Managing Serviceguard 11th Edition, Version A.11.16, Second Printing June 2004

Building an HA Cluster Configuration
Creating a Storage Infrastructure with LVM
Chapter 5 199
Creating a Storage Infrastructure with LVM
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 Cluster
Volume Manager (CVM), or VERITAS Volume Manager (VxVM). 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.
This section describes storage configuration with LVM. Separate
procedures are given for the following:
• Creating Volume Groups for Mirrored Individual Disks
• Creating Volume Groups for Disk Arrays Using PV Links
• Distributing Volume Groups to Other Nodes
The Event Monitoring Service HA Disk Monitor provides the capability
to monitor the health of LVM disks. If you intend to use this monitor for
your mirrored disks, you should configure them in physical volume
groups. For more information, refer to the manual Using High
Availability Monitors.
Creating Volume Groups for Mirrored Individual
Data Disks
The procedure described in this section uses physical volume groups
for mirroring of individual disks to ensure that each logical volume is
mirrored to a disk on a different I/O bus. This kind of arrangement is
known as PVG-strict mirroring. It is assumed that your disk
hardware is already configured in such a way that a disk to be used as a
mirror copy is connected to each node on a different bus than the bus
that is used for the other (primary) copy.
For more information on using LVM, refer to the HP-UX Managing
Systems and Workgroups manual.