NEC Express5800/R110i-1 Maintenance Manual page 148

Chapter 2 Useful Features
5)
148
Specify values for Virtual Drive Name, Virtual Drive Size, Virtual Drive Size Unit, Disk
WC, and Read Ahead.
5-1. Virtual Drive Name: Specify the name of the virtual drive. (Optional).
5-2. Virtual Drive Size: specifies 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.
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.
5-5. Read Ahead: Specify the Read Ahead setting.
Parameter
Disable Does not perform read ahead.
Enable* Performs read ahead.
Express5800/R110i-1, T110i-S, T110i Maintenance Guide
Remarks
* Recommended
Remarks
* Recommended
5. RAID System Configuration