RAID Controller Card User Guide (x86) 14
RAID 0, 1, 5, 6, 10, 50, and 60
The 9460-16i supports up to:
- 240 drives.
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The total number of drives of all RAID arrays is the sum of the hot spare drives, the idle drives (drives in Unconfigured Good state), and the drives added in RAID arrays.
- 64 virtual drives, specified by Virtual Drive on the Configuration Utility.
- 64 drive groups and 240 drives for each group, specified by Drive Group on the Configuration Utility.
- Each drive group holds up to 16 virtual drives (specified by Virtual Drive).
Table 22-2 lists the quantity of drives supported by the 9460-16i.
Table 22-2 Supported RAID levels and quantity of drives
RAID Level |
Total Drives |
Spans |
Total Drives per Span |
Maximum Number of Failed Drives Allowed |
|---|---|---|---|---|
RAID 0 |
1 to 32 |
N/A |
N/A |
0 |
RAID 1 |
Even numbers from 2 to 32 |
Half the number of drives |
||
RAID 5 |
3 to 32 |
1 |
||
RAID 6 |
3 to 32 |
2 |
||
RAID 10 |
Even numbers from 4 to 240 |
2 to 8 RAID 1 |
Even numbers from 2 to 32 |
Number of spans |
RAID 50 |
6 to 240 |
2 to 8 RAID 5 |
3 to 32 |
Number of spans |
RAID 60 |
6 to 240 |
2 to 8 RAID 6 |
3 to 32 |
Total spans x 2 |
- RAID 00 is not supported.
- A RAID array consists of multiple spans. For example, a RAID 50 array consists of two RAID 5 spans.
- Each span of a RAID 10 or 50 array allows for only one failed drive.
- Each span of a RAID 60 array allows for a maximum of two failed drives.
- The number of drives in RAID 10, 50, and 60 is determined by the number of spans and the number of drives supported by each span.
- Due to the design of RAID 5, when the number of hard drives increases, the data reconstruction becomes more complex and risky upon failure of a single drive, which may cause logical bad blocks and data damage.
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