[CentOS] Looping Device unmounting problem

[Kwan Lowe]

On Thu, Feb 17, 2011 at 8:36 AM, dixan rodriges <dixan23 at gmail.com> wrote:
> Dear All,
>
>
>
> I have created  252 loop devices in my system and i mounted few iso filses
> into loop devices .when i rebooting the system error showing "faild to
> umount "
>
>
> how can forcefully umount the loop device

Not specific to loopback devices, but in some cases I use fuser to
kill all procs associated with a mount... You may also need to remount
it as read-only before unmounting and maybe use the -nr option to
umount.