Managing Serviceguard Seventeenth Edition, First Reprint December 2009

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.
1. Use a text editor to create a file that contains the partition information. You need
to create at least three partitions, for example:
3
EFI 100MBHPUX 1MB
HPUX 100%
This defines:
• A 100 MB EFI (Extensible Firmware Interface) partition (this is required)
• A 1 MB partition that can be used for the lock LUN
• A third partition that consumes the remainder of the disk is and can be used
for whatever purpose you like.
2. Save the file; for example you might call it partition.txt.
3. Create the partition; for example (using partition.txt as input):
/usr/sbin/idisk -w -p -f partition.txt /dev/rdsk/c1t4d0
Or, on an HP-UX 11i v3 system using agile addressing (see “About Device File
Names (Device Special Files)” (page 106):
/usr/sbin/idisk -w -p -f partition.txt /dev/rdisk/disk12
This will create three device files, for example
/dev/dsk/c1t4d0s1, /dev/dsk/c1t4d0s2, and /dev/dsk/c1t4d0s3
or:
/dev/disk/disk12_p1, /dev/disk/disk12_p2, and /dev/disk/disk12_p3
Preparing Your Systems 207