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Date:      Tue, 2 Mar 1999 22:25:25 -0500
From:      Natty Rebel <dervish@ikhala.tcimet.net>
To:        "Kenneth D. Merry" <ken@plutotech.com>
Cc:        scsi@freebsd.org
Subject:   Re: Problems with teac cdroms + symbios based adapters?
Message-ID:  <19990302222525.A4752@ikhala.tcimet.net>
In-Reply-To: <199903020510.WAA76988@panzer.plutotech.com>; from Kenneth D. Merry on Mon, Mar 01, 1999 at 10:10:49PM -0700
References:  <19990301194216.A2001@ikhala.tcimet.net> <199903020510.WAA76988@panzer.plutotech.com>

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Quoting Kenneth D. Merry (ken@plutotech.com):
> Natty Rebel wrote...
> > Hey all (I had posted this message to hackers, but scsi is more appropriate ...)
> > 
> > I've recently purchased a Teac 516s 16x cdrom along with a Kouwell 801V10B
> > Fast SCSI adapter (Symbios 53C810a chipset).  My problem is that the cdrom
> > drive fails to recognise any cd's placed in it.  Here are some results
> > using camcontrol:
> > 
> > # camcontrol tur -n cd -v
> > (pass0:ncr0:0:3:0): TEST UNIT READY. CDB: 0 0 0 0 0 0 
> > (pass0:ncr0:0:3:0): NOT READY asc:3a,0
> > (pass0:ncr0:0:3:0): Medium not present
> > Unit is not ready
> > 
> > the above is the main message that i see (i.e. 'medium not present' and
> > 'unit is not ready').
> 
> Hmm, interesting. 
> 
> > what's funny is that i can send the eject command
> > and the tray will eject.
> 
> That's not surprising at all.  In fact, I would expect that with tray-type
> drives.
I'm curious as to why this is?

> 
> > i've called teac tech support and the rep said 
> > there were some known issues with cam and symbios based chipsets.  is this correct?
> 
> How would someone from Teac know about CAM at all?  Sure, there are some
> bugs in the NCR/Symbios driver.  They mainly due to the fact that no one is
> actively maintaining it.
Since that's the case I'll see what I can do.  Since the drive does respond
to the eject command, maybe this combo can be made to work.

[snippage ...]
> Well, I'm not sure what we can really do about it.  If the drive says
> there's no media present, there's probably not a whole lot you can do to
> convince it otherwise.
> 
> Does that controller/drive combination work on any other OS?
Not sure, but I'll check with the other BSD's and Linux groups.

> I kinda suspect that it won't.  At least if you can tell them "it doesn't work
> under Windows", they might take the drive back and give you one that works.
Well my wife has a win95 box.  Maybe I'll do some tinkering late one nite,
while she's asleep of course ... #;^)

> 
> Ken
> -- 
> Kenneth Merry
> ken@plutotech.com
Thanks for the help ...

#;^)
-- 
natty rebel
harder than the rest ...


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