Xref: utzoo comp.sys.amiga:18774 comp.sys.amiga.tech:695
Path: utzoo!attcan!uunet!peregrine!ccicpg!cci632!ritcv!ritcsh!rama!jdc
From: jdc@rama.UUCP (James D. Cronin)
Newsgroups: comp.sys.amiga,comp.sys.amiga.tech
Subject: Hard disk expansion
Keywords: SCSI, Supra, Disk
Message-ID: <7200@rama.UUCP>
Date: 4 May 88 17:56:50 GMT
Distribution: na
Organization: Scientific Calculations, Fishers, NY
Lines: 18


  I recently went the homebrew route for a hard disk - Supra SCSI
interface, Ataptec 4070 SCSI<=>ST506 converter and a Seagate ST-238
hard disk, all in an IBM clone cabinet.  It works fine.
  I have a few questions concerning future expansion:

1) The Adaptec 4070 can handle two disks.  Do they appear as SCSI
   devices 0 and 1, or are they presented as one large disk?

2) How does SCSI daisy chaining work?  Are all 50 pins (or 25 MacPins)
   just hooked up in parallel?

3) Does the Supra memory expansion still exist or is it a victim of
   the 256K DRAM "shortage"?  None of the dealers seem to have it in
   stock.

   Thanks in advance,
   Jim Cronin