Hitachi Compute Rack 210H, Руководство по биосу

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MegaRAID WebBIOS 2-45
Hitachi Compute Rack 210H/220H BIOS Guide
Table 2-17:
Specify the RAID level, strip size, and policies
Menu items Description Setting/display value
RAID Level RAID Level [RAID 10]
Strip Size Strip size 8KB / 16KB / 32KB / [64KB] / 128KB / 256KB /
512KB / 1MB
Access Policy Access policy [RW (reading and writing)] /
Read Only (reading only) /
Blocked (access denied)
Read Policy Read policy [Normal (no read ahead)] /
Ahead (always read ahead)
Write Policy 1 Write policy ● RAID controller with cache backup module:
Write Through /
Always Write Back /
[Write Back With BBU]
● RAID controller without cache backup module:
[Write Through] /
[Always Write Back] /
Write Back With BBU
IO Policy Read-cache
operation [Direct (cache: not used)] /
Cached (cache: used)
Disk Cache
2 Setting the disk
cache [Disable (cache: not used)] /
Enable (cache: used) /
No change (depending on the disk setting)
Disable BGI
2
Setting the
background
initialization No (background initializing valid) /
[Yes (background initializing invalid)]
Select Size
3
Size of a disk array Entering the maximum capacity value.
(minimum allowable value: 64 KB)
Notes:
1 If you use the RAID controller without cache backup module, use this item with the default
setting when installing an OS. Even if the system unit is connected to a UPS, the install may
not finish normally.
2 Change from the default value to the recommended value.
3 When you configure "Select Size", check the maximum allowable capacity displayed under
[Next LD, Possible RAID Levels] at the right of the window. And then you specify the value
at your discretion within the maximum capacity in accordance with the specified RAID level.
When you enter the value, completely delete the value in the box first and then enter the
value.
When you enter the maximum capacity, enter all the digits precisely including decimal
places and make sure you do not skip even zeros.
If multiple virtual drives reside on the same Drive Group, keep the
same setting for all the virtual drives.
If you specify a larger disk array size than the maximum capacity,
Unacceptable size is displayed on the window and all the setting
items are initialized. You need to reset all items to the correct size.