5. RAID System Configuration
Express5800/T110f-S, R110f-1E, T110f-E Maintenance Guide
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Chapter 2 Useful Features
7. Use the arrow keys to move the cursor to RAID, Size, DWC, RA, or Span.
To specify each setting, press <Enter> key.
(1) RAID: Specify 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 if three or more hard disk drives are
configured, this server does not support RAID5.
(2) Units: Specify the units of the virtual drive capacity specified by Size (MB, GB, or TB).
(3) Size: Specify the virtual drive capacity. Up to eight virtual drives can be created. The capacity of the
virtual drive for RAID10 cannot be specified.
(4) DWC: Specify 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 power failure occurs.
When Off is selected, the performance is lowered to 50% or less
compared with On state.
(5) RA: Specify whether to perform read ahead.
Parameter Description
Off Do not perform read ahead
On* Perform read ahead
*Recommended
(6) Span: Specify the span settings.
This parameter is not used for this server.
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