On Fri, Jan 10, 2014 at 12:01 PM, Les Mikesell <lesmikesell@gmail.com> wrote:

I think the top level directory has to exist (or the target of the
symlink if you use one) for that to happen.   I'm not sure if that's
the case for  devices that udev mounts by label names or not.  That
is, if the mount point directory goes away with the device.

In any case it might be worth setting a a cron job to stop backuppc
and send a notification if the disk is not present when it is

What I had set up at one point, since my /var/lib/backuppc was on a separate (larger) LVM vg, was I touched a file called .backuppc in /var/lib/backuppc, then in the startup script, put a small check in like

if [ ! -f /var/lib/backuppc/.backuppc ] ; then
  echo "Data partition not mounted"
  exit 1
Worked pretty well, but you have to insure that it persists between upgrades.