Installation guide

62 Chapter 3:Cluster Software Installation and Configuration
3.2 Checking the Cluster Configuration
To ensure that the cluster software has been correctly configured, use the following tools located in
the /sbin directory:
• Test the quorum partitions and ensure that they are accessible.
Invoke the cludiskutil utility with the -t option to test the accessibility of the quorum par-
titions. See Section 3.2.1, Testing the Quorum Partitions for more information.
• Test the operation of the power switches.
If power switches are used in the cluster hardware configuration, run the clustonith command
on each cluster system to ensure that it can remotely power-cycle the other cluster system. Do not
run this command while the cluster software is running. See Section 3.2.2, Testing the Power
Switches for more information.
• Ensure that both cluster systems are running the same software version.
Invoke the rpm -q clumanager command on each cluster system to display the revision of
the installed cluster RPM.
The following section explains the cluster utilities in further detail.
3.2.1 Testing the Quorum Partitions
The quorum partitions must refer to the same physical device on both cluster systems. Invoke the
cludiskutil utility with the -t command to test the quorum partitions and verify that they are
accessible.
If the command succeeds, run the cludiskutil -p command on both cluster systems to display
a summary of the header data structure for the quorum partitions. If the output is different on the
systems, the quorum partitions do not point to the same devices on both systems. Check to make sure
that the raw devices exist and are correctly specified in the /etc/sysconfig/rawdevices file.
See Configuring Quorum Partitions in Section 2.4.4 for more information.
The following example shows that the quorum partitions refer to the same physical device on two
cluster systems (devel0 and devel1):
/sbin/cludiskutil -p
----- Shared State Header ------
Magic# = 0x39119fcd
Version = 1
Updated on Thu Sep 14 05:43:18 2000
Updated by node 0
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