Path: utzoo!yunexus!ists!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!uunet!mcsun!sunic!nuug!ifi!m2cs.uu.no!tomas
From: tomas@m2cs.uu.no (Tomas Felner)
Newsgroups: comp.sys.atari.st
Subject: Re: SH 204 Upgrade
Keywords: SH204 upgrade MFM ST512 5.25" half-height
Message-ID: <1989Nov17.180516.5325@m2cs.uu.no>
Date: 17 Nov 89 18:05:16 GMT
Article-I.D.: m2cs.1989Nov17.180516.5325
References: <1359@engage.enet.dec.com> <3321@jhunix.HCF.JHU.EDU>
Organization: Modula-2 CASE Systems A/S, Oslo, Norway
Lines: 27

jheddy@jhunix.HCF.JHU.EDU (Jared Brennan) writes:
>    The SH204 case will hold a 5.25" half-height hard drive, a type which
>is readily available from any manufacturer that makes hard drives.  The
>drive must support MFM encoding and the ST512 interface.  You can use
>a 3.5" hard drive in the SH204, but you must use brackets to expand the
>form-factor to that of a 5.25" drive; my SH204 had a Tandon TM263 3.5"
>drive mechanism, which was in a framework that fitted the drive into
>the 5.25" slot provided.  Also, check the power supply in your SH204;
>I found a 40W supply in mine, which seems to be sufficient to power a
>Seagate ST251-1, the Adaptec 4000A SCSI controller, and ASCI-SCSI adapter.
>Anything below that wattage is not guaranteed to do the same . . .

I upgraded my SH204 to 100MB more than a year ago. I replaced the
Adaptec 4000A controller by a 4070 RLL controller, removed the Tandon
TM262 20MB MFM disk (and sold it), and put in two Seagate ST157R 50MB
RLL disks. This all fits just about into the SH204 case. And I didn't
encounter any problems with this setup or the power supply so far. The
only problem I had were quite some bad blocks on one of the disks, but
that's a whole different story ...

Tomas
-- 
                          Tomas Felner
     Modula-2 CASE Systems AS  |  Internet: tomas@m2cs.uu.no
            Maridalsveien 139  |  Phone: +47 2 379784
        N-0461 Oslo 4, Norway  |  FAX: +47 2 356448