Use the information in this section to choose the most appropriate RAID level for the logical devices in your storage space, based on the number of available disk drives and your requirements for performance and reliability.
Selecting a RAID Level by Feature Set
Note! RAID 5EE includes a built-in hot spare.
RAID Level |
Redundancy |
Disk Drive Usage |
Read Performance |
Write Performance |
Minimum Drives |
RAID 0 |
No |
100% |
*** |
*** |
2 |
RAID 1 |
Yes |
50% |
** |
** |
2 |
RAID 1E |
Yes |
50% |
** |
** |
3 |
RAID 10 |
Yes |
50% |
** |
** |
4 |
RAID 5 |
Yes |
67% |
*** |
* |
3 |
RAID 5EE |
Yes |
50% |
*** |
* |
4 |
RAID 50 |
Yes |
67% |
*** |
* |
6 |
RAID 6 |
Yes |
50% |
** |
* |
4 |
RAID 60 |
Yes |
50% |
** |
* |
8 |
Spanned Volume |
No |
100% |
*** |
*** |
2 |
RAID Volume |
No |
50% |
*** |
*** |
4 |
Selecting a RAID Level by Logical Device Size
Disk drive usage, read performance, and write performance depend on the number of drives in the logical device. In general, the more drives, the better the performance.
Number of Disk Drives in Logical Device |
Possible RAID Levels |
One |
Simple volume |
Two |
RAID 0, RAID 1 |
Three or more |
RAID 0, RAID 1E, RAID 5 |
Four or more |
RAID 0, RAID 6, RAID 10, RAID 5EE |
Six or more |
RAID 0, RAID 50 |
Eight or more |
RAID 0, RAID 60 |