HP Serviceguard Extended Distance Cluster for Linux A.01.01 Deployment Guide, Third Edition, May 2008

Configuring your Environment for Software RAID
Configuring the Environment
Chapter 366
• Ensure that the Quorum Server link is close to the Ethernet links in
your setup. In cases of failures of all Ethernet and Fibre channel
links, the nodes can easily access the Quorum Server for arbitration.
• The Quorum Server is configured in a third location only for
arbitration. In scenarios where the link between two nodes is lost,
each node considers the other node to be dead. As a result, both
nodes will try to access the Quorum Server. The Quorum Server, as
an arbitrator, acknowledges the node that reaches it first and allows
the package to start on that node.
• You also need to configure Network Time Protocol (NTP) in your
environment. This protocol synchronizes the nodes irrespective of
whether the nodes are in the same or different time zone.