HowTo: force umount a busy device in linux
Filed in System Administration, linux administration on Apr.07, 2009
Here’s how :
When you try to umount the regular way, if a device is busy you’ll get the following :
dev:/# umount /dev/sda1
umount2: Device or resource busy
umount: /boot: device is busy
This can be solver very easy by entering this :
dev:/# umount -l /dev/sda1
July 21st, 2009 at 7:26 pm
To avoid misunderstandings:
The -l option does a “lazy” unmount, which means it keeps waiting until the device isn’t busy any longer before automatically unmounting it. It doesn’t “force” anything at all.