Using Serviceguard Extension for RAC, 6th Edition, April 2008

• Building Volume Groups for RAC on Mirrored Disks
• Building Mirrored Logical Volumes for RAC with LVM Commands
• Creating RAC Volume Groups on Disk Arrays
• Creating Logical Volumes for RAC on Disk Arrays
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 HA Monitors.
Building Volume Groups for RAC on Mirrored 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.
NOTE: When using LVM version 2.0, the volume groups are supported with
Serviceguard. The steps for configuring the volume groups in Serviceguard clusters is
the same for both LVM version 1.0 and 2.0.
For more information on using and configuring LVM version 2.0, see the HP-UX 11i
Version 3: HP-UX System Administrator's Guide: Logical Volume Management located at:
http://docs.hp.com -> Core HP-UX 11iv3 -> LVM Volume Manager
For LVM version 2 compatibility requirements see the
Serviceguard/SGeRAC/SMS/Serviceguard Mgr Plug-in Compatibility and Feature Matrix at
http://docs.hp.com -> High Availability -> Serviceguard -> Support Matrixes
NOTE: For more information, see the Serviceguard Version A.11.18 Release Notes at
http://docs.hp.com -> High Availability -> Serviceguard
Creating 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 ““Installing Oracle
Real Application Clusters”.”
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/dsk/*
100 Serviceguard Configuration for Oracle 9i RAC