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Converting a Dual Controller Array to a Single Controller Array

If one controller fails in a dual array controller configuration, you might want to run a single controller for an extended period of time so that the array does not display as degraded in the console.

  1. Make sure you know the serial number of the controller being removed.

    You can check the event log for the failed controller's serial number, or check the console and make a note of the primary controller's serial number.

  2. Change the remaining controller's redundancy setting to disabled.

    You must use the firmware application to disable redundancy on the controller. Refer to the Sun StorEdge 3000 Family RAID Firmware User's Guide for your array for information about accessing the firmware, and then from the Main Menu, choose view and edit Peripheral devices > Set Peripheral Device Entry > Select Redundancy Controller - Primary.

  3. Stop the Sun StorEdge Configuration Service Agent as explained in the installation chapter for your operating system in the Sun StorEdge 3000 Family Configuration Service User's Guide for your array.

  4. Change to /var/opt/SUNWsscs/ssagent and edit the file sscontlr.txt.

    The very last line in the file contains the serial numbers of both controllers. Remove the failed controller's serial number from this line.

            # RAID_CONTROLLER=Enable:3197861:3179746
            
  5. Start the Sun StorEdge Configuration Service Agent as explained in the installation chapter for your operating system in the Sun StorEdge 3000 Family Configuration Service User's Guide for your array.

  6. Rescan the console if it was open during this procedure.

  7. In a single-controller configuration, to avoid the possibility of data corruption, disable Write Back Cache.

    See Changing Controller Parameters - Cache Tab for information on disabling Write Back Cache.

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