DataDirect Networks EF2800, User Manual

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
O t h e r E F 2 8 0 0 C o n f i g u r a t i o n s
8.6 Controlling Host Access to EF2800’s Write-back
Cache Setting
You can prevent host systems from using SCSI mode-select commands
to change the EF2800’s write-back cache setting. Some operating
systems disable write cache. If cache lock is enabled, the host cannot
change the cache setting. The default setting is disabled.
This option is useful in some environments where the host system
disables the EF2800’s write-back cache, resulting in degraded
performance.
To lock the cache setting:
1. From SAM, select
Manage EF2800
>
General Config
>
Option
Configuration
. The Option Configuration page displays.
2. Select the Host Control of Write-back Cache option you want.
3. Click
Change Options
.
8.7 Enabling and Disabling the Battery
If you are not using a battery in your EF2800, the system alarm will be
activated. To eliminate the alarm, you can disable the battery. The
default setting is “battery enabled”.
Notes :
•
You should only disable the battery if you are running the EF2800
with an Uninterruptible power supply (UPS), so that you will not
lose power to the EF2800
.
•
If you disable the battery, the EF2800 will not give any warnings,
nor will it disable the write-back cache
.
•
If you change this setting, you must restart the EF2800 for the
change to take effect
.