How to Remove a Logical Volume

Use this procedure to remove a logical volume. This procedure assumes all nodes are booted and are connected to the storage array. This storage array hosts the logical volume that you are removing.

This procedure defines Node A as the node with which you begin working. Node B is the remaining node.

If you need to remove a storage array from more than two nodes, repeat Step 9 through Step 12 for each additional node. Each node connects to the logical volume.

During this procedure, you lose access to the data that resides on the logical volume that you are removing.

This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS.

Before You Begin

To perform this procedure, become superuser or assume a role that provides solaris.cluster.modify RBAC authorization.

1. If necessary, back up all data. Migrate all resource groups and disk device groups to another node.

2. If the logical volume that you plan to remove is configured as a quorum device, choose and configure another device to be the new quorum device. Then remove the old quorum device.

   To determine whether this logical volume is configured as a quorum device, use one of the following commands.

   • If you are using Sun Cluster 3.2, use the following command:

     #clquorum show

   • If you are using Sun Cluster 3.1, use the following command:

     #scstat -q

   For procedures about how to add and remove quorum devices, see your Sun Cluster system administration documentation.

3. Run the appropriate Solaris Volume Manager commands or Veritas Volume Manager commands to remove the reference to the logical volume from any diskset or disk group.

   For more information, see your Solaris Volume Manager or Veritas Volume Manager documentation.

4. If the cluster is running Veritas Volume Manager, update the list of devices on all nodes. These nodes are attached to the logical volume that you are removing.

   See your Veritas Volume Manager documentation for information about how to use the vxdisk rm command to remove devices (volumes) in your Veritas Volume Manager device list.

5. Remove the logical volume.

   Contact your service provider to remove the logical volume.

6. Determine the resource groups and device groups that are running on Node A and Node B.

   Record this information because you use this information in Step 11 and Step 12 of this procedure to return resource groups and device groups to these nodes.

   • If you are using Sun Cluster 3.2, use the following commands:

     # clresourcegroup status -n NodeA[ NodeB ...] # cldevicegroup status -n NodeA[ NodeB ...]

     -n NodeA[ NodeB…]

     The node or nodes for which you are determining resource groups and device groups.

   • If you are using Sun Cluster 3.1, use the following command:

     # scstat

7. Shut down and reboot Node A by using the shutdown command with the -i6 option.

   For the procedure about how to shut down and power off a node, see your Sun Cluster system administration documentation.

8. On Node A, update the /devices and /dev entries.

   • If you are using Sun Cluster 3.2, use the following commands:

     # devfsadm -C # cldevice clear

   • If you are using Sun Cluster 3.1, use the following commands:

     # devfsadm -C # scdidadm -C

9. Shut down and reboot Node B by using the shutdown command with the -i6 option.

   For the procedure about how to shut down and power off a node, see Chapter 3, Shutting Down and Booting a Cluster, in Sun Cluster System Administration Guide for Solaris OS.

10. On Node B, update the /devices and /dev entries.

    • If you are using Sun Cluster 3.2, use the following commands:

      # devfsadm -C # cldevice clear

    • If you are using Sun Cluster 3.1, use the following commands:

      # devfsadm -C # scdidadm -C

11. (Optional) Restore the device groups to the original node.

    Perform the following step for each device group you want to return to the original node.

    • If you are using Sun Cluster 3.2, use the following command:

      # cldevicegroup switch -n nodename devicegroup1[ devicegroup2 ...]

      -n nodename

      The node to which you are restoring device groups.

      devicegroup1[ devicegroup2 …]

      The device group or groups that you are restoring to the node.

    • If you are using Sun Cluster 3.1, use the following command:

      # scswitch -z -D devicegroup -h nodename

12. (Optional) Restore the resource groups to the original node.

    Perform the following step for each resource group you want to return to the original node.

    • If you are using Sun Cluster 3.2, use the following command:

      # clresourcegroup switch -n nodename resourcegroup1[ resourcegroup2 …]

      nodename

      For failover resource groups, the node to which the groups are returned. For scalable resource groups, the node list to which the groups are restored.

      resourcegroup1[ resourcegroup2 …]

      The resource group or groups that you are restoring to the node or nodes.

    • If you are using Sun Cluster 3.1, use the following command:

      # scswitch -z -g resourcegroup -h nodename

13. Repeat Step 9 through Step 12 for each additional node that connects to the logical volume.

See Also

To create a logical volume, see How to Add a Logical Volume.