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Chapter 2 Useful Features
5-1. Virtual Drive Name: Specify the name of the virtual drive. (Optional)
5-2. Virtual Drive Size: Specify the capacity of the virtual drive.
5-3. Virtual Drive Size Unit: Specify the unit (MB/GB/TB) used for Virtual Drive Size.
5-4. Disk WC: Specify the Disk Write Cache policy.
5-5. Read Ahead: Specify the Read Ahead setting.
6)
When all the settings are completed, select Save Configuration.
Note
7)
Select Yes, and then select OK on the next screen. A virtual drive is created.
Parameter
Enable*
Write back
Disable
Write through
For this server, Setting Enable is recommended for good performance. Note, however,
that cached data may be lost at an unexpected power failure.
Selecting Disable degrades performance by approximately 50%, comparing with the
Enable setting.
Parameter
Disable
Does not perform read ahead.
Enable*
Performs read ahead.
You may select either of the upper or lower Save Configuration which is provided at two
locations.
Express5800/R120f-1E Maintenance Guide
Remarks
* Recommended
Remarks
* Recommended
5. RAID System Configuration
141
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