I have a RAID6 array.  1 drive is bad and now un-plugged because the system
hangs waiting on the disk.

The system won't boot because / is "not clean".  I booted a rescue CD and
managed to start my arrays using --force.  I tried to stop and start the
arrays but they still required --force.  I then used "echo repair >
sync_action" to make the arrays "clean".  I can now stop and start the RAID6
array without --force.  I can now boot normally with 1 missing disk.

Is there an easier method?  Some sort of boot option?  This was a real pain
in the @$$.

It would be nice if there was an array option to allow an "un-clean" array
to be started.  An option that would be set in the md superblock.

Thanks,
Guy