Managing Serviceguard Seventeenth Edition, First Reprint December 2009

• You must group high availability applications, services, and data, whose control

needs to be transferred together, onto a single volume group or series of volume

groups.

• You must not group two different high availability applications, services, or data,

whose control needs to be transferred independently, onto the same volume group.

• Your root disk must not belong to a volume group that can be activated on another

node.

• HP recommends that you use volume group names other than the default volume

group names (vg01, vg02, etc.). Choosing volume group names that represent

the high availability applications that they are associated with (for example,

/dev/vgdatabase will simplify cluster administration).

• Logical Volume Manager (LVM) 2.0 volume groups, which remove some of the

limitations imposed by LVM 1.0 volume groups, can be used on systems running

some recent versions of HP-UX 11i v3 and Serviceguard. Check the Release Notes

for your version of Servicegaurd for details. For more information, see the white

paper LVM 2.0 Volume Groups in HP-UX 11i v3 at docs.hp.com -> 11i v3 ->

LVM Volume Manager.

If you plan to use the EMS HA Disk Monitor, refer to the section on “Rules for Using

EMS Disk Monitor with Serviceguard” in the manual Using High Availability Monitors

at http://docs.hp.com -> High Availability -> Event Monitoring

Service and HA Monitors -> Installation and User’s Guide

LVM Worksheet

You may find a worksheet such as the following useful to help you organize and record

your physical disk configuration. This worksheet is an example; blank worksheets are

in Appendix E (page 429). Make as many copies as you need.

NOTE: Under agile addressing, the physical volumes in the sample worksheet that

follows would have names such as disk1, disk2, etc. See “About Device File Names

(Device Special Files)” (page 106).

=============================================================================

Volume Group Name: __________/dev/vg01__________________________________

Name of First Physical Volume Group: _______bus0___________________________

Physical Volume Name: ____________/dev/dsk/c1t2d0__________________________

Physical Volume Name: ____________/dev/dsk/c2t2d0__________________________

Physical Volume Name: ____________/dev/dsk/c3t2d0__________________________

Physical Volume Name: _____________________________________________________

132 Planning and Documenting an HA Cluster