Dell EMC Server Administrator Storage Management 9.1

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 LevelData Availability Read Performance Write Performance Rebuild Performance Minimum Disks Required Suggested Uses
ConcatenationNo gainNo gainNo gainN/A1 or 2 depending on the controllerMore cost efficient than redundant RAID levels. Use for noncritical data.
RAID 0NoneVery GoodVery GoodN/ANNoncritical data.
RAID 1ExcellentVery GoodGoodGood2N (N = 1)Small databases, database logs, and critical information.
RAID 5GoodSequential reads: good. Transactional reads: Very goodFair, unless using writeback cacheFairN + 1 (N = at least two disks)Databases and other read intensive transactional uses.
RAID 10ExcellentVery GoodFairGood2N x XData intensive environments (large records).
RAID 50GoodVery GoodFairFairN + 2 (N = at least 4)Medium sized transactional or data intensive uses.
RAID 6ExcellentSequential reads: good. Transactional reads: Very goodFair, unless using writeback cachePoorN + 2 (N = at least two disks)Critical information. Databases and other read intensive transactional uses.
RAID 60ExcellentVery GoodFairPoorX 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