Managing Serviceguard Sixteenth Edition, March 2009

This procedure updates the binary file with the new MAC address and thus avoids
data inconsistency between the outputs of the cmviewconf and lanscan commands.
Replacing a Failed Quorum Server System
When a quorum server (QS) fails or becomes unavailable to the clusters it is providing
quorum services for, this will not cause a failure on any cluster. However, the loss of
the quorum server does increase the vulnerability of the clusters in case there is an
additional failure. Use the following procedure to replace a defective quorum server
system. If you use this procedure, you do not need to change the configuration of any
cluster nodes.
1. Remove the old quorum server system from the network.
2. Set up the new system and configure it with the old quorum servers IP address
and hostname.
3. Install and configure the quorum server software on the new system. Be sure to
include in the new QS authorization file (/etc/cmcluster/qs_authfile) all
of the nodes that were configured for the old quorum server. Refer to the qs(1)
manpage for details about configuring the QS authorization file.
4. Start the quorum server as follows:
Edit the /etc/inittab file to add the quorum server entries.
Use the init q command to run the quorum server.
See the qs(1) manpage for more details.
5. All nodes in all clusters that were using the old quorum server will connect to the
new quorum server. Use the cmviewcl -v command from any cluster that is
using the quorum server to verify that the nodes in that cluster have connected to
the QS.
6. The quorum server log file on the new quorum server will show a log message
like the following for each cluster that uses the quorum server:
Request for lock /sg/<ClusterName> succeeded. New lock owners: N1, N2
7. To check that the quorum server has been correctly configured and to verify the
connectivity of a node to the quorum server, you can execute the following
command from your cluster nodes as follows:
cmquerycl -q QSHostName -n Node1 -n Node2 ...
The command will output an error message if the specified nodes cannot
communicate with the quorum server.
370 Troubleshooting Your Cluster