With IBM Spectrum Archive EE, the user specifies files to be migrated to the IBM Spectrum  Archive tape tier by using standard IBM Spectrum Scale scan policies. IBM Spectrum  Archive EE then manages the movement of IBM Spectrum Scale file data to IBM Spectrum  Archive tape cartridges. It also edits the metadata of the IBM Spectrum Scale files to point to  the content on the IBM Spectrum Archive tape tier.  Access to the migrated files through the IBM Spectrum Scale file system remains unchanged  with the file data provided at the data rate and access times of the underlying tape  technology. The IBM Spectrum Scale namespace is unchanged after migration, which makes  the placement of files in the IBM Spectrum Archive tape tier not apparent to users and  applications. The use of an IBM Spectrum Archive tape tier as an active archive is useful when there is a  need for a low-cost, long-term archive for data that is maintained and accessed for reference.  IBM Spectrum Archive satisfies the needs of this type of archiving by using open-format,  portable, self-describing tapes. In an active archive, the LTFS-file system is the main store for  the data. The IBM Spectrum Scale file system, with its limited disk capacity, is used as a  staging area, or cache, in front of IBM Spectrum Archive.  IBM Spectrum Scale policies are used to stage and destage data from the IBM Spectrum  Scale disks space to the IBM Spectrum Archive tape cartridges. The tape cartridges from the  archive can be exported for vaulting or for moving data to another location. Because the  exported data is in the LTFS format, it can be read on any LTFS-compatible system. The following list shows you the evolution and releases of the IBM Spectrum Archive EE  software since going to market in the year 2013: Note:  pGA stands for post-GA releases of IBM software or products. The pGA releases  usually contain a set of selected fixes. In this case, there are enhancements and some new  product function and features. IBM Spectrum Scale is a cluster file system solution, which means that it provides concurrent  access to one or more file systems from multiple nodes. These nodes can all be  SAN-attached, network-attached, or both, which enables high-performance access to this  common set of data to support a scale-out solution or provide a high availability platform.  Active archive History of the IBM Spectrum Archive EE releases 2.3 IBM Spectrum Scale  GLYPH<SM590000> Version 1.R1.0.0 (GA in 6/2013) GLYPH<SM590000> Version 1.R1.1.0 (1/2014) as pGA 1 GLYPH<SM590000> Version 1.R1.1.1 (6/2014) as pGA 2 GLYPH<SM590000> Version 1.R1.1.2 (12/2014) as pGA 2.1  GLYPH<SM590000> Version 1.R1.1.3 (3/2015) as pGA 2.2  GLYPH<SM590000> Version 1.R1.2.0 (5/2015) for the IBM Spectrum Archive renaming GLYPH<SM590000> Version 1.R2.0.0 (12/2015) GLYPH<SM590000> Version 1.R2.1.0 (6/2016) GLYPH<SM590000> Version 1.R2.2.0 (12/2016) GLYPH<SM590000> Version 1.R2.3.0 (3/2017) GLYPH<SM590000> Version 1.R2.4.0 (6/2017) GLYPH<SM590000> Version 1.R2.5.0 (11/2017) GLYPH<SM590000> Version 1.R2.6.0 (3/2018) Chapter 2. IBM Spectrum Archive overview  25