4. RAID System Configuration
Express5800/T120e Maintenance Guide
93
Chapter 2 Useful Features
7. Use the cursor keys to move the cursor to
RAID
,
Size
,
DWC
,
RA
, or
Span
.
To specify each setting, press <Enter> key.
(1)
RAID
: Specifies the RAID level.
Parameter
Description
0 RAID0
1 RAID1
10 RAID10
The available RAID level is depending on the number of hard disk drives configuring the array.
Important Although RAID5 is displayed, this server does not support RAID5.
(2)
Units
: Specifies the units of the Virtual Drive capacity specified by
Size
(MB, GB, or TB).
(3)
Size
: Specifies the Virtual Drive capacity. Up to eight Virtual Drives can be created. For RAID10,
the Virtual Drive capacity cannot be specified.
(4)
DWC
: Specifies the disk write cache.
Parameter
Description
Off Write
through
On* Write
back
*Recommended
*
On
(write back) is recommended for this server, but note that
cache data is lost when a power failure occurs.
When
Off
is chosen, the performance is lowered to 50% or less
compared with
On
state.
(5)
RA
: Specifies whether to perform read ahead.
Parameter
Description
Off
Does not perform read ahead
On*
Performs read ahead
*Recommended
(6)
Span
: Specifies the span setting.
This parameter is not used for this server.