NEC Express5800/B120a User Manual page 84

4-34 Configuring Your Server
7.
Press F10 to create virtual drive.
The [Virtual Drives Configure] screen appears. (The figure below shows an example of
RAID1 configured with two hard disk drives.)
8.
Select "RAID", "Size", "DWC", "RA", or "Span" by using cursor keys. Then press Enter
to fix the selection and set each value.
(1) "RAID": Sets RAID level.
Parameter
0
1
(2) "Size": Sets virtual drive size.
Up to 8 virtual drives can be created per RAID controller.
(3) "DWC": Sets parameter for Disk Write Cache.
Parameter
Off
On (Recommended) *
* DWC is factory-set to "On" in consideration of performance. The data in cache
memory may be lost if an unexpected power failure occurs. If set to "Off", the
performance may be decreased to approximately 50% or less.
(4) "RA": Sets parameter for Read Ahead.
Parameter
Off
On (Recommended)
(5) "Span: Sets Span.
Parameter
SPAN=NO (Recommended)
SPAN=YES
* SPAN is not available since the CPU blade contains only two hard disk drives.
Description
RAID0
RAID1
Description
Write thru
Write back
Description
Does not perform read ahead.
Performs read ahead.
Description
Does not perform SPAN.
Performs SPAN.