User's Manual

RAID Level Data
Availability
Read
Performanc
e
Write
Performanc
e
Rebuild
Performanc
e
Minimum
Disks
Required
Suggested
Uses
RAID 5 Good Sequential
reads: good.
Transactiona
l reads: Very
good
Fair, unless
using
writeback
cache
Fair N + 1 (N = at
least two
disks)
Databases
and other
read
intensive
transactional
uses.
RAID 10 Excellent Very Good Fair Good 2N x X Data
intensive
environment
s (large
records).
RAID 50 Good Very Good Fair Fair N + 2 (N = at
least 4)
Medium
sized
transactional
or data
intensive
uses.
RAID 6 Excellent Sequential
reads: good.
Transactiona
l reads: Very
good
Fair, unless
using
writeback
cache
Poor N + 2 (N = at
least two
disks)
Critical
information.
Databases
and other
read
intensive
transactional
uses.
RAID 60 Excellent Very Good Fair Poor X x (N + 2) (N
= at least 2)
Critical
information.
Medium
sized
transactional
or data
intensive
uses.
N = Number of physical disks
X = Number of RAID sets
No-RAID
In Storage Management, a virtual disk of unknown metadata is considered a No-RAID volume. Storage
Management does not support this type of virtual disks. These must either be deleted or the physical disk
must be removed. Storage Management allows Delete and Rename operation on No-RAID volumes.
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