How to Remove a Sun Cluster Patch

If necessary, you can back out (remove) a Sun Cluster patch.

1. Become superuser on the node from which you are removing the patch.

2. List the resource groups and device groups on the node having the patch removed.

   # scrgadm -pv # scstat

3. Switch all resource groups, resources, and device groups from the node having the patch removed to other cluster members.

   # scswitch -S -h node[,...]

   -S

   Evacuates all device services and resource groups from the specified node.

   -h node[,...]

   Specifies the nodes from which you are switching the resource groups and device groups.

4. Shut down the node.

   # shutdown -g0 -y -i0 “message”

   -g0

   Specifies, in seconds, the amount of time to wait before shutting down. Default grace period is 60 seconds.

   -y

   Specifies to answer yes to the confirmation prompt.

   -i0

   Specifies init state of 0. This brings the node down to the OBP prompt.

   message

   Specifies the warning message to broadcast. Use quotes if message contains multiple words.

5. Boot the node in non-cluster single-user mode.

   ok boot -sx

6. Remove the patch.

   # patchrm patch-id

   patch-id

   Specifies the patch number of a given patch.

7. Reboot the node.

   # reboot

8. Verify that the patch has been removed successfully.

   # showrev -p | grep patch-id

9. Verify that the node and cluster are operating normally.

10. Repeat Step 1 through Step 9 for the remaining cluster nodes.

11. Switch resource groups, resources, and device groups as needed (optional).

    After rebooting all the nodes, the last node rebooted will not have the resource groups and device groups online.

    # scswitch -z -Ddevice-group[,...] -h node[,...] # scswitch -z -g resource-group[,...] -h node[,...]

    -z

    Specifies the change in mastery of a resource group or device group.

    -h node[,...]

    Specifies the nodes to which you are switching the resource groups and device groups.

    -D

    Switches the specified device groups to the nodes identified by the -h option.

    -g

    Switches the specified resource groups to the nodes identified by the -h option. If -h is not specified, the resource groups are taken offline.

Example—Removing a Sun Cluster Patch

The following example shows the removal of a Sun Cluster patch.

# scrgadm -pv
...
RG Name: schost-sa-1
...
# scstat
...
Device Group Name:																	dg-schost-1
...
# scswitch -S -h phys-schost-2
# shutdown -g0 -y -i0 "Rebooting down node for maintenance"
...
ok boot -x
...
# patchrm 234567-05
...
# reboot
...
# pkgchk -v 234567-05
...
# scswitch -z -D dg-schost-1 -h phys-schost-1
# scswitch -z -g schost-sa-1 -h phys-schost-1