User's Manual

Comparing RAID Level And Concatenation Performance
The following table compares the performance characteristics associated with the more common RAID
levels. This table provides general guidelines for choosing a RAID level. Evaluate your specific
environment requirements before choosing a RAID level.
NOTE: The following table does not show all supported RAID levels in Storage Management. For
information on all supported RAID levels in Storage Management, see Choosing RAID Levels And
Concatenation.
Table 1. RAID Level and Concatenation Performance Comparison
RAID Level Data
Availability
Read
Performanc
e
Write
Performanc
e
Rebuild
Performanc
e
Minimum
Disks
Required
Suggested
Uses
Concatenati
on
No gain No gain No gain N/A 1 or 2
depending
on the
controller
More cost
efficient than
redundant
RAID levels.
Use for
noncritical
data.
RAID 0 None Very Good Very Good N/A N Noncritical
data.
RAID 1 Excellent Very Good Good Good 2N (N = 1) Small
databases,
database
logs, and
critical
information.
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