Unable to unmount filesystem

[dictum9]

This is 11.23, L class

What can I do to unmount it?

# umount /dev/vgignite2/lvol2
umount: cannot unmount /sapmnt/LLC : Device busy
umount: return error 1.
#
# fuser -cu /sapmnt/LLC
/sapmnt/LLC:

# fuser -ku /sapmnt/LLC
/sapmnt/LLC:

# umount /dev/vgignite2/lvol2
umount: cannot unmount /sapmnt/LLC : Device busy
umount: return error 1.
#

[Pete Randall · Accepted solution]

fuser is not terribly reliable. Try using lsof to find out who/what is using the lvol:

http://hpux.cs.utah.edu/hppd/hpux/Sysadmin/lsof-4.77/


Pete

[DCE]

try lsof

http://gatekeep.cs.utah.edu/hppd/cgi-bin/search?package=on&description=on&term=lsof&Search=Search

It is much more efficient than fuser.

Also, dumb question - is /sapmnt/LLC your current directory? You cannot unmount a filesystem if you in it (or in a child directory)

[A. Clay Stephenson]

Fuser is rather useless for this task (although it is intended to do this task); lsof will find processes that fuser never does. Download and install lsof and use it to track down your processes which still are using the file system.

[James R. Ferguson]

Hi:

One classic error is to be 'cd'ed into the directory that you are trying to unmount. Make sure that you aren't.

You can also try 'fuser' using the block special device file instead of the mountpoint:

# fuser -ku /dev/dsk/cXtYdZ

Regards!

...JRF...

[Peter Nikitka]

Hi,

perhaps this filesystem is NFS-exported.
Unexport it via
exportfs -uv /sapmnt/LLC

mfG Peter

[Jov]

>> One classic error is to be 'cd'ed into the directory that you are trying to unmount.

True, but fuser tends to show this even as useless as it is.

Best is to use lsof as suggested by all above.


Jov