Hitachi Compute Blade 2000, Руководство пользователя

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193
5
Server B
lad
e S
etup
Display item What is displayed Setting/display value **
A RAID Level RAID level -
Status Status of the disk array -
Capacity Size of the disk array -
Strip Size Stripe size of the disk array -
B Access *1 Access mode [RW (reading and writing)] /
Read Only (reading only) /
Blocked (access denied)
C Read Read policy [Normal (no advance reading)] / Ahead
(always advance reading) / Adaptive
(advance reading only in the event of
sequential access)
D Default Write
*2 *3
Setting the write cache [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.)
E Disable BGI *1 Setting the background
initializing
No (background initializing valid) / [Yes
(background initializing invalid)]
F Disk Cache *1 Setting the cache installed
in a physical hard disk
[Disable (cache: not used)] /
[Enable (cache: used) /
No change (based on the hard disk setting)]
G I/O *1 Setting the read-cache
operation
[Direct (reading from the cache at a cache
hit)] /
[Cached (always reading from the cache)]
*1 Make sure to set the default value or recommended value to use this item.
*2 Default Write supports setting in Always Write Back only when the system equipment is
connected to an uninterruptible power supply (UPS). Even so, set Write through when installing
OS because the installation might not finish properly.
*3 Do not select Write Back with BBU .
NOTICE
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.