Managing Serviceguard 14th Edition, June 2007

Building an HA Cluster Configuration
Preparing Your Systems
Chapter 5 215
• If you are using a disk array, create the smallest LUN the array will
allow, or, on an HP Integrity server, you can partition a LUN; see
“Creating a Disk Partition on an HP Integrity System”.
• If you are using individual disks, use either a small disk, or a portion
of a disk. On an HP Integrity server, you can partition a disk; see
“Creating a Disk Partition on an HP Integrity System”.
IMPORTANT On HP 9000 systems, there is no means of partitioning a disk or
LUN, so you will need to dedicate an entire small disk or LUN for the
lock LUN. This means that in a mixed cluster containing both
Integrity and HP-PA systems, you must also use an entire disk or
LUN; if you partition the device as described below, the HP-PA nodes
will not be able to see the partitions.
Creating a Disk Partition on an HP Integrity System
You can use the idisk utility to create a partition for a lock LUN in a
cluster that will contain only HP Integrity servers. Use the procedure
that follows; see the idisk (1m) manpage for more information. Do this
on one of the nodes in the cluster that will use this lock LUN.
CAUTION Before you start, make sure the disk or LUN that is to be partitioned has
no data on it that you need. idisk will destroy any existing data.