Impossible to umount a filesystem

[haux]

A "unpresent" a disk mounted on HPUX 11.23 (I use LVM)

When doing "bdf" the CLUI hang up, I can"t umount it, with "mount -v" I can see the filesystem mounted on that disk

Is there any problem to umount the filesystem without rebooting ?

Regards.

[Robert-Jan Goossens]

Hi,

Try a forced umount.

# umount -f /filesystem

Regards,
Robert-Jan

[James R. Ferguson]

Hi:

If by "unpresent" you mean that the underlying, locally-attached, physical disk cannot be accessed (e.g. by 'dd') then a reboot may be your only option.

If the mountpoint is an NFS one, you could try forcefully unmounting with:

# umount -f

Beware that this may cause open files to loose data. See the 'mount_nfs(1M)' manpages for more details.

Regards!

...JRF...

[Jeeshan]

forcefully disconnect all connections from that mount point using command

#fuser -cu mountpoint

then try to unmount

[Bill Hassell]

Because bdf hangs and umount fails, this is very likely an NFS (shared from another computer) mountpoint and the server no longer works correctly. Unfortunately, this is a feature of NFS -- you can't un-mount an NFS filesystem if the NFS server is not working. There are features in 11.31 that will possibly help. Meanwhile, look at this document for some ideas -- and use NFS very carefully (if at all) on production systems.

http://www.docs.hp.com/en/3929/ForciblyUnmountingNFSFilesystems.pdf

[Patrick Ware_1]

To see who is keeping you from unmounting:

fuser -cu /mountpoint

To forcefully unmount:

fuser -cuk /mountpoint ; umount /mountpoint

[Tejas J Raval]

Hi,

Can you try the following command

#umount -v filesystemname

Regards,

Tejas

[Tejas J Raval]

Hi,

Can you try the following command.

# umount -v /filesystemname

Regards,

Tejas

[Aashique]

Hi,
try with this command:

fuser -ku /dev/vgname/lvolname

umount /mount-point

Thanks & Regards

A. Aashique

[haux]

Hi,
Thanks for the replay,

The commande "umount -v /mount" hangup,

It's not an NFS filesystem it's physical disks, they are unplugged from the server.

It seams that the only way to resolve this is to reboot the server.