Redundant:

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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