Recable the system and reassign disks - AFF A320

Contributors thrisun netapp-martyh

Continue the replacement procedure by recabling the storage and confirming disk reassignment.

Step 1: Recable the system

After running diagnostics, you must recable the controller module’s storage and network connections.

Steps
  1. Recable the system.

  2. Verify that the cabling is correct by using Active IQ Config Advisor.

    1. Download and install Config Advisor.

    2. Enter the information for the target system, and then click Collect Data.

    3. Click the Cabling tab, and then examine the output. Make sure that all disk shelves are displayed and all disks appear in the output, correcting any cabling issues you find.

    4. Check other cabling by clicking the appropriate tab, and then examining the output from Config Advisor.

Step 2: Reassign disks

If the storage system is in an HA pair, the system ID of the new controller module is automatically assigned to the disks when the giveback occurs at the end of the procedure. You must confirm the system ID change when you boot the replacement node and then verify that the change was implemented.

This procedure applies only to systems running ONTAP in an HA pair.

  1. If the replacement node is in Maintenance mode (showing the *> prompt, exit Maintenance mode and go to the LOADER prompt: halt

  2. From the LOADER prompt on the replacement node, boot the node, entering y if you are prompted to override the system ID due to a system ID mismatch:boot_ontap

  3. Wait until the Waiting for giveback…​ message is displayed on the replacement node console and then, from the healthy node, verify that the new partner system ID has been automatically assigned: storage failover show

    In the command output, you should see a message that the system ID has changed on the impaired node, showing the correct old and new IDs. In the following example, node2 has undergone replacement and has a new system ID of 151759706.

    node1> storage failover show
                                        Takeover
    Node              Partner           Possible     State Description
    ------------      ------------      --------     -------------------------------------
    node1             node2             false        System ID changed on partner (Old:
                                                      151759755, New: 151759706), In takeover
    node2             node1             -            Waiting for giveback (HA mailboxes)
  4. From the healthy node, verify that any coredumps are saved:

    1. Change to the advanced privilege level: set -privilege advanced

      You can respond Y when prompted to continue into advanced mode. The advanced mode prompt appears (*>).

    2. Save any coredumps: system node run -node local-node-name partner savecore

    3. Wait for savecore command to complete before issuing the giveback.

      You can enter the following command to monitor the progress of the savecore command: system node run -node local-node-name partner savecore -s

    4. Return to the admin privilege level: set -privilege admin

  5. Give back the node:

    1. From the healthy node, give back the replaced node’s storage: storage failover giveback -ofnode replacement_node_name

      the replacement node takes back its storage and completes booting.

      If you are prompted to override the system ID due to a system ID mismatch, you should enter y.

      Note If the giveback is vetoed, you can consider overriding the vetoes.
    2. After the giveback has been completed, confirm that the HA pair is healthy and that takeover is possible: storage failover show

      The output from the storage failover show command. should not include the System ID changed on partner message.

  6. Verify that the disks were assigned correctly: storage disk show -ownership

    The disks belonging to the replacement node should show the new system ID. In the following example, the disks owned by node1 now show the new system ID, 1873775277:

    node1> storage disk show -ownership
    
    Disk  Aggregate Home  Owner  DR Home  Home ID    Owner ID  DR Home ID Reserver  Pool
    ----- ------    ----- ------ -------- -------    -------    -------  ---------  ---
    1.0.0  aggr0_1  node1 node1  -        1873775277 1873775277  -       1873775277 Pool0
    1.0.1  aggr0_1  node1 node1           1873775277 1873775277  -       1873775277 Pool0
    .
    .
    .
  7. Verify that the expected volumes are present for each node: vol show -node node-name

  8. If you disabled automatic takeover on reboot, enable it from the healthy node: storage failover modify -node replacement-node-name -onreboot true