This is an old bug that often confuses people, rightfully.

For some laptop and server type cdroms, the drives advertise themselves
as tray loading even if they are caddy-like or slot-in loaders.  This
means they cannot insert the media on their own, and this generates a
5/24/00 error to START_STOP_UNIT.

This prevents the logging of such a failure, and also fixes the
generation of such a bad command in case the mech type was correctly set
by the drive.