I just finished adding some C304x SCSI drives to our system and shuffling
a CD-ROM from one to the other.  A couple of questions (that I should have
asked ahead of time, but what the heck...):
 
* Not knowing the device ID for a C304x (nor the C302x drives previously
  installed) I used the generic HPC3010M1 which seems to work fine.  Is
  this a problem?  These device IDs are rather like the old classic device
  type/subtype codes, as long as you gave it a CS80 driver it didn't really
  care which one you used.  Are the SCSI drivers the same?
 
* Along the same lines, I think flexibility went a little too far.  I forgot
  to save configs on one system (I stole it's CD-ROM an replaced it with a
  C304x add-on drive).  It booted just fine and mounted the disc!  Weird.
 
[\] Jeff Kell <[log in to unmask]>