Consider the following points when you plan cluster file systems.
Loopback file system (LOFS) - Sun Cluster software does not support the use of the loopback file system (LOFS) on cluster nodes.
Communication end-points - The cluster file system does not support any of the file-system features of Solaris software by which one would put a communication end-point in the file-system name space.
Although you can create a UNIX domain socket whose name is a path name into the cluster file system, the socket would not survive a node failover.
Any FIFOs or named pipes that you create on a cluster file system would not be globally accessible.
Therefore, do not attempt to use the fattach command from any node other than the local node.