Hitachi Compute Blade 2000, User Manual

Page: 397 / 1927

346
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 -
Strip Size Stripe size of the disk array -
Capacity Size of the disk array -
Parity Size *1 Size of the parity -
B Access 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 Disk Cache Setting the cache installed
in a physical hard disk
[Disable (cache: not used)] /
[Enable (cache: used) /
Unchanged (based on the hard disk
setting)]
E I/O Setting the read-cache
operation
[Direct (reading from the cache at a cache
hit)] /
[Cached (always reading from the cache)]
F Disable BGI Setting the background
initializing
No (background initializing valid) / [Yes
(background initializing invalid)]
G Default Write
*2 *3
Setting the write cache Without cache backup module installed * 4:
[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.)
With cache backup module installed * 5:
Write Through (write-cache invalid)/ Always
Write Back (write-cache valid) /[Write Back
With BBU (Write cache is valid only when a
cache backup module is installed.)]
*1 This item is shown with RAID Level 5 or 6.
*2
Default Write supports setting in Always Write Back only when the system equipment without a
cache backup module installed is connected to UPS. Even so, set Write through when installing
OS. Otherwise, the installation may not finish properly. Do not set Write Back with BBU .
*3 For the equipment with a cache backup module installed, make sure to set Write Back With BBU
for Default Write. If not, write performance may slow down.
*4 None is shown for Battery Backup in Properties: Controller properties submenu 2 .
*5 Present is shown for Battery Backup in Properties: Controller properties submenu 2.