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Replacing a DIMM

You must replace a DIMM in the controller module when your system registers an increasing number of correctable error correction codes (ECC); failure to do so causes a system panic.

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
    You must remove the controller module from the chassis when you replace a component inside the controller module.
  3. Replacing a DIMM
    To replace a DIMM, you must locate it in the controller module using the DIMM map label on top of the air duct or locating it using the LED next to the DIMM, and then replace it following the specific sequence of steps.
  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.