GFSA805E

Explanation
 An attempt to nfs mount to pathname for
a file system file_system_name_new  from a particular
client client_host_or_ip_address failed  because
at least one mount point remained on the server side for that pathname 
mount path  but for a different file system file_system_name.
Usually this happens when nested file systems underneath the mount
path have changed (attached or detached ) during server processing.

System action
 NFS continues processing. 

Operator response
 Perform the following recovery actions: Check all existing mount points on the server side with the following: F procname,LIST=MOUNTS  

Find all of the clients using the same mount path  /pathname
Prevent any client from mounting to z/OS UNIX file systems with
the F procname,FREEZE=ONHFS operator command
Inform the system administrator about  the file system change
and about the possibility of performing unmount on clients for /pathname on
behalf of new mount from client_host_or_ip_address
After clients unmount the mount-points, verify again that there
are no other clients accessing the /pathname with
the F procname,LIST=MOUNTS operator command
If no other client is accessing the /pathname but
the Server still shows them in F procname,LIST=MOUNTS
report,  use  F procname,UNMOUNT='/hfs/ pathname' to
remove any information on the server side about obsolete mount points
Enable clients to mount to z/OS UNIX file systems with F procname,FREEZE=OFFHFS

System programmer response
 Contact clients to inform them about
the file system change situation during new mount processing and a
need to unmount the mount-points on all clients.