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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. Workflow diagram
    This diagram shows the workflow of the caching module replacement procedure for a system.
  2. Shutting down the degraded controller
    You can shut down or take over the degraded controller using different procedures, depending on the storage system hardware configuration.
  3. Opening the system
    To access components inside the controller, you must first remove the controller module from the system and then remove the cover on the controller module.
  4. Replacing a caching module
    To replace a caching module referred to as the M.2 PCIe card on the label on your controller, locate the slot inside the controller and follow the specific sequence of steps.
  5. Reinstalling the controller module
    After you replace components in the controller module, reinstall it into the chassis.
  6. Running system-level diagnostics
    After installing a new caching module, you should run diagnostics.
  7. 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.