topic Re: Cannot unmount file system. in Operating System - HP-UX

Cannot unmount file system.

zsujith — Thu, 10 Jan 2008 05:32:59 GMT

Hi,

When i try to umount a filesystem it states cannot find FS in /etc/mnttab and cannot umount. But the filesystem is not mounted at all and when run bdf on the mount point directory it shows mounted on /(root).

Also when i try to mount it states the file system is already mounted.

Waiting for your reply.
Regards

Re: Cannot unmount file system.

Dennis Handly — Thu, 10 Jan 2008 05:38:26 GMT

If bdf says it is on "/", then it isn't a filesystem but a subdirectory of "/". (Of course this is what would happen if it isn't mounted, so that may not mean anything.)

>when i try to mount it states the file system is already mounted.

What was the command you used?

Re: Cannot unmount file system.

zsujith — Thu, 10 Jan 2008 05:40:24 GMT

the command used is mount /vol/arch

Re: Cannot unmount file system.

zsujith — Thu, 10 Jan 2008 05:47:17 GMT

Hi,

The error is

vxfs mount: /dev/dsk/c1t1d0 is already mounted, /vol/arc is busy,
or allowable number of mount points exceeded

Regards

Re: Cannot unmount file system.

Dennis Handly — Thu, 10 Jan 2008 06:28:41 GMT

>vxfs mount: /dev/dsk/c1t1d0 is already mounted, /vol/arc is busy,

Was that a typo, /vol/arc?

What does the "/vol/arch" line show in /etc/fstab?

Re: Cannot unmount file system.

Venkatesh BL — Thu, 10 Jan 2008 07:52:04 GMT

I think /vol/arc is just a directory and not a mounted file system. You can check the output of 'mount' command.

I did a small experiment on my box:

bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 2064384 519928 1532424 25% /
/dev/vg00/lvol1 1998072 466776 1331488 26% /stand
/dev/vg00/lvol7 6144000 3819080 2313624 62% /var
/dev/vg00/lvol9 3571712 3568176 3536 100% /usr
/dev/vg00/lvol6 2064384 57664 2001856 3% /tmp

Now, I try 'umount' on a directory 'blv' in /tmp...

# umount /tmp/blv
umount: cannot find /tmp/blv in /etc/mnttab
cannot unmount /tmp/blv

Looks similar to what you described.

Re: Cannot unmount file system.

Roberto Arias — Thu, 10 Jan 2008 09:51:20 GMT

please try this:

cd /tmp
fuser -cu
fuser -ku
umount -a
mount -a
umount

Re: Cannot unmount file system.

MarkSyder — Thu, 10 Jan 2008 10:41:08 GMT

This looks very much like an nfs mount. Is /vol in /etc/mnttab?

Mark Syder (like the drink but spelt different)

Re: Cannot unmount file system.

zsujith — Fri, 11 Jan 2008 04:16:31 GMT

The problem got resolved.