Hitachi Compute Blade 2000, User Manual

Page: 334 / 1927

283
5
Server B
lad
e S
etup
Set each item value in the following table.
Item Content Setting value **
RAID Level *1 RAID Level Specify any level.
Stripe Size *2 Stripe size
(only RAID 0 and 5) 8 KB / 16 KB / 32 KB / [64 KB] / 128 KB / 256 KB /
512 KB / 1 MB
Access Policy Access policy [RW (reading and writing)] /
Read Only (reading only) /
Blocked (access denied)
Read Policy Read policy [Normal (no advance reading)] /
Ahead (always advance reading) /
Adaptive (advance reading only in the event of
sequential access)
Write Policy *3 Write policy [Write Through (write cache invalid)] /
Always Write Back (write-cache valid) /
Write Back with BBU (Write cache is valid only when
the battery is installed.)
IO Policy Read-cache operation [Direct (reading from the cache at a cache hit)] /
Cached (always reading from the cache)
Drive Cache Setting the hard disk
cache
[Disable (setting invalid)] / Enable (setting valid) /
No change (depending on the hard disk setting)
Disable BGI Setting the background
initializing
No (background initializing valid) /
[Yes (background initializing invalid)]
Select Size *4 *5 Size of a disk array Entering the maximum capacity value.
*1 RAID 6 with three hard disks and RAID 1 with three or more hard disks are not
supported.
*2 For RAID 1, set 64 KB by Default.
*3 In Write Policy,
Write Back can be set only when the system equipment is already
connected to the UPS (uninterruptible power supply). Confirm that the checkmark is
removed from Wrthru for BAD BBU at that time. Even in this case, set Write
Through when the operating system is installed. Otherwise, installation may not be
properly completed. Change the setting after installing the OS referring to Changing
the write policy for disk arrays . Do not select Write Back with BBU .
*4 Maximum capacity size that can be set is shown under Next LD, Possible RAID
Levels at the right of the screen. Change the maximum capacity value for your RAID
level. Type the fraction portion of the maximum capacity value correctly and do not
omit the value 0 (zero).
*5 For
firmware version: 2.120.233-1474
or later
, clicking Update Size inputs the
maximum capacity at the RAID level specified in RAID Level.

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” appears
on the screen and all the setting items are
initialized. You need to set all items again
including the correct size.