On 20 Dec, NetBSD Bob wrote:

> As to scsi tapes like the Cipher 9 track decks with single-ended scsi,
> why or why not could they also not be hung off the disk scsi bus?
It depends on the SCSI adaptor. I expect that the Q-Bus SCSI adaptor
emulates a MSCP adaptor. If the adaptor speaks MSCP the actual type of
disk (or in general block oriented device e.g. hard disk, CDROM, MO,
...) and the interface of the disk (MFM, ESDI, SMD, SDI, SCSI, ...) is
not significant for the bootrom and the OS. They all treated the same
from the view of the bootrom/OS. It is a property of the adaptor what
SCSI devices it can "hide" behind the (T)MSCP protocol. My Dilog SQ706A
can only handle SCSI disks (perhaps CDROMs, not tested yet), no tapes.
The later Dilogs can also speak TMSCP => SCSI Tapes are maped to TMSCP
devices. 
-- 



tschüß,
         Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/