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Replacing the caching module

You must replace the caching module in the controller module when your system registers a single AutoSupport (ASUP) message that the module has gone offline; failure to do so results in performance degradation.

Before you begin

All other components in the system must be functioning properly; if not, you must contact technical support.

You must replace the failed component with a replacement FRU component you received from your provider.

  1. Shutting down the impaired controller
    You can shut down or take over the impaired controller using different procedures, depending on the storage system hardware configuration.
  2. Removing the controller module
    To access components inside the controller module, you must remove the controller module from the chassis.
  3. Replacing a caching module
    To replace a caching module, referred to as the Flash Cache on the label on your controller, locate the slot inside the controller and follow the specific sequence of steps. See the FRU map on the controller module for the location of the Flash Cache.
  4. Installing the controller module
    After you have replaced the component in the controller module, you must re-install the controller module into the chassis, and then boot it to Maintenance mode.
  5. Running diagnostics
    After you have replaced a component in your system, you should run diagnostic tests on that component.
  6. Completing the replacement process
    After you replace the part, you can return the failed part to Lenovo, as described in the RMA instructions shipped with the kit. Contact technical support at Lenovo Data Center Support if you need the RMA number or additional help with the replacement procedure.