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Install and maintain

Replace DIMM - ASA A800

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You must replace a DIMM in the controller when your storage system encounters errors such as, excessive CECC (Correctable Error Correction Codes) errors that are based on Health Monitor alerts or uncorrectable ECC errors, typically caused by a single DIMM failure preventing the storage system from booting ONTAP.

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.

Step 1: Shut down the impaired controller

To shut down the impaired controller, you must determine the status of the controller and, if necessary, take over the controller so that the healthy controller continues to serve data from the impaired controller storage.

About this task

  • If you have a SAN system, you must have checked event messages (cluster kernel-service show) for the impaired controller SCSI blade. The cluster kernel-service show command (from priv advanced mode) displays the node name, quorum status of that node, availability status of that node, and operational status of that node.

    Each SCSI-blade process should be in quorum with the other nodes in the cluster. Any issues must be resolved before you proceed with the replacement.

  • If you have a cluster with more than two nodes, it must be in quorum. If the cluster is not in quorum or a healthy controller shows false for eligibility and health, you must correct the issue before shutting down the impaired controller; see Synchronize a node with the cluster.

Steps

  1. If AutoSupport is enabled, suppress automatic case creation by invoking an AutoSupport message:

    system node autosupport invoke -node * -type all -message MAINT=<# of hours>h

    The following AutoSupport message suppresses automatic case creation for two hours:

    cluster1:> system node autosupport invoke -node * -type all -message MAINT=2h

  2. Disable automatic giveback:

    1. Enter the following command from the console of the healthy controller:

      storage failover modify -node local -auto-giveback false

    2. Enter y when you see the prompt Do you want to disable auto-giveback?

  3. Take the impaired controller to the LOADER prompt:

    If the impaired controller is displaying…​ Then…​

    The LOADER prompt

    Go to the next step.

    Waiting for giveback…​

    Press Ctrl-C, and then respond y when prompted.

    System prompt or password prompt

    Take over or halt the impaired controller from the healthy controller:

    storage failover takeover -ofnode impaired_node_name -halt true

    The -halt true parameter brings you to the LOADER prompt.

Step 2: Remove the controller module

You must remove the controller module from the chassis when you replace the controller module or replace a component inside the controller module.

  1. If you are not already grounded, properly ground yourself.

  2. Ensure that all drives in the chassis are firmly seated against the midplane by using your thumbs to push each drive until you feel a positive stop.

    Seat disk drives

  3. Unplug the controller module power supplies from the source.

  4. Release the power cable retainers, and then unplug the cables from the power supplies.

  5. Loosen the hook and loop strap binding the cables to the cable management device, and then unplug the system cables and SFP and QSFP modules (if needed) from the controller module, keeping track of where the cables were connected.

    Leave the cables in the cable management device so that when you reinstall the cable management device, the cables are organized.

  6. Remove the cable management device from the controller module and set it aside.

  7. Press down on both of the locking latches, and then rotate both latches downward at the same time.

    The controller module moves slightly out of the chassis.

    Releasing the controller module

    Callout number 1

    Locking latch

    Callout number 2

    Locking pin

  8. Slide the controller module out of the chassis.

    Make sure that you support the bottom of the controller module as you slide it out of the chassis.

  9. Place the controller module on a stable, flat surface, and then open the air duct:

    1. Press in the locking tabs on the sides of the air duct toward the middle of the controller module.

    2. Slide the air duct toward the fan modules, and then rotate it upward to its completely open position.

      Open the air duct

      Callout number 1

      Air duct locking tabs

      Callout number 2

      Slide air duct towards fan modules

      Callout number 3

      Rotate air duct towards fan modules

Step 3: Replace 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 and then replace it following the specific sequence of steps.

  1. When removing a DIMM, unlock the locking latch on the applicable riser, and then remove the riser.

    Replace a DIMM

    Callout number 1

    Air duct cover

    Callout number 2

    Riser 1 and DIMM bank 1, and 3-6

    Riser 2 and DIMM bank 7-10, 12-13, and 15-18

    Riser 3 and DIMM 19 -22 and 24

    Note: Slot 2 and 14 are left empty. Do not attempt to install DIMMs into these slots.

  2. Note the orientation of the DIMM in the socket so that you can insert the replacement DIMM in the proper orientation.

  3. Eject the DIMM from its slot by slowly pushing apart the two DIMM ejector tabs on either side of the DIMM, and then slide the DIMM out of the slot.

    Note Carefully hold the DIMM by the edges to avoid pressure on the components on the DIMM circuit board.

  4. Remove the replacement DIMM from the antistatic shipping bag, hold the DIMM by the corners, and align it to the slot.

    The notch among the pins on the DIMM should line up with the tab in the socket.

  5. Insert the DIMM squarely into the slot.

    The DIMM fits tightly in the slot, but should go in easily. If not, realign the DIMM with the slot and reinsert it.

    Note Visually inspect the DIMM to verify that it is evenly aligned and fully inserted into the slot.

  6. Push carefully, but firmly, on the top edge of the DIMM until the ejector tabs snap into place over the notches at the ends of the DIMM.

  7. Reinstall any risers that you removed from the controller module.

  8. Close the air duct.

Step 4: Reinstall the controller module and booting the system

After you replace a FRU in the controller module, you must reinstall the controller module and reboot it.

  1. If you have not already done so, close the air duct:

    1. Swing the air duct all the way down to the controller module.

    2. Slide the air duct toward the risers until the locking tabs click into place.

    3. Inspect the air duct to make sure that it is properly seated and locked into place.

      Closing the air duct

      Callout number 1

      Locking tabs

      Callout number 2

      Slide plunger

  2. Align the end of the controller module with the opening in the chassis, and then gently push the controller module halfway into the system.

    Note Do not completely insert the controller module in the chassis until instructed to do so.

  3. Recable the system, as needed.

    If you removed the media converters (QSFPs or SFPs), remember to reinstall them if you are using fiber optic cables.

  4. Complete the reinstallation of the controller module:

    1. Firmly push the controller module into the chassis until it meets the midplane and is fully seated.

      The locking latches rise when the controller module is fully seated.

      Note Do not use excessive force when sliding the controller module into the chassis to avoid damaging the connectors.

    2. Rotate the locking latches upward, tilting them so that they clear the locking pins, and then lower them into the locked position.

    3. Plug the power cords into the power supplies, reinstall the power cable locking collar, and then connect the power supplies to the power source.

      The controller module begins to boot as soon as power is restored. Be prepared to interrupt the boot process.

    4. If you have not already done so, reinstall the cable management device.

Step 5: Return the failed part to NetApp

Return the failed part to NetApp, as described in the RMA instructions shipped with the kit. See the Part Return and Replacements page for further information.