NEC EXPRESS5800 User Manual page 28

Global Settings tab
The Global Settings tab allows you to provide settings on write and read caches for all physical
drives.
IMPORTANT:
BBM tab
The BBM (Bad Block Mapping) tab allows you to check bad blocks in all physical drives.
Detecting an irreparable block in a physical drive, WebPAM PRO registers the information in
this list.
"SATA Drive Settings" is not supported.
The write cache option is provided for HDDs and
different from the cache on the disk array controller.
For the setting of write cache for logical drives in
battery installation, see the description of setting write
cache for each logical drive in "3.6.5 Logical Drive."
It is recommended to set write cache for HDDs to
[Disable] (no check). If you feel poor performance of
HDDs, take proper measures for preventing
instantaneous power interruption including use of an
uninterruptible power supply (UPS) and set the write
cache to [Enable] (checking).
Even if you change the following settings, they return
to the default values after restarting the system.
- Enable Write Cache
- Enable Read Lock Ahead Cache
- Enable Command Queuing
- Enable Read Cache
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