NFS issues between Solaris and Linux

G'day all,

I have five unix workstations (2.8) and two linux workstations which all
write to a raided fileserver which is also running Linux (redhat 7). NFS is
working fine for the most part. Recently, on separate occasions, we have had
severe and unexpected power failure which has caused two or more of the SUN
workstations to crash. Unfortunately, one of the UPS's we where using also
failed which resulted in the crash. When we bring the systems back up some
of the workstations are unable to mount the file server thru (v)fstab or
using the mount command. During this time any workstation rebooted also
fails to connect to the fileserver.

The really puzzling part is that in time (hours or days) we eventually are
able to successfully mount onto the fileserver. Apart from being an
frustrating inconvenience, intermittent problems like this drive me to drink
(more).

To me it appears that when the workstations crash, some residual process is
still running on the Linux fileserver, which while running does not allow
all workstations to reconnect. However, I am not sure which processes to
look at pr how to remedy.

Any advice as to what I might be able to modify on the Linux server or
workstations would be greatly appreciated.

Regards,

Jim Dirstein