Hitachi Compute Blade 500 Series - Page 258

Menu items Description Setting/display value
Cached (always reading from the
cache)
Disk Cache Policy Setting the disk cache [Disable (setting invalid)] / Enable
(setting valid) / <<Unchanged
(depending on the hard disk
setting)>>
Disable BGI Setting the background
initialization
<<No (background initializing
valid)>> /
[Yes (background initializing invalid)]
Select Size
2
Size of a disk array Enter any value within the maximum
capacity value. The lowest available
value is 64 KB.
Notes:
1. In Write Policy, Write Back with BBU is supported only. If not, write
performance may be degraded.
2. The maximum Select Size to be set is shown under Next LD, Possible RAID
Levels on the right pane. Type any value within the maximum size for the RAID
level that you set. Delete the existing value in the text box before typing
another value. When specifying the maximum size, click Update Size.
Note: When a drive group contains multiple disk arrays, specify the same
setting values on all disk arrays in the drive group.
Tip:
• When you configure a disk array to install an OS and put a value
larger than 2 TB, the OS can recognize up to 2 TB.
•
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.
11. One of the following windows appears.
– When you select Write Through in the write policy setting, the
following window appears. Click Yes.
– When you select Always Write Back in the write policy setting, the
following window appears. Click Yes.
4-48
MegaRAID WebBIOS for storage expansion blades
Hitachi Compute Blade 500 Series EFI User's Guide