Replacing a fan

You can replace a failed fan nondisruptively in an NS224 drive shelf that is powered on, and while I/O is in progress.

Before you begin

About this task

You can use the following video or the written steps to replace a fan.

Steps

  1. Properly ground yourself.
  2. Disconnect the cabling from the NSM module that contains the FRU that you are replacing:
    1. Disconnect the power cord from the power supply by opening the power cord retainer, and then unplug the power cord from the power supply.
      Power supplies do not have a power switch.
    2. Disconnect the storage cabling from the NSM module ports.
      Make a note of the NSM module ports that each cable is connected to.You reconnect the cables to the same ports when you reinsert the NSM module, later in this procedure.
  3. Remove the NSM module from the shelf:
    1. Loop your index fingers through the finger holes of the latching mechanisms on either side of the NSM module.
      Note: If you are removing the bottom NSM module, and if the bottom rail is obstructing access to the latching mechanisms, place your index fingers through the finger holes from the inside (by crossing your arms).
    2. With your thumbs, press down and hold the orange tabs on top of the latching mechanisms.
      The latching mechanisms raise, clearing the latching pins on the shelf.
    3. Gently pull forward until the NSM module is about one third of the way out of the shelf, grasp the NSM module sides with both hands to support its weight, and then place it on a flat stable surface.
      When you begin pulling forward, the latching mechanism arms extend from the NSM module and lock in their fully extended position.
  4. Loosen the NSM module cover thumb screw and open the cover.
    Note: The FRU label on the NSM module cover shows the location of the five fans, along the rear wall of the NSM module.
  5. Physically identify the failed fan.
    When a fan fails, the system logs a warning message to the system console indicating which fan failed. Additionally, the fan attention (amber) LED, located on the board near the fan slot, illuminates.
    Note: The LED for the failed fan remains illuminated for 10 minutes after you remove the NSM module from the shelf.
  6. Replace the failed fan:
    1. Remove the failed fan by firmly grasping the sides, where the blue touch points are located, and then lift it vertically to disconnect it from the socket.
    2. Insert the replacement fan by aligning it within the guides, and then push down until the fan module connector is fully seated in the socket.
  7. Close the NSM module cover, and then tighten the thumb screw.
  8. Reinsert the NSM module into the shelf:
    1. Make sure that the latching mechanism arms are locked in the fully extended position.
    2. Using both hands, gently slide the NSM module into the shelf until the weight of the NSM module is fully supported by the shelf.
    3. Push the NSM module into the shelf until it stops (about half an inch from the back of the shelf).
      You can place your thumbs on the orange tabs on the front of each finger loop (of the latching mechanism arms) to push in the NSM module.
    4. Loop your index fingers through the finger holes of the latching mechanisms on either side of the NSM module.
      Note: If you are inserting the bottom NSM module, and if the bottom rail is obstructing access to the latching mechanisms, place your index fingers through the finger holes from the inside (by crossing your arms).
    5. With your thumbs, press down and hold the orange tabs on top of the latching mechanisms.
    6. Gently push forward to get the latches over the stop.
    7. Release your thumbs from the tops of the latching mechanisms, and then continue pushing until the latching mechanisms snap into place.
      The NSM module should be fully inserted into the shelf and flush with the edges of the shelf.
  9. Reconnect the cabling to the NSM module:
    1. Reconnect the storage cabling to the same two NSM module ports.
      Cables are inserted with the connector pull-tab facing up. When a cable is inserted correctly, it clicks into place.
    2. Reconnect the power cord to the power supply, and then secure the power cord with the power cord retainer.
      When functioning correctly, a power supply's bicolored LED illuminates green.

      Additionally, both NSM module port LNK (green) LEDs illuminate. If a LNK LED does not illuminate, reseat the cable.

  10. Verify that the attention (amber) LEDs on the NSM module containing the failed fan and the shelf operator display panel are no longer illuminated.
    When the replacement fan reaches its expected RPM speed, the attention LEDs turn off.
  11. Verify that the NSM module is cabled correctly.
    You can download and run Active IQ Config Advisor to verify cabling. If any cabling errors are generated, follow the corrective actions provided.

    NetApp Downloads: Config Advisor