Activating a Volume Group in Shared Mode (HP-UX Commands Only)

Activation and deactivation of shared volume groups can be done through the DLM control script (runhalt.sh). If you need to perform activation from the command line, you can issue the following command from each node to activate the volume group in shared mode. (The node on which you first enter the command becomes the server node.)

# vgchange -a s -p /dev/vg_ops 

The following message is displayed:

Activated volume group in shared mode.
This node is the Server.

When the same command is entered on the second node, the following message is displayed:

Activated volume group in shared mode.
This node is a Client.

	NOTE: Do not share volume groups that are not part of the OPS configuration.

Deactivating a Shared Volume Group

Issue the following command from each node to deactivate the shared volume group:

# vgchange -a n /dev/vg_ops

Remember that volume groups remain shareable even when nodes enter and leave the cluster.

	NOTE: If you wish to change the capacity of a volume group at a later time, you must deactivate and unshare the volume group first. If you add disks, you must specify the appropriate physical volume group name and make sure the /etc/lvmpvg file is correctly updated on both nodes.