Managing Serviceguard Fifteenth Edition, reprinted May 2008

Building an HA Cluster Configuration
Preparing Your Systems
Chapter 5216
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 (http://docs.hp.com -> High Availability
-> Event Monitoring Service and HA Monitors -> Installation
and User’s Guide).
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 from the bus that is
used for the other (primary) copy.
For more information on using LVM, refer to the Logical Volume
Management volume of the HP-UX System Administrator’s Guide.
You can use the System Management Homepage to create or extend
volume groups and create logical volumes. From the System
Management Homepage, choose Disks and File Systems. Make sure
you create mirrored logical volumes with PVG-strict allocation.
When you have created the logical volumes and created or extended the
volume groups, specify the filesystem that is to be mounted on the
volume group, then skip ahead to the section “Deactivating the Volume
Group”.
To configure the volume groups from the command line, proceed as
follows.
If your volume groups have not been set up, use the procedures that
follow. If you have already done LVM configuration, skip ahead to the
section “Configuring the Cluster.”
Obtain a list of the disks on both nodes and identify which device files
are used for the same disk on both. Use the following command on each
node to list available disks as they are known to each system:
lssf /dev/d*/*