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Changing the disk shelf ID

Before you begin

  • Ensure that the shelf is a new one with no active aggregates. Changing a shelf ID is a disruptive action on an existing shelf.

  • You can verify shelf IDs already in use in your system by running the storage shelf show -fields shelf-id command.

About this task

  • A valid shelf ID is 00 through 99.
  • Shelf IDs must be unique within an HA pair.

    If you have a platform with internal storage, shelf IDs must be unique across the internal disk shelf and any externally attached disk shelves.

  • In order for a changed shelf ID to take effect, you must power cycle the disk shelf.
  1. Turn on the power to the disk shelf if it is not already on.
  2. Remove the left end cap to locate the button near the shelf LEDs.
  3. Change the first number of the shelf ID by pressing and holding the orange button until the first number on the digital display blinks, which can take up to three seconds.
    Note
    If the ID takes longer than three seconds to blink, press the button again, making sure to press it in all the way.
    This activates the disk shelf ID programming mode.
  4. Press the button to advance the number until you reach the desired number from 0 to 9.
    The first number continues to blink.
  5. Change the second number of the shelf ID by pressing and holding the button until the second number on the digital display blinks, which can take up to three seconds.
    The first number on the digital display stops blinking.
  6. Press the button to advance the number until you reach the desired number from 1 to 9.
    The second number continues to blink.
  7. Lock in the desired number and exit the programming mode by pressing and holding the button until the second number stops blinking, which can take up to three seconds.
    Both numbers on the digital display start blinking and the amber LED on the operator display panel illuminates after about five seconds, alerting you that the pending disk shelf ID has not yet taken effect.
  8. Power cycle the disk shelf to make the shelf ID take effect.
    Note

    • If ONTAP is not yet running, wait at least 10 seconds before turning the power back on to complete the power cycle.

    • If ONTAP is running (controllers are available to serve data), you must wait at least 70 seconds before turning the power back on to complete the power cycle. This time allows ONTAP to properly delete the old disk shelf address and update the copy of the new disk shelf address.

  9. Replace the left end cap.
  10. Repeat Steps 1 through 9 for each additional disk shelf.
  11. If you manually assigned shelf IDs, verify that your system does not have duplicate shelf IDs.

    When two or more disk shelves have the same ID, the system assigns the duplicate disk shelf a soft ID number equal to or greater than 100. You must change the soft ID (duplicate) number.

    1. Run the storage shelf show -fields shelf-id command to see a list of shelf IDs already in use including any duplicate IDs.
    2. If your system has any duplicate shelf IDs, change the duplicate shelf IDs by repeating this procedure.