of drives allowing for the removal of one of the lesser capacity drives. Once replaced with a drive of higher capacity the system will automatically redistribute used capacity among the pool to ensure space capacity on each drive. Users (specifically those who configure a family's home server) dealt with storage at two levels: Shared Folders and Disks. The only concepts relevant regarding disks was whether they had been "added" to the home server's storage pool or not and whether the disk appeared healthy to the system or not. This was in contrast with Windows' Logical Disk Manager which requires a greater degree of technical understanding in order to correctly configure a RAID array. Shared Folders had a name, a description, permissions, and a flag indicating whether duplication (redundancy) was on or off for that folder. If duplication was on for a Shared Folder (which was the default on multi-disk Home Server systems and not applicable to single disk systems) then the files in that Shared Folder were duplicated and the effective storage capacity was halved. However, in situations where a user may not have wanted data duplicated (e.g. TV shows that had been archived to a Windows Home Server from a system running Windows Media Center), Drive Extender provided the capability to not duplicate such files if the server was short on capacity or manually mark a complete content store as not for duplication. A known limitation of Drive Extender was that it in some cases changed timestamp of directories and files when data was moved around between disks. According to Microsoft this was expected behavior. This caused unexpected behavior when using clients that sort media based on date. Examples are XBMC, MediaPortal, and Squeezebox Server. The aforementioned programs worked fine with WHS; however, files may have appeared out of order due to this caveat. Cancellation On 23 November 2010, Microsoft announced that Drive Extender would be removed from Windows Home Server 2011. This led to public outcry in the announcement's comments section. Criticism of Drive Extender's removal mainly related to it being seen as a core feature of Windows Home Server and a key reason for adoption. As a replacement for Drive Extender, Microsoft stated that OEMs would use RAID on their Windows Home Server products. Computer Backup and Restore Windows Home Server Computer Backup automatically backs up all of the computers in a home to the server using