Umounting NFS shared directory

matta · 03-08-2004, 07:12 AM

Hi,

I have a backup disk that I mount on /backup whenever I need to backup. I have an NFS share on /backup/current, which "works" whenever /backup is mounted. My problem is that when I have mounted /backup and used it over NFS, I can't unmount it, I get "/backup device busy". However, by stopping nfsd I can unmount it, so NFS apparently has something using it. I would really like to be able to umount it w/o having to restart NFS every time. Any ideas?

Thanks in advance.

Matta

ac1980 · 03-08-2004, 04:14 PM

Unmounting a fs with open files would result in damage to both filesystem and kernel filehandle table. So you should unexport the directory before unmounting. However, there is no need to completely stop nfsd to do this: use /usr/sbin/exportfs -u exportname
See 'man exportfs' for more info

matta · 03-09-2004, 05:31 AM

Quote:

Originally posted by ac1980
Unmounting a fs with open files would result in damage to both filesystem and kernel filehandle table. So you should unexport the directory before unmounting. However, there is no need to completely stop nfsd to do this: use /usr/sbin/exportfs -u exportname
See 'man exportfs' for more info

Thanks, that should do the trick!