Adaptec DuraStor 7220SS User Manual page 128

R
RAID 0
See stripe set (RAID
RAID 0/1
See stripe set of mirror sets (RAID
RAID 0/5
See stripe set of RAID 5 sets (RAID
RAID 1
See mirror set (RAID
RAID 3
A RAID 3 set is an array made up of three or more disk drives. It
uses parallel access, meaning all member disk drives participate
concurrently in every I/O operation directed at the array. Each
virtual disk drive I/O operation is subdivided and distributed
(striped) across all data disk drives; therefore, it uses small stripe
depth. Parity check data is stored on a separate parity disk drive.
See also chunk; partition; parity.
RAID 4
A RAID 4 set is an array made up of three or more disk drives.
Data blocks are distributed as with RAID 0 (disk striping). It differs
from RAID 3 in two ways: 1) it normally uses independent access
(rather than parallel access), meaning the array's disk drives may
operate independently of each other allowing multiple
simultaneous read and write operations, and 2) stripe depth is
larger than the virtual disk drive average I/O size. Parity check
data is stored on a separate parity disk drive. See also chunk;
partition; parity.
RAID 5
A RAID 5 set is an array made up of at least three or more disk
drives. It is similar to a RAID 4 set except that the parity check data
is distributed among all of the disk drives rather than being stored
on a separate disk drive. See also chunk; partition; parity.
RAID 50
See stripe set of RAID 5 sets (RAID
0).
0/1).
50).
1).
50).
Glossary
Glossary-7