>>>>> "MJ" == Matthew Jacob <mjacob@feral.com> writes:

MJ> There's often a tradeoff whether a changer expects block
MJ> descriptors disabled or not. I seem to recall in a brief review of
MJ> the chio code (which I can't do at present as I'm shutting my
MJ> systems down prior to a two week trip) that the ch driver didn't
MJ> try both. Look at st.c for an example.

Okay, I'll check it out; thanks.

MJ> On the other hand, the error would be usually reported as Illegal
MJ> bit in CDB- not Invalid Operation code. Is there a switch for this
MJ> device to enable/disable changer mode?

Nope, that's its only mode of operation, AFAICT.  I was thinking the
problem might be because it's using a slightly different changer
paradigm from what I consider to be "standard."  A given slot can
contain as many as 50 media units.  Does the SCSI changer spec cover
that?

Chris

-- 
-----------------------------------------------------cjones@math.montana.edu
Chris Jones                                          cjones@honors.montana.edu
           Mad scientist at large                    cjones@nervana.montana.edu
"Is this going to be a stand-up programming session, sir, or another bug hunt?"