NEC Express5800 120Rj-2 User Manual page 121

User Guide
Parameters for VD Definition
Item
RAID Level RAID 0 / RAID 1 / RAID 5 / RAID 6 /
RAID 00 / RAID 10 / RAID 50 / RAID60
Strip Size 8 KB / 16 KB / 32 KB / 64 KB / 128 KB
/ 256 KB / 512 KB / 1024 KB
Access Policy RW / Read Only / Blocked
Read Policy Normal / Ahead / Adaptive
Write Policy WBack / WThru
WrtThru for Checked / Unchecked
BAD BBU
IO Policy Direct / Cached
Disk Cache NoChange / Enable / Disable
Policy
Disable BGI No / Yes
■
BGI (Back Ground Initialize) is available only for a RAID5 VD
configured with five or more HDDs.
■
To use RAID 5 or RAID 6, with an Internal RAID Controller,
you need to install the optional RAID Upgrade Kit.
■
If the RAID Upgrade Kit is not installed, do not select
"RAID5" that may appear in [RAID Level] box. If selected,
you will fail to save the configuration information. In such a
case, you need to define a VD again from the beginning.
Table 25: Configuration Wizard Parameters
Parameters
Caution
RAID 00, RAID 10, RAID 50, and RAID 60 are not
supported.
Recommended value: 64KB
Recommended value: RW
Recommended value: Normal
WBack: WriteBack
WThru: WriteThru
Select a mode when WriteBack is specified for
Write Policy.
Checked: Normal WriteBack
Unchecked: Constant WriteBack
Recommended value: Checked
Recommended value: Direct
Recommended value: Disable
Specify whether to perform Background Initialize
after creation of VD.
Recommended value: No
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