Novell SUSE LINUX ENTERPRISE SERVER 10 SP2 HEARTBEAT Manual page 71

this command with extreme caution. For more information, refer to crm_uuid(8)
(page 98).
Managing a Node's Standby Status
The crm_standby command can manipulate a node's standby attribute. Any
node in standby mode is no longer eligible to host resources and any resources that
are there must be moved. Standby mode can be useful for performing maintenance
tasks, such as kernel updates. Remove the standby attribute from the node as it
should become a fully active member of the cluster again. See crm_standby(8)
(page 95) for a detailed introduction to this tool's usage and command syntax.
Managing a Cluster 63