Don't confuse
ID values with
LUN values; they are different things.
Referring to THIS
Mounter scan of my Blizzard 2060 controlled devices:

You can see
IDs numbered from 0 to 6. These IDs are commonly set with a set of jumpers consisting of SIX Pins using up to THREE Bridges in Binary Coding.
I seem to remember that the Controller itself takes ONE ID.
The only reference to
LUN values that I have come across was in a CD-ROM Jukebox where the individual trays had differing
LUNs.