Managing Serviceguard Eighteenth Edition, September 2010

Creating a Storage Infrastructure with VxVM
In addition to configuring the cluster, you create the appropriate logical volume
infrastructure to provide access to data from different nodes. This is done with Logical
Volume Manager (LVM), Veritas Volume Manager (VxVM), or Veritas Cluster Volume
Manager (CVM). You can also use a mixture of volume types, depending on your
needs. LVM and VxVM configuration are done before cluster configuration, and CVM
configuration is done after cluster configuration.
For a discussion of migration from LVM to VxVM storage, refer to Appendix G.
This section shows how to configure new storage using the command set of the Veritas
Volume Manager (VxVM). Once you have created the root disk group (described next),
you can use VxVM commands or the Storage Administrator GUI, VEA, to carry out
configuration tasks. For more information, see the Veritas Volume Manager
documentation posted at www.hp.com/go/hpux-core-docs.
Converting Disks from LVM to VxVM
You can use the vxvmconvert(1m) utility to convert LVM volume groups into VxVM
disk groups. Before you can do this, the volume group must be deactivated, which
means that any package that uses the volume group must be halted. Follow the
conversion procedures outlined in the Veritas Volume Manager Migration Guide for
your version of VxVM. Before you start, be sure to create a backup of each volume
group’s configuration with the vgcfgbackup command, and make a backup of the
data in the volume group. See “Migrating from LVM to VxVM Data Storage ” (page 471)
for more information about conversion.
Initializing Disks for VxVM
You need to initialize the physical disks that will be employed in VxVM disk groups.
To initialize a disk, log on to one node in the cluster, then use the vxdiskadm program
to initialize multiple disks, or use the vxdisksetup command to initialize one disk
at a time, as in the following example:
/usr/lib/vxvm/bin/vxdisksetup -i c0t3d2
Initializing Disks Previously Used by LVM
If a physical disk has been previously used with LVM, you should use the pvremove
command to delete the LVM header data from all the disks in the volume group. In
addition, if the LVM disk was previously used in a cluster, you have to re-initialize the
disk with the pvcreate -f command to remove the cluster ID from the disk.
Preparing Your Systems 239