This option is only available
for redundant controller subsystems. To access the redundant controller settings,
click the Redundant tab under the Configuration Parameters
panel.
Redundant Controller
Communication Channel: this field is set to display only the type of
communication channel used internally between the redundant controllers.
Seccondary Controller RS-232 Terminal: In a redundant controller
configuration, the RS-232C port on the secondary controller is normally nonfunctional.
Enable this function if you wish to use the port on a secondary controller for
debug purpose.
Periodic Cache Flash Time: If controllers are operating using
the Write-Through caching mode, the synchronized cache operation can be manually
disabled to save the system resources spent on mirroring cached data. Disabling
the synchronization cache may help bring a better performance.
If the synchronization cache is disabled, the configuration changes made through
the primary controller is still communicated to the secondary controller.
Adaptive Write Policy: This option allows temporary switch
between two caching modes when dealing with I/Os of different characteristics.
With redundant controllers serving sequential writes, write-back policy is temporarily
switched to write-through.
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