Date: 2012jul24 OS: Linux Q. When I attempt to umount a CIFS (Samba) filesystem umount hangs. Is there a way to avoid this? A. Use the -l (lazy) option of umount. eg:

umount -l /mnt/myfolder

The manual page says:

-l Lazy unmount. Detach the filesystem from the filesystem hierar- chy now, and cleanup all references to the filesystem as soon as it is not busy anymore. (Requires kernel 2.4.11 or later.)