Asus PIKE 2008/IMR - Manual (Page 30)

2-16 Chapter 2: RAID configuration
Using Manual Configuration: RAID 10
RAID 10, a combination of RAID 1 and RAID 0, has mirrored drives. It breaks
up data into smaller blocks, then stripes the blocks of data to each RAID 1 drive
group. Each RAID 1 drive group then duplicates its data to its other drive. The size
of each block is determined by the strip size parameter. RAID 10 can sustain one
drive failure in each array while maintaining data integrity.
RAID 10 provides both high data transfer rates and complete data redundancy.
It works best for data storage that must have 100 percent redundancy of RAID
1 (mirrored drive groups) and that also needs the enhanced I/O performance of
RAID 0 (striped drive groups); it works well for medium-sized databases or any
environment that requires a higher degree of fault tolerance and moderate to
medium capacity.
When you select Manual Configuration and click Next, the Drive Group Definition
screen appears.
You use the Drive Group Definition screen to select drives to create drive groups.
1. Hold while selecting two ready drives in the Drives panel on the left.
2. Click Add to Array to move the drives to a proposed two-drive 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 1 drive group.
An icon for the next drive group displays in the right panel.
4. Click on the icon for the next drive group to select it.
5. Hold while selecting two more ready drives in the Drives panel to
create a second RAID 1 drive group with two drives.
6. Click Add To Array to move the drives to a second two-drive drive group
configuration in the Drive Groups panel.
If you need to undo the changes, click the Reclaim button.
7. Repeat the previous three steps until you have selected all the drives you
want for the drive groups.
8. After you finish selecting drives for the drive groups, select each drive group
and click Accept DG for each.
9. Click Next. The Span Definition screen appears. This screen displays the
drive group holes you can select to add to a span.
Select one of the available drive groups, and then click Add to SPAN.
10. Under the heading Array With Free Space, hold while selecting a drive
group with two drives, and click Add to SPAN.
The drive group you select displays in the right frame under the heading
Span.