HP Veritas Volume Manager 5.0 -UX 11i v3 manual Configuring shared disk groups

Configuring Veritas Volume Manager

Configuring cluster support

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Configuring shared disk groups

This section describes how to configure shared disks in a cluster. If you are installing Veritas Volume Manager for the first time or adding disks to an existing cluster, you need to configure new shared disks.

If you are setting up Veritas Volume Manager for the first time, configure the shared disks using the following procedure:

1Start the cluster on one node only to prevent access by other nodes.

2On one node, run the vxdiskadm program and choose option 1 to initialize new disks. When asked to add these disks to a disk group, choose none to leave the disks for future use.

3On other nodes in the cluster, run vxdctl enable to see the newly initialized disks.

4From the master node, create disk groups on the shared disks. To determine if a node is a master or slave, run the command vxdctl -c mode.

Use the vxdg command or VEA to create disk groups. If you use the vxdg command, specify the -soption to create shared disk groups.

5From the master node only, use vxassist or VEA to create volumes in the disk groups.

Note: RAID-5 volumes are not supported for sharing in a cluster.

6If the cluster is only running with one node, bring up the other cluster nodes. Enter the vxdg list command on each node to display the shared disk groups.

Converting existing VxVM disk groups to shared disk groups

To convert existing disk groups to shared disk groups:

1Start the cluster on one node only to prevent access by other nodes.

2Configure the disk groups using the following procedure. To list all disk groups, use the following command:

#vxdg list

To deport the disk groups that are to be shared, use the following command:

#vxdg deport diskgroup

To import disk groups to be shared, use the following command:

# vxdg -s import diskgroup

This procedure marks the disks in the shared disk groups as shared and stamps them with the ID of the cluster, enabling other nodes to recognize the shared disks.