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RAID Level Comparison
Table 2-8 provides the comparison between RAID levels in performance, minimum number of drives, and drive usage.
Table 2-8 RAID level comparison
RAID Level |
Reliability |
Read Performance |
Write Performance |
Drive Usage |
|---|---|---|---|---|
RAID 0 |
Low |
High |
High |
100% |
RAID 1 |
High |
High |
Medium |
50% |
RAID 5 |
Better than medium |
High |
Medium |
(N - 1)/N |
RAID 6 |
Better than medium |
High |
Medium |
(N - 2)/N |
RAID 10 |
High |
High |
Medium |
50% |
RAID 50 |
High |
High |
Better than medium |
(N - M)/N |
RAID 60 |
High |
High |
Better than medium |
(N - M x 2)/N |
Note: N indicates the number of member drives in a RAID array, and M indicates the number of spans in a RAID array. |
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