5. RAID System Configuration
Express5800/R110i-1, T110i-S, T110i Maintenance Guide
132
Chapter 2 Useful Features
7. Select a relevant value for
RAID
,
Units
,
Size
,
DWC
,
RA
, and
Span
by using cursor keys.
Press the <Enter> key to fix the selection to determine each value.
(1)
RAID
: Specify the RAID level.
Parameter Remarks
0 RAID0
1 RAID1
10 RAID10
The selectable RAID level varies depending on the number of physical devices that configure a
disk array.
Important Screen for RAID5 may appear, but this server does not support RAID5.
(2)
Units
: Specify the unit (MB, GB, or TB) used in "
Size
" field.
(3)
Size
: Specify the size of the virtual drive. Up to eight Virtual Drives can be created per RAID
Controller.
(4)
DWC
(Disk Write Cache): Specify the method for writing cached data to the disk.
Parameter Remarks
Off Write
through
On* Write
back
* Recommended
For this workstation, write back is recommended for good
performance. Note, however, that cached data may be lost
at an unexpected power failure. Selecting write through
degrades performance by approximately 50%.
(5)
RA
(Read Ahead): Specify whether to use read-ahead.
Parameter Remarks
Off
Does not perform read ahead.
On*
Performs read ahead.
* Recommended
(6)
Span
: Specify Span.
The server does not use this feature.