Asus PIKE 1078 Specifications download pdf (Page 29)

ASUS PIKE 1078 2-15

5. Change the virtual disk options from the defaults listed on the screen as

needed.

Here are brief explanations of the virtual disk options:

• RAID Level: The drop-down menu lists the possible RAID levels for the

virtual disk. Select RAID 5.

• Strip Size: The strip size species the size of the segment written to

each disk in a RAID conguration. You can set the strip size to 8, 16, 32,

64, 128, 256, 512 or 1024 Kbytes. A larger strip size produces higher

read performance. If your computer regularly performs random read

requests, choose a smaller strip size. The default is 64 Kbytes.

• Access Policy: Select the type of data access that is allowed for this

virtual disk:

◊ RW: Allow read/write access. This is the default.

◊ Read Only: Allow read-only access.

◊ Blocked: Do not allow access.

• Read Policy: Specify the read policy for this virtual drive:

◊ Normal: This disables the read ahead capability. This is the default.

◊ Ahead: This enables read ahead capability, which allows the controller

to read sequentially ahead of requested data and to store the additional

data in cache memory, anticipating that the data will be needed soon.

This speeds up reads for sequential data, but there is little improvement

when accessing random data.

◊ Adaptive: When Adaptive read ahead is selected, the controller

begins using read ahead if the two most recent disk accesses occurred

in sequential sectors. If the read requests are random, the controller

reverts to Normal (no read ahead).

• Write Policy: Specify the write policy for this virtual drive:

3. When you have nished selecting physical disks for disk groups, click Next.

The span denition screen appears Select one of the available disk groups,

and then click Add to Span.

4. When nish, click Next. The Virtual

Disk Denition screen appears, as

shown in the following gure. You

use this screen to select the RAID

level, strip size, read policy, and

other attributes for the new virtual

disks.

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Asus PIKE 1078 Specifications Page 29