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From: wschmidt@phobix (Wolfram Schmidt)
Newsgroups: comp.sys.amiga
Subject: Re: 2091 Interface
Message-ID: <304@rusux1.rus.uni-stuttgart.de>
Date: 31 Oct 90 18:22:08 GMT
References: <5357@crash.cts.com> <15476@cbmvax.commodore.com>
Sender: zrf80385@rusux1.rus.uni-stuttgart.de
Reply-To: wschmidt@IAO.FhG.de (Wolfram Schmidt)
Lines: 37

In article <15476@cbmvax.commodore.com> andy@cbmvax.commodore.com (Andy Finkel) writes:
[...]
>It's not true in any way, shape or form.  The 2091 and 590 support more
>than one SCSI drive.
>
>1) You need to properly terminate the SCSI bus for more than one drive
>   to work.  (A SCSI bus needs to be terminated at each end, and no
>   more than at each end.  This may involve removing terminating resistors
>   from the middle drives)
[...]
>			andy
>-- 
>andy finkel		{uunet|rutgers|amiga}!cbmvax!andy
>Commodore-Amiga, Inc.
>
>"It is much easier to suggest solutions when you know nothing about the
> problem."
>
>Any expressed opinions are mine; but feel free to share.
>I disclaim all responsibilities, all shapes, all sizes, all colors.

So what happens if you have multiple drives, one internal and some external?
The bus is terminated at both ends. The host adapter is terminated, too.
Otherwise the manufacturer of the host adapter should have supplied a
terminator for the external port. At least my 2090 has terminators on board.
So when I soon connect an external SCSI tape drive the bus will have three
terminators. Any comments (especially form peolpe who design such things)?

Wolfram

PS: Will the internal cabling of the external tape drive for the A3[05]00UX
    be correct?
-- 
Wolfram Schmidt
Regardless what some silly news software tries to tell you my email address is:
wschmidt@iao.fhg.de                                          wschmidt@IAO.FhG.de
Wolfram Schmidt   Teckstr. 11   W-7056 Weinstadt   Germany   +49-7151/62408  MET