NFS client

[j773303]

Due to the NFS server is down, there is an
mount pint that's /apps/test is still mountd.
How to remove the /apps/test from SAM or other ways?

note: It will show /apps/test device busy.

[Andreas D. Skjervold]

Hi

Belive you might not be allowed to do this until the NFS server is up again...?

rgds
Andreas

[Robert-Jan Goossens]

Hi,

# umount /apps/test

will give

nfs: server XXX.XXX.XXX.XXX not responding, still trying

Reboot is the only option left.

Robert-Jan.

[S.K. Chan]

A reboot would clear you stale NFS mount on the NFS client .. if this fails to work ..
# mount -v
==> Take note of the stale mount point. It may look like this .. (for example)
server:/opt/data on /apps/test type nfs ....
# fuser server:/opt/data
==> See if there are any processes that may still accessing it and kill them with ..
# fuser -k server:/opt/data
# umount server:/opt/data
==> Try to umount it .. if it still fails .. reboot is your only option.

[j773303]

But the mount entry is still existing in NFS Client, if reboot the machine, is /apps/test still re-connect to NFS server? Does this not a problem. Any way I can remove the /apps/test
from NFS client?

node: The NFS server is down and in the troubleshooting currently.

[S.K. Chan · Accepted solution]

If you reboot the client, on it's way up it'll try to mount /apps/test and since the server is still down, the mount request will timeout and the client will be without the mount point. What you can do is comment out the mount point entry in /etc/fstab before you reboot the client, that way it'll be ignore. Later when the server eventually come back you can always mount the FS manually and then remember to uncomment the entry in /etc/fstab.

[Robert-Jan Goossens]

Have you got lsof ?

try finding the processes on /apps/test and kill them.

# umount /apps/test

Don't think it will work but !!!

If this is not working. Uncomment /apps/test from the /etc/mnttab and reboot

Hope it helps,

Robert-Jan.

[Andreas D. Skjervold]

Hi again

If hardmounted uncomment the filesystem in /etc/fstab before rebooting or the server will not come up.

Andreas

[Zeev Schultz]

I'd also check automount (/etc/auto_master)
and (though extreme) can cancel nfs client at
all (through /etc/rc.config.d/nfsconf).

Zeev

[Robert-Jan Goossens]

Thanks Andreas
it is /etc/fstab not mnttab.