umount reports device is busy

J.A.X · 02-07-2013, 11:31 AM

Hi all

I'm using Fedora 17, however I was unable to unmount a device.

PHP Code:



~ : umount /dev/hdc

Reports the device is busy

so I try

PHP Code:



~ : umount -f /dev/hdc

And I get the same output.

How to make it unmount without questioning

Thanx in advane

unSpawn · 02-07-2013, 12:25 PM

You need to supply the partition number as in '/dev/hdc1' and check which mount point it uses (just run 'mount') then 'umount /whatever/mountpoint'.

ted_chou12 · 02-07-2013, 02:17 PM

IF YOU STILL get the same message when umounting hdc1 do:

Code:

#umount  -l  /dev/hdc1

l stands for LAZY.
Ted

unSpawn · 02-07-2013, 02:36 PM

...if you still get the "busy" message I'd use 'lsof +D/whatever/mountpoint' or '/sbin/fuser -v /whatever/mountpoint' instead to find out which process keeps files open on the file system.

smbhandary · 02-09-2013, 07:14 AM

And dont forget to get off the mount point you wish to umount.

enter cd at the command prompt and hit enter to land in your home directory.

mreff555 · 02-09-2013, 09:25 AM

If your present working directory is within your mount point you are using that resource. try 'cd /', then unmount.

btw have noticed recently from typing errors that umount /dev/sdb is sometimes sufficient to remove /dev/sdb1.

In this case there is only one partition so I'm not sure if it's unmounting everything or just defaulting to the only option. I never noticed it til about a year ago. is this new?

kingbeowulf · 02-09-2013, 10:22 PM

I have noticed under KDE that if nepomuk, etc. service are running, or if KDE services are running under Xfce, for example, it can take 5-10 minutes before you can umount.

mreff555 · 02-11-2013, 08:52 AM

ugh....

I really hate auto-mounting of ancillary drives. It's not a whole lot of work to do it yourself and it's so much nicer to have complete control over what is being used and what isn't.