can't umount nfs share after server goes offline...

df will not run.... I can't umount the share.  Do I have to either bring the server side up to get this fixed?  What if I couldn't bring the server side up?  Would I have to reboot client to get the mount unmounted and df working?
XetroximynAsked:
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woolmilkporcConnect With a Mentor Commented:
Did you try

umount -l /mount/point

or

umount -f /mount/point

?

If you did and it wasn't successful and if you really can't bring up the server then I fear rebooting the client is your only option to get rid of the stale mount.
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Dan CraciunConnect With a Mentor IT ConsultantCommented:
Right now, reboot is your only option.

If you don't want to get in the same situation again, you could either use autofs or a soft mount.

HTH,
Dan
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Carlos IjalbaConnect With a Mentor Senior SysadminCommented:
Try restarting the NFS client:

rcnfsserver restart 

Open in new window

(this is for Suse, but you can search the command for your particular distro)

If it is a NFSv4 mount, try with:

umount.nfs4 /mountpoint -l

Open in new window


If that doesn't unmount it, try to find if there are any open files on the mountpoint with fuser, or just plan a system reboot out of hours to correct it.
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Hanno P.S.Connect With a Mentor IT Consultant and Infrastructure ArchitectCommented:
The standard hard mount is designed to wait for the server to come back up again.
If you use soft mounts it will possible to unmount.
Sometimes you can forceably unmount (umount -f ...) or try to restart the NFS client on your machine. Be aware that this can hang forever while trying to unmount (do it in an extra window or in background).
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