topic Re: umount busy...!! NFS in Operating System - Linux

umount busy...!! NFS

jackfiled — Thu, 25 Dec 2003 19:53:53 GMT

Hi all
Happy christmas..~~ and New year

we have systems with NFS
when I umount the mount point which is NFS,
the mounted point NFS is busy and can not be umounted
what can I do to umount NFS

Re: umount busy...!! NFS

Martin P.J. Zinser — Thu, 25 Dec 2003 21:10:11 GMT

Hello,

umount -f maybe?

Merry christmas,

Martin

Re: umount busy...!! NFS

Francisco J. Soler — Fri, 26 Dec 2003 02:21:41 GMT

Hi, Merry christmas.

Check if there are some terminals or programs that are using this resource. Free it and try to umount.

Frank.

Re: umount busy...!! NFS

jackfiled — Fri, 26 Dec 2003 03:03:46 GMT

Can you tell me how to check the file system used by some processes.?

Re: umount busy...!! NFS

Francisco J. Soler — Fri, 26 Dec 2003 03:44:53 GMT

Hi jackfiled, you can try (like superuser (su -)) the command fuser. For example:

# fuser -um /some_mounted_file_system

You get the proccess pid and the user. If you want to know which proccess is you can do an additional ps ax.

# ps ax | grep pid

Hope this helps.
Frank.

Re: umount busy...!! NFS

Steven E. Protter — Fri, 26 Dec 2003 10:36:33 GMT

Its possible to create a deadly NFS embrace.

Simple example, if server1 tries to mount an export on server2 and server2 tries to mount an export on server1, how do you bring either server down without messing with the other.

Widespread use of NFS mounts requires a plan.

SEP

Re: umount busy...!! NFS

jackfiled — Sun, 28 Dec 2003 19:02:22 GMT

thank you for all of your reply