Asus PIKE 2008/IMR - Manual (Page 33)

ASUS PIKE 2008/IMR 2-19
Using Manual Configuration: RAID 50
RAID 50 provides the features of both RAID 0 and RAID 5. RAID 50 uses both
distributed parity and drive striping across multiple drive groups. It provides
high data throughput, data redundancy, and very good performance. It is best
implemented on two RAID 5 drive groups with data striped across both drive
groups. Though multiple drive failures can be tolerated, only one drive failure can
be tolerated in each RAID 5 level drive group.
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 Manual Configuration and click Next, the Drive Group Definition
screen appears. You use this screen to select drives to create drive groups.
1. Hold while selecting at least three ready drives in the Drives panel on
the left.
2. Click Add To Array to move the drives to a proposed drive group
configuration in the Drive Groups panel on the right.
If you need to undo the changes, click the Reclaim button.
3. Click Accept DG to create a RAID 5 drive group.
An icon for a second drive group displays in the right panel.
4. Click on the icon for the second drive group to select it.
5. Hold while selecting at least three more ready drives in the Drives
panel to create a second drive group.
6. Click Add To Array to move the drives to a proposed drive group
configuration in the Drive Groups panel on the right.
If you need to undo the changes, click the Reclaim button.
7. After yoiu finish selecting drives for the drive groups, select each drive group
and click Accept DG for each.
8. Click Next. The Span Definition screen appears. This screen displays the
drive group holes you can select to add to a span.
9. Under the heading Array With Free Space, hold while selecting a drive
group of three or more drives, and click Add to SPAN.
The drive group you select displays in the right frame under the heading
Span.
10. Hold while selecting a second drive group of three or more drives, and
click Add to SPAN.
Both drive groups display in the right frame under Span.
11. When finish, click Next. The Virtual Drive Definition screen appears. You
use this screen to select the RAID level, strip size, read policy, and other
attributes for the new virtual drive(s).