For DASD file systems, at least one system in the shared file system group needs to have a physical I/O path to the volume where the file system resides and the volume is varied online. Without connectivity from at least one system, the file system will not be available to any of the systems in the shared file system group. Connectivity from one system can provide shared file system accessibility to the file system for all other systems in the shared file system group.

All systems need to have the physical file system (PFS) started. Accomplish this by placing the appropriate FILESYSTYPE statement in the BPXPRMxx parmlib member that is used in the configuration. Additionally, any necessary subsystems required by the PFS must be started and configured, especially if this system is to function as the file system owner. For example, the NFS Client PFS requires that the TCP/IP subsystem be started and a network connection configured.