Reconfiguring nodes using disk shelves for stand-alone operation

You can reconfigure the hardware to return to a single-controller configuration.

The HA pair software must be disabled.

  1. Halt both nodes by entering the following command on each console: halt
  2. Using the information you recorded earlier in the disk shelves or loops with mixed storage, physically move the disks to a disk shelf in a loop that belongs to the node that owns the disks. For example, if the disk is owned by Node B, move it to a disk shelf in a loop that is owned by Node B.
    Note: Alternatively, you can move the data on the disks using Snapshot technology rather than physically moving the disks. See the Data ONTAP Data Protection Online Backup and Recovery Guide for 7-Mode.

    After moving the data from the disk, you can zero the disk and use the disk remove_ownership command to erase the disk's ownership information. See the Data ONTAP Storage Management Guide for 7-Mode.

  3. If you are completely removing one node so that all the disk shelves belong to a single stand-alone node, complete the following substeps:
    1. Boot the node that you are removing into Maintenance mode as described in the Data ONTAP System Administration Guide for 7-Mode.
    2. Enter the following command to reassign all disk shelves so that they all belong to the remaining node:disk reassign [-o old_name | -s old_sysid] [-n new_name] -d new_sysid
    3. Halt the node by entering the following command:halt
  4. Turn off the power to each node, then turn off the power to the disk shelves and unplug them from the power source.
  5. Ground yourself, then remove the HA interconnect cables from both nodes. See the hardware documentation for your system for details.
  6. Move or remove the adapter used for the HA interconnect:
    If your system uses... Then...
    An HA interconnect adapter or an FC-VI adapter Remove the adapter from the system.
    An NVRAM5 or NVRAM6 adapter You might need to change the slot position of the adapter. See the Hardware Universe for details about expansion slot usage for the adapter.
  7. Recable the system, depending on the type of system:
    If you are converting a... Then...
    System with nonmirrored disks
    1. Disconnect all cabling from the Channel B loop on the local node.
    2. Repeat for the partner node.
    System with mirrored disks or a redundant Channel B loop
    1. Connect the local node to the open Channel B loop in its local disk shelves, as described in the appropriate disk shelf guide.
    2. Repeat for the partner node.
  8. Power on the disk shelves, then the individual nodes, monitoring the system console for error messages during the boot process.
  9. Run all system diagnostics at the boot prompt by entering the following command on the system console: boot_diags
  10. Unset the partner system ID by entering the following command at the prompt: unsetenv partner-sysid
  11. Boot the node by entering the following command: boot_ontap
  12. Check HA pair status by entering the following command: cf status If the HA pair is disabled, you see the following message:

    Non-HA mode.

  13. Repeat Step 1 through Step 12 for the partner node.