Asus PIKE 2108 - Manual (Page 28)

2-14 Chapter 2: RAID configuration
◊ NoChange: Leave the current drive cache policy unchanged. This is
the default.
◊ Enable: Enable the drive cache.
◊ Disable: Disable the drive cache.
• Disable BGI: Specify the background initialization status:
◊ No: Leave background initialization enabled. This means that a new
configuration can be initialized in the background while you use
WebBIOS to do other configuration tasks. This is the default.
◊ Yes: Select Yes if you do not want to allow background initializations
for configurations on this controller.
• Select Size: Specify the size of the virtual drive in terabytes, gigabytes,
megabytes, or kilobytes. Normally, this would be the full size for RAID 1
shown in the Configuration panel on the right. You may specify a smaller
size if you want to create other virtual drives on the same drive group.
8. Click Accept to accept the changes to the virtual drive definition, or click
Reclaim to return to the previous settings.
9. Click Yes to confirm the write policy mode you have chosen.
10. Click Next when you are finished defining virtual disks. The configuration
preview screen appears.
11. Check the information in the configuration preview.
12. If the virtual drive configuration is acceptable, click Accept to save the
configuration. Otherwise, click Back to return to the previous screens and
change the configuration.
13. If you accept the configuration, click Yes at the prompt to save the
configuration.
14. Click Yes at the prompt to start initialization.
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.