NFS timeout notes

First try "umount -f /mounted/path/to/umount" - a lot of linuxes and
unixes support this now.

If you're on a linux system, you can try "umount -l /mounted/path/to/umount".

If you get an error about the filesystem being busy, you -may- be able
to figure out why the filesystem is busy in a variety of ways:
1) lsof - but may just hang
2) fuser - but may also just hang
3) ps auxwwe | grep /mounted/path/to/umount - but likely won't show
all dependencies
4) Take some guesses - what would you Expect to be using that NFS mount?

This one's cute, something I thought up :).  If you have an NFS server
down that's causing the NFS timeout, and it isn't practical to bring
the server back up just to do a umount, then you might try creating a
virtual interface that has the same IP address as the machine that's down.
Be careful though - I once saw a system's outgoing networking get messed
up by such a virtual interface, so you may need to remove the virtual
interface ASAP after doing your umount.

 

NFS timeout notes

First try "umount -f /mounted/path/to/umount" - a lot of linuxes and
unixes support this now.

If you're on a linux system, you can try "umount -l /mounted/path/to/umount".

If you get an error about the filesystem being busy, you -may- be able
to figure out why the filesystem is busy in a variety of ways:
1) lsof - but may just hang
2) fuser - but may also just hang
3) ps auxwwe | grep /mounted/path/to/umount - but likely won't show
all dependencies
4) Take some guesses - what would you Expect to be using that NFS mount?

This one's cute, something I thought up :).  If you have an NFS server
down that's causing the NFS timeout, and it isn't practical to bring
the server back up just to do a umount, then you might try creating a
virtual interface that has the same IP address as the machine that's down.
Be careful though - I once saw a system's outgoing networking get messed
up by such a virtual interface, so you may need to remove the virtual
interface ASAP after doing your umount.