By using shadow copies, a Windows Server 2003-based file server can efficiently and transparently maintain a set of previous versions of all files on the selected volumes. End users access the file or folder by using a separate client add-on program, which enables them to view the file in Windows Explorer. The client program, which is included on the Windows Server 2003 CD, integrates seamlessly with the client PC and enables the user to view the previous version of the file.
Probably the most well known fault tolerant technology supported by Windows is software RAID, which is available on systems where basic disks have been changed to dynamic disks. RAID 0 (disk mirroring) is an excellent method for providing fault tolerance for boot/system volumes, while RAID 5 (disk striping with parity) increases both the speed and reliability of high-transaction data volumes such as those hosting databases. Software RAID means that RAID is implemented within Windows itself, but for even higher performance and greater fault tolerance Habibi's can choose to implement hardware RAID instead, though this is generally a more expensive solution than software RAID. Traditionally most software RAID systems have used SCSI, but another option common nowadays is SATA (Serial ATA), which is usually only a fraction of the cost of SCSI but with almost comparable performance.
There's more to RAID as far as fault tolerance in st ...Show more