DataDirect Networks EF2800, Руководство пользователя

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DataDirect Networks EF2800 FC RAID Storage System User Guide (V 1.0)
311
H.7 Locking the Cache Setting
You can prevent host systems from using SCSI mode-select commands
to change the EF2800 system’s write-back cache setting. Some
operating systems disable write cache. If cache lock is enabled, the host
cannot modify the cache setting. The default setting is disabled.
This option is useful in some environments where the host system
disables the SM module’s write-back cache, resulting in degraded
performance. A change to this setting on either SM module is
automatically updated on the other SM module.
To lock the cache setting:
1.
From the System Menu, select
Configuration Menu
and press
< Enter>. The Configuration Menu displays.
2.
Select
Option Configuration
and press < Enter>. The Option
Configuration screen displays
(Figure 169)
.
3.
Select
Cache Lock
and press < Enter>. The Cache Lock screen
displays
(Figure 170)
. The current setting is marked with an * next
to it.
4.
Select the option you want and press
<
Enter>.
Figure 169. Option Configuration Menu
Figure 170. Cache Lock Menu