Asus PIKE 2108 - Manual (Page 31)

ASUS PIKE 2108 2-17
• Drive Cache: Specify the drive cache policy:
◊ 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 10
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.
16. Click Accept to accept the changes to the virtual drive definition, or click
Reclaim to to undo the changes.
17. Click Yes to confirm the write policy mode you have chosen.
18. When you are finished defining virtual drives, click Next. The configuration
preview screen appears.
19. Check the information in the configuration preview.
20. If the virtual drive configuration is acceptable, click Accept to save the
configuration. Otherwise, click Cancel to end the operation and return to the
WebBIOS main menu, or click Back to return to the previous screens and
change the configuration.
21. If you accept the configuration, click Yes at the prompt to save the
configuration.
22. Click Yes at the prompt to start initialization.
Using Manual Configuration: RAID 5
RAID 5 uses drive striping at the block level and parity. In RAID 5, the parity
information is written to all drives. It is best suited for networks that perform a
lot of small input/output (I/O) transactions simultaneously. RAID 5 provides data
redundancy, high read rates, and good performance in most environments. It also
provides redundancy with lowest loss of capacity.
RAID 5 provides high data throughput. RAID 5 is useful for transaction processing
applications because each drive can read and write independently. If a drive fails,
the RAID controller uses the parity drive to recreate all missing information. You
can use RAID 5 for office automation and online customer service that require
fault tolerance. In addition, RAID 5 is good for any application that has high read
request rates but low write request rates.