Managing Serviceguard 13th Edition, February 2007

Building an HA Cluster Configuration
Creating the Storage Infrastructure and Filesystems with LVM and VxVM
Chapter 5 209
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 -> 11i v2-> Mission
Critical Operating Environment -> Event Monitoring Service
and HA 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 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.
Using SMH to Create Volume Groups and Logical Volumes 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”.
Using LVM Commands to Create Volume Groups and Logical
Volumes If your volume groups have not been set up, use the
procedure in the next sections. If you have already done LVM
configuration, skip ahead to the section “Configuring the Cluster.”
Selecting Disks for the Volume Group 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*/*