RAID-5 Volumes
A RAID-5 volume is a fault-tolerant volume that stripes data and parity across three or more disks. Parity is a calculated value that is used to reconstruct data if one disk fails. When a disk fails, Windows Server 2003 continues to operate by recreating the data that was on the failed disk from the remaining data and parity. RAID-5 volumes are available only on computers running the Windows 2000 Server family or Windows Server 2003.