VERITAS Volume Manager 3.1 Storage Administrator Administrator's Guide

Host and Cluster Tasks
Activating a Shared Disk Group
Chapter 5 227
Activating a Shared Disk Group
This procedure sets the activation mode for a shared disk group in a
cluster environment. The disk group activation mode controls read and
write access to volumes in the specified disk group. For shared disk
groups, the activation modes are applied on a per-node basis. The disk
group activation mode applies to the node (host) where you accessed this
task.
To activate a disk group
Step 1. Select the disk group to be activated.
Step 2. Choose Disk Groups > Activation (menu) or Disk Group
Activate/Deactivate (Command Launcher).
Step 3. Complete the Activate Disk Group dialog box as follows:
Disk Group Name: Type the name of the disk group to be activated or
click Browse to select the disk group.
Activation Mode: Select one of the following disk group activation
modes for the current node (host):
• To disallow read and write access for volumes
in the disk group, select Off.
• To give the current node read only access for
volumes in the disk group, select Read Only. No
nodes in the cluster can have write access to
the disk group.
• To give the current node exclusive write access
for volumes in the shared disk group, select
Exclusive Write. No other nodes in the cluster
can have write access to the disk group.
• To give the current node write access for
volumes in the shared disk group, select
Shared Write. Other nodes in the cluster can
share write access to this disk group.