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

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.

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

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 so that the disk can be used as a mirror

copy, which is connected to each node on a different bus other than the bus that is used

for the other (primary) copy.

NOTE: For more information on using LVM, refer to the Managing Systems and

Workgroups: A Guide for HP-UX System Administrators manual.

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/*

56 Serviceguard Configuration for Oracle 10g RAC