Hitachi Compute Blade 2000 User Manual page 254

*1 RAID 6 with three hard disks is not supported.
*2 For RAID 1, set 64 KB by Default.
*3 Always use the Default or recommended value for Access Policy.
*4 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
*5 Do not select Write Back with BBU.
*6 Change from the Default value to the recommended value.
*7 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.
Maximum capacity value under the RAID 0 setting: 408.656 GB
Maximum capacity value under the RAID 5 setting: 272.437 GB
Maximum capacity value under the RAID 6 setting: 136.218 GB
*8 Do not change the unit of Select Size: always GB by Default.
When enabling the write cache of the disk array, connect the system equipment
to UPS. When you use the equipment without connecting to the UPS, data can
disappear and be corrupted.
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.
Changing the write policy for disk
NOTICE
203
arrays.