Definitions for "RAID 5"
In RAID 5 (Parity Striping), parity data is saved, as in RAID 4. However, these are not saved to a single hard disk, but distributed among several. When a hard disk fails, this speeds up access to parity data, compared to RAID 4.
similar to Level 4 but improves performance by also striping parity info across multiple drives.
RAID 5, like RAID 4, is commonly called guarding. RAID 5 is identical to RAID 4, except that the parity data is distributed evenly across all physical drives instead of a parity drive. In configurations using a large number of physical drives in which a large number of simultaneous small write operations are being performed, RAID 5 offers potentially higher performance than RAID 4. RAID 4 and RAID 5 configurations are appropriate in high-availability application programs where performance is less critical or where high data capacity is required. See also guarding.