21.1 Comparing RAID Levels
Use this table to select the RAID levels that are most appropriate for the logical drives on your storage space, based on the number of available disk drives and your requirements for performance and reliability.
RAID Level |
Redundancy |
Disk Drive Usage |
Read Performance |
Write Performance |
Built-in Hot Spare |
Minimum Disk Drives |
|---|---|---|---|---|---|---|
RAID 0 |
No |
100% |
*** |
*** |
No |
2 |
RAID 1 |
Yes |
50% |
** |
** |
No |
2 |
RAID 1(Triple) |
Yes |
33% |
** |
** |
No |
3 |
RAID 1E |
Yes |
50% |
** |
** |
No |
3 |
RAID 10 |
Yes |
50% |
** |
** |
No |
4 |
RAID 10(Triple) |
Yes |
33% |
** |
** |
No |
6 |
RAID 5 |
Yes |
67 – 94% |
*** |
* |
No |
3 |
RAID 50 |
Yes |
67 – 94% |
*** |
* |
No |
6 |
RAID 6 |
Yes |
50 – 88% |
** |
* |
No |
4 |
RAID 60 |
Yes |
50 – 88% |
** |
* |
No |
8 |