Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!cornell!uw-beaver!tektronix!reed!nscpdc!cvedc!mpease
From: mpease@cvedc.UUCP (Mark Pease)
Newsgroups: comp.sys.mac
Subject: Re: SCSI hard disk hacking, one drive up BUT .......
Keywords: Adaptec ACB4000-A, 2 winchesters, can it be done?
Message-ID: <603@marion.cvedc.UUCP>
Date: 15 Sep 88 16:06:54 GMT
References: <801@atom.OZ>
Reply-To: mpease@marion.UUCP (Mark Pease)
Organization: Computervision Beaverton Oregon
Lines: 40

In article <801@atom.OZ> jgh@atom.OZ (John G. Haub) writes:
>
>                       Home made SCSI Hard disks.
>         ... The Adaptec card has facilities to control
>         two hard disks but I can only ever access Disk 1. Disk 2 CAN be used
>         PROVIDED that I configure it as Disk 1 (and likewise Disk 1 as 2).
>
>------------------------------------------------------------------------------->John Haub                              ACSNET: jgh@atom.oz
>C.S.I.R.O.                             ARPANET: jgh%atom.oz@seismo.css.gov
>Division of Mineral and Process         UUCP: {seismo,ukc,prlb2,ubc-vision}!
>Engineering                                   munnari!atom.oz!jgh
>Lucas Heights Research Laboratory             
>Private Mailbag 7 Menai 2234
>Sydney
>N.S.W.
>Australia
>-------------------------------------------------------------------------------



Ahh! The old two Hard Disks on an Adaptec 4000A with a Mac problem!! The 
problem is not with the software (well, maybe. I have not tried to format
two disks with the formaters discribed in the article.) but with the
Adaptec! They put out a App. Note that discribes a problem with the Mac/4000A
combinations. There is some timing problem (that is OK in the SCSI spec.).
The fix is to get a new prom from Adaptec that fixes the problem. I have not
tried to run down the prom, has anyone?




Mark Pease                      ..tektronix.csnet!ogcvax.uucp!cvedc!mpease
Computervision                  ..sun.arpa!cvbnet.uucp!cvedc!mpease
14952 N.W. Greenbrier Pkway          
Beavertion, Oregon 97006                    (503)645-2410
-- 
Mark Pease                      ..tektronix.csnet!ogcvax.uucp!cvedc!mpease
Computervision                  ..sun.arpa!cvbnet.uucp!cvedc!mpease
14952 N.W. Greenbrier Pkway          
Beavertion, Oregon 97006                    (503)645-2410