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Using Custom Configuration: RAID 50
RAID 50 provides the features of both RAID 0 and RAID 5. RAID 50 uses both
distributed parity and disk striping across multiple arrays. It provides high data
throughput, data redundancy, and very good performance. It is best implemented
on two RAID 5 disk arrays with data striped across both disk arrays. Though
multiple drive failures can be tolerated, only one drive failure can be tolerated in
each RAID 5 level array.
RAID 50 is appropriate when used with data that requires high reliability, high
request rates, high data transfer, and medium to large capacity.
When you select Custom Configuration and click Next, the Disk Group Definition
screen appears. You use this screen to select physical drives to create disk groups
(arrays).
1.
Hold <Ctrl> while selecting at least three ready physical drives in the Physical
Drives window on the left.
2.
Click Accept DG to move the drives to a proposed disk group configuration
in the Disk Groups window on the right.
If you need to undo the changes, click the Back button.
3.
Hold <Ctrl> while selecting at least three more ready physical drives in the
Physical Drives window to create a second disk group.
4.
Click Accept DG to move the
drives to a proposed disk group
configuration in the Disk Groups
window on the right, as shown in
the right figure.
If you need to undo the changes,
click the Back button.
5.
When you have finished selecting
physical disks for the disk groups,
click Next.
The span definition screen appears.
You should add both disk groups
you've created in the previous step
to Span section. Select the disk
group in Array With Free Space
section and then click Add to Span.
6.
When finish, click Next. The Virtual
Disk Definition screen appears, as
shown in the right figure.
2-24
Chapter 2: RAID configuration
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