we have a 2 node cluster (netware 6.5 sp7). was working fine up until a few weeks ago but now users cannot access any volume unless it is mounted on master node. if volume is migrated to other server then users lose access to it.
volume is mounted ok and admin user can see it.
if master node is server1 and any volume is mounted on server1 then users can see it. if volume is mounted on server2 users lose access to it.
if master node is server2 then users can see any volumes mounted on this server but cannot see any volumes mounted on server1.
admin can always see volumes.

users can always browse the master node but never the slave node.
any clues as to what to look for would be appreciated.