[CentOS] how to unmount an NFS share when the NFS server is unavailable?

Hi All,

How do I unmount an NFS share when the NFS server is unaivalable?

I tried "umount /bck" but it "hangs" indefinitely
"umount -f /bck" tells me the mount if busy and I can't unmount it:

root at saturn:[~]$ umount -f /bck
umount2: Device or resource busy
umount: /bck: device is busy
umount2: Device or resource busy
umount: /bck: device is busy




This non-working NFS share is causing problems on the server and I
need to unmount it until such a time when the NFS server (faulty NAS)
is repaired.


-- 
Kind Regards
Rudi Ahlers
SoftDux

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