Installation guide

Section 3.2:Checking the Cluster Configuration 63
/sbin/cludiskutil -p
----- Shared State Header ------
Magic# = 0x39119fcd
Version = 1
Updated on Thu Sep 14 05:43:18 2000
Updated by node 0
--------------------------------
The Magic# and Version fields will be the same for all cluster configurations. The last two lines of
output indicate the date that the quorum partitions were initialized with cludiskutil -I, and the
numeric identifier for the cluster system that invoked the initialization command.
If the output of the cludiskutil utility with the -p option is not the same on both cluster systems,
perform the following:
• Examine the /etc/sysconfig/rawdevices file on each cluster system and ensure that the
raw character devices and block devices for the primary and backup quorum partitions have been
accurately specified. If they are not the same, edit the file and correct any mistakes. Then re-run
the cluconfig utility. See Section 3.1.1, Editing the
rawdevices File for more information.
• Ensure that you have created the raw devices for the quorum partitions on each cluster system. See
Configuring Quorum Partitions in Section 2.4.4 for more information.
• On each cluster system, examine the system startup messages at the point where the system probes
the SCSI subsystem to determine the bus configuration. Verify that both cluster systems identify
the same shared storage devices and assign them the same name.
• Verify that a cluster system is not attempting to mount a file system on the quorum partition.
For example, make sure that the actual device (for example, /dev/sdb1) is not included in an
/etc/fstab file.
After performing these tasks, re-run the cludiskutil utility with the -p option.
3.2.2 Testing the Power Switches
If either network- or serial-attached power switches are employed in the cluster hardware configura-
tion, install the cluster software and invoke the clustonith command to test the power switches.
Invoke the command on each cluster system to ensure that it can remotely power-cycle the other clus-
ter system. If testing is successful, then the cluster can be started. If using watchdog timers or the
switch type "None", then this test can be omitted.
The clustonith command can accurately test a power switch only if the cluster software is not
running. This is due to the fact that for serial attached switches, only one program at a time can access
the serial port that connects a power switch to a cluster system. When the clustonith command is