I am running Debian kFreeBSD wheezy. Accidentally I mounted my zfs pool directly into /mnt. When I try to unmount I get an error:zfs unmount myzfspoolcannot unmount '/mnt': Device or resource busyHow could I fix that?
Impossible to umount /mnt
debian;mount;zfs;unmounting
The filesystem mounted on /mnt has open file descriptors from running processes. You normally could try an umount with the force option, but looking up those processes with lsof /mnt and end them is safer.