When selecting a RAID level for your system, consider the following.
Data redundancy | Hard-disk- drive capacity utilization | Read performance | Write performance | Built-in spare drive | |
RAID level-0 |
No |
100% | Excellent | Excellent | No |
RAID level-1 | Yes | 50% | Very good | Very good | No |
RAID level 1-Enhanced | Yes | 50% | Very good | Very good | No |
RAID level-5 | Yes | 67% to 94% * | Excellent | Good | No |
RAID level 5-Enhanced | Yes | 50% to 88% * | Excellent | Good | Yes |
* Depending on the number of hard disk drives in the array.