HP Surestore Disk Array 12h - And FC60 User Manual page 46

RAID Level Disk Striping
RAID 0 Yes
RAID 1 No
RAID 0/1 Yes
RAID 3 Yes
RAID 5 Yes
RAID Level
RAID 0 100%. All disk space is use for data storage.
RAID 1 and 0/1 50%. All data is duplicated, requiring twice the disk storage for a
given amount of data capacity.
RAID 3 and 5 One disk's worth of capacity from each LUN is required to store
parity data. As the number of disks in the LUN increases, so does
the storage efficiency.
3-disk LUN: 66%
4-disk LUN: 75%
5-disk LUN: 80%
6-disk LUN: 83%
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Mirroring Parity
No No
Yes No
Yes No
No Yes
No Yes
Storage Efficiency
Handle multiple disk
failures?
No. RAID 0 offers no data
redundancy or protection
against disk failure. RAID 0
should only be used for non-
critical data. The failure of a
single disk in a RAID 0 LUN
will result in the loss of all
data on the LUN.
No
Yes, providing both disks in
a mirrored pair do not fail.
No
No