Hitachi Compute Blade 2000 User Manual page 264

*1 Always use it in the default or recommended value.
*2 In Write Policy, Always Write Back can be set only when the system equipment is already
connected to the UPS (uninterruptible power supply). 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
*3 Do not select Write Back with BBU.
*4 Change from the default value to the recommended value.
*5 Keep the existing maximum capacity value in Select Size.
*6 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 a 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
213
arrays.