Cannot umount

rust8y · 07-16-2006, 07:15 PM

I've su - root
When I tried to do a umount it says device is busy
How do I solve this problem? Thanks.

gilead · 07-16-2006, 07:39 PM

It sounds like there are open files - which partition are you trying to umount? Regardless, it's probably easier to boot your system with either your install CD, a LiveCD or the SystemRescueCd (http://www.sysresccd.org/Main_Page).

Matir · 07-16-2006, 07:46 PM

There's an open file on the mounted partition. This would include open shells and file browsers with their working directories in the partition.

cs-cam · 07-16-2006, 07:57 PM

Quote:

Originally Posted by gilead

It sounds like there are open files - which partition are you trying to umount? Regardless, it's probably easier to boot your system with either your install CD, a LiveCD or the SystemRescueCd (http://www.sysresccd.org/Main_Page).

Why are we booting from a rescue CD ot unmount a partition?

You can use lsof to find out what is using the parition. Something like this should start you in the right direction

Code:

lsof | grep <mountpoint>
# <mountpoint> is where this partition is mounted

gilead · 07-16-2006, 08:33 PM

Quote:

Originally Posted by cs-cam

Why are we booting from a rescue CD ot unmount a partition?

Because if the unmounted partition contains the commands he needs to run, he can't do anything. If the partition doesn't contain any required files then there's no problem.

Matir · 07-16-2006, 08:41 PM

In very few cases does one want to unmount such a partition... mostly it's a backup data partition, usb drive, cdrom, etc.