Managing Serviceguard Sixteenth Edition, March 2009

Be sure to follow UPS and cabinet power limits as well as SPU power limits.
Power Supply Configuration Worksheet
You may find the following worksheet useful to help you organize and record your
power supply configuration. This worksheet is an example; blank worksheets are in
Appendix E. Make as many copies as you need.
==========================================================================
SPU Power:
Host Name ____ftsys9__________ Power Supply _____1_______________
Host Name ____ftsys10_________ Power Supply _____2_______________
==========================================================================
Disk Power:
Disk Unit __________1_______________ Power Supply ____3________________
Disk Unit __________2_______________ Power Supply ____4________________
Disk Unit __________________________ Power Supply _____________________
Disk Unit __________________________ Power Supply _____________________
Disk Unit __________________________ Power Supply _____________________
Disk Unit __________________________ Power Supply _____________________
==========================================================================
Tape Backup Power:
Tape Unit __________________________ Power Supply _____________________
Tape Unit __________________________ Power Supply _____________________
==========================================================================
Other Power:
Unit Name __________________________ Power Supply _____________________
Unit Name __________________________ Power Supply _____________________
Cluster Lock Planning
The purpose of the cluster lock is to ensure that only one new cluster is formed in the
event that exactly half of the previously clustered nodes try to form a new cluster. It is
critical that only one new cluster is formed and that it alone has access to the disks
specified in its packages. You can specify an LVM lock disk, a lock LUN, or a quorum
server as the cluster lock. For more information about the cluster lock, and requirements
and recommendations, see “Cluster Lock ” (page 62).
NOTE: You cannot use more than one type of lock in the same cluster.
A one-node cluster does not require a lock. Two-node clusters require the use of a
cluster lock, and a lock is recommended for larger clusters as well. Clusters larger than
Cluster Lock Planning 131