Set drive to defunct: controller [number], <device location>


One of the following occurred:

Note: (Clustering and failover environments only) If you move a logical drive to another controller, these entries might be normal.


  1. Verify that there is power to external enclosures and connections.
  2. Verify that cables are properly seated.
  3. Check for damaged, bent, or pushed pins on the following:

If you cannot identify a connection problem, the replacement order for parts is the following:

  1. Termination (for non-backplane systems)
  2. Cables
  3. Physical drives
  4. Backplanes
  5. Controller

Before replacing a physical drive or controller, verify that it is updated with the latest firmware (microcode) and that they still fail.

Note: If multiple physical drives are marked defunct within the same time period, check the cables and backplanes.

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