Editing Windows 2000 (section)

==== Volume fault tolerance ====
Along with support for simple, spanned and striped volumes, the Windows 2000 Server family also supports fault-tolerant volume types. The types supported are ''mirrored volumes'' and ''RAID-5 volumes'':
* Mirrored volumes''':''' the volume contains several disks, and when data is written to one it is also written to the other disks. This means that if one disk fails, the data can be totally recovered from the other disk. Mirrored volumes are also known as [[Redundant array of independent disks#RAID 1|RAID-1]].
* RAID-5 volumes''':''' a [[RAID 5|RAID-5]] volume consists of multiple disks, and it uses [[Block (data storage)|block]]-level striping with parity data distributed across all member disks. Should a disk fail in the array, the parity blocks from the surviving disks are combined mathematically with the data blocks from the surviving disks to reconstruct the data on the failed drive "on-the-fly."