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From: exodus@uop.EDU (G. Onufer)
Newsgroups: comp.sys.atari.st
Subject: Re: Daisy chaining SH204's
Message-ID: <776@uop.EDU>
Date: Sat, 21-Nov-87 02:54:20 EST
Article-I.D.: uop.776
Posted: Sat Nov 21 02:54:20 1987
Date-Received: Mon, 23-Nov-87 03:46:20 EST
References: <8711171046.AA09562@ucbvax.Berkeley.EDU> <317@mks.UUCP> <5990@jade.BERKELEY.EDU>
Organization: UoP-- Sun Lab Administration
Lines: 24
Keywords: SH204
Summary: He's talking about daisy-chaining SH204's, not actual hard drives

In article <5990@jade.BERKELEY.EDU>, c60a-2ae@web4e.berkeley.edu.BERKELEY.EDU (John Kawakami -O^O-,510d or 260E,6431816,6667734) writes:
> In article <570@aucs.UUCP> 870646c@aucs.UUCP (barry comer) writes:
> >I have a general question for all of the hackers out there, "Can you 
> >chain together the SH204 drives by installing an extra DMA socket on
> 
> But back to the question.  I think it's limited to two.  I recall
> something about the drive port pins: a drive select pin to address
> drive one and another for drive two.  The drive ports are just that,
> drive ports, not serial ports that "converse" with the devices.
> 
> HEY everybody, correct me if I'm wrong (hope I am.).
					  ^^^^^^^^^
Don't worry, you are.  Barry Comer is talking about daisy-chaining
SH204's, not the Tandon drives that come inside the SH204.  It is possible
to daisy-chain up to 8 of the SH204 by chaning the SCSI address of each.
(A 3-switch dipswitch == 2^3 combinations = 8).  Just make the right
cables and away you go....

But you did have the right idea... you add another physical drive inside
(well, to the internal controller anyways...be kinda hard to shove another
drive into that cabinet.)  the SH204..the Adaptec 4000 _can_ support two
hard drives.  

G. Onufer