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Install and maintain

Hot-swap a power supply - NS224 shelves

Contributors netapp-ivanad netapp-martyh netapp-lisa
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You can replace a failed power supply nondisruptively in an NS224 drive shelf that is powered on, and while I/O is in progress.

About this task

  • Do not mix power supplies with different efficiency ratings or with different input types.

    Always replace like for like.

  • If you are replacing more than one power supply, you must do so one at a time so that the shelf maintains power.

  • Best practice: The best practice is to replace the power supply within two minutes of removal from the NSM.

    If you exceed the two minutes, the shelf continues to function, but ONTAP sends messages to the console about the degraded power supply until the power supply is replaced.

  • Do not revert firmware to a version that does not support your shelf and its components.

  • If needed, you can turn on the shelf's location (blue) LEDs to aid in physically locating the affected shelf: storage shelf location-led modify -shelf-name shelf_name -led-status on

    If you do not know the shelf_name of the affected shelf, run the storage shelf show command.

    A shelf has three location LEDs: one on the operator display panel and one on each NSM. Location LEDs remain illuminated for 30 minutes. You can turn them off by entering the same command, but using the off option.

  • When you unpack the replacement power supply, save all packing materials for use when you return the failed power supply.

    If you need the RMA number or additional help with the replacement procedure, contact technical support at NetApp Support, 888-463-8277 (North America), 00-800-44-638277 (Europe), or +800-800-80-800 (Asia/Pacific).

  • If you are replacing an AC power supply for an NS224 shelf with NSM100 modules, you can watch the following animation to familiarize yourself with the procedure before beginning.

    Replace AC power supply for NS224 with NSM100 modules
    Hot-swap a power supply in an NS224 shelf

Use the appropriate procedure for your type of PSU: AC or DC.

Option 1: Replace an AC power supply

Complete the following steps to replace an AC power supply.

Steps

  1. Properly ground yourself.

  2. Physically identify the failed power supply.

    The system logs a warning message to the system console indicating which power supply failed. Additionally, the attention (amber) LED on the shelf operator display panel illuminates and the bicolored LED on the failed power supply illuminates red.

  3. 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.

  4. Remove the power supply:

    Remove a AC PSU

    Callout number 1

    Rotate the handle up, to its horizontal position, and then grasp it.

    Callout number 2

    With your thumb, press the blue tab to release the locking mechanism.

    Callout number 3

    Pull the power supply out of the NSM while using your other hand to support its weight.

  5. Insert the replacement power supply:

    1. Using both hands, support and align the edges of the power supply with the opening in the NSM.

    2. Gently push the power supply into the NSM until the locking mechanism clicks into place.

      Note Do not use excessive force or you might damage the internal connector.

    3. Rotate the handle down, so it is out of the way of normal operations.

  6. Connect the power cord to the power supply and secure the power cord with the power cord retainer.

    When functioning correctly, a power supply's bicolored LED illuminates green.

Option 2: Replace a DC power supply

To replace a DC power supply, complete the following steps.

  1. Properly ground yourself.

  2. Physically identify the failed power supply.

    The system logs a warning message to the system console indicating which power supply failed. Additionally, the attention (amber) LED on the shelf operator display panel illuminates and the bicolored LED on the failed power supply illuminates red.

  3. Disconnect the power supply:

    1. Unscrew the two thumb screws on the D-SUB DC power cable connector.

      The illustration and table in step 4 shows the two thumb screws (item #1) and the D-SUB DC power cable connector (item #2).

    2. Unplug the D-SUB DC power cable connector from the power supply and set it aside.

  4. Remove the power supply:

    1. Rotate the handle up, to its horizontal position, and then grasp it.

    2. With your thumb, press the terra-cotta tab to release the locking mechanism.

    3. Pull the power supply out of the NSM while using your other hand to support its weight.

      Note The power supply is short. Always use two hands to support it when removing it from the NSM so that it does not swing free from the NSM and injure you.
      Remove a DC PSU

      Callout number 1

      Thumb screws

      Callout number 2

      D-SUB DC power cable connector

      Callout number 3

      Power supply handle

      Callout number 4

      Blue/Terra cotta power supply locking tab

  5. Insert the replacement power supply:

    1. Using both hands, support and align the edges of the power supply with the opening in the NSM.

    2. Gently push the power supply into the NSM until the locking mechanism clicks into place.

      A power supply must properly engage with the internal connector and locking mechanism. Repeat this step if you feel the power supply is not properly seated.

      Note Do not use excessive force or you might damage the internal connector.

    3. Rotate the handle down, so it is out of the way of normal operations.

  6. Reconnect the D-SUB DC power cable:

    Once power is restored to the power supply, the status LED should be green.

    1. Plug the D-SUB DC power cable connector into the power supply.

    2. Tighten the two thumb screws to secure the D-SUB DC power cable connector to the power supply.