am unable to get the required restrictions on $a,b,c,d$. Is there a quick way of doing the problem that doesn't require manual computation? I thought of considering invertible and non-invertible cases but couldn't get anywhere. Help would be much appreciated. My son got MineCraft PC for his birthday.  The account is under my e-mail and he has a name in the game (my terminology may be off as i do not play the game).  My other son would also like to play MineCraft, but have his own name (character???).  Can that be done?  It doesn't seem logical that I'd have to download 2 Minecraft games.  Please let me know how this works. I would like to manipulate the HTML inside an iframe using jQuery.  I thought I'd be able to do this by setting the context of the jQuery function to be the document of the iframe, something like:  $(function(){ //document ready     $('some selector', frames['nameOfMyIframe'].document).doStuff() });   However this doesn't seem to work. A bit of inspection shows me that the variables in frames['nameOfMyIframe'] are undefined unless I wait a while for the iframe to load. However, when the iframe loads the variables are not accessible (I get permission denied-type errors).  Does anyone know of a work-around to this? Suggested edits in top-bar put flags over the winterbash snowflake Suggested edits in the top bar put the flag count right over the winterbash snowflake. Looks pretty ugly if you ask me... How to get a DOM Element from a jQuery selector? Amazon RDS I/O requests - 1 query = 1 billable I/O? I have an InnoDB database that I'd like to migrate onto Amazon RDS.  My current implementation, hosted on my own server, shows roughly 8M queries per month.   say that  I/O Rate    $0.10 per 1 million requests  Does 1 I/O = 1 query?  ie, will I be billed $80/mo for this amount of usage + the RDS fees? Why won't my follower, Serana, follow me? I told my follower (Serana) to wait. But this is different. I told her to go somewhere and wait so it will activate the enemies. Well it did and I killed them. But Serana seems to be not following me anymore. I can't tell her to follow me. And she is constantly in a squatting position. The only thing I can do is tell her to wait somewhere else to move her. And I can't part ways because I'm doing a main quest and she has to be there. Can anybody give me a tip on what to do? Is there a word that describes a parent whose child has died?   Along the lines of "orphan", "widow", and "widower", is there a single word for a parent who has lost a child (of any age)? How can I check for Python version in a program that uses new language features? If I have a Python script that requires at least a particular version of Python, what is the correct way to fail gracefully when an earlier version of Python is used to launch the script?  How do I get control early enough to issue an error message and exit?  For example, I have a program that uses the ternery operator (new in 2.5) and "with" blocks (new in 2.6).  I wrote a simple little interpreter-version checker routine which is the first thing the script would call ... except it doesn't get that far. Instead, the script fails during python compilation, before my routines are even called. Thus the user of the script sees some very obscure synax error tracebacks - which pretty much require an expert to deduce that it is simply the case of running the wrong version of Python.  I know how to check the version of Python. The issue is that some syntax is illegal in older versions of Python. Consider this program:  import sys if sys.version_info &lt; (2, 4):     raise "must use python 2.5 or greater" else:     # syntax error in 2.4, ok in 2.5     x = 1 if True else 2     print x   When run under 2.4, I want this result  $ ~/bin/python2.4 tern.py  must use python 2.5 or greater   and not this result:  $ ~/bin/python2.4 tern.py    File "tern.py", line 5     x = 1 if True else 2            ^ SyntaxError: invalid syntax   (Channeling for a coworker.) Freeman and Tukey interval If $Y$ is Poisson$(\lambda)$ distributed, how do we obtain this confidence interval for $\lambda$:  $$ \left (\frac{(\sqrt Y+\sqrt{Y + 1}-z_{(α⁄2)} )^2 - 1}{4},\  \frac{(\sqrt Y+\sqrt{Y  +1}+z_{(α⁄2)} )^2 - 1}{4} \right ) $$ Is there any way of making a snow golem survive in hot biomes? Snow golems won't survive in the Nether (neither spawned in nor built ones). Is there a way to make a snow golem survive in the Nether and other hot biomes in vanilla Minecraft (i.e., without using mods)?