HP Serviceguard manual 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.

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 80):

/usr/sbin/idisk -w -p -f partition.txt /dev/rdisk/disk12

NOTE: Device files for partitions cannot be cluster-wide DSFs (cDSFs). For more information about cDSFs, see “About Cluster-wide Device Special Files (cDSFs)” (page 104).

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

NOTE: The first partition, identified by the device file /dev/dsk/c1t4d0s1 or /dev/ disk/disk12_p1 in this example, is reserved by EFI and cannot be used for any other purpose.

4.Create the device files on the other cluster nodes.

Use the command insf -eon each node. This will create device files corresponding to the three partitions, though the names themselves may differ from node to node depending on each node’s I/O configuration.

5.Define the lock LUN; see “Defining the Lock LUN”.

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