Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!ucsd!sdcsvax!ucsdhub!hp-sdd!hplabs!hpda!hpcuhb!hpcilzb!hpcea!twakeman
From: twakeman@hpcea.CE.HP.COM (Teriann Wakeman)
Newsgroups: comp.sys.mac
Subject: Re: Hard Disk on MAC 512?
Message-ID: <430110@hpcea.CE.HP.COM>
Date: 13 Jul 89 18:32:42 GMT
References: <115167@sun.Eng.Sun.COM>
Organization: HP Corporate Engineering - Palo Alto, CA
Lines: 28

There are three posibilities for adding a hard drive to a 512K

1. get an old parrellel interface hard drive. I do not think anyone still
makes these, but if you shop around, one might be found cheaply.  Apple
sold a large number of 20 Meg driver.

2. Add the 128K ROMs and a third party SCSI board.  The third party
boards use the battery opening in the back of the enclosure for the
SCSI connector.  This will allow you to use most any SCSI drive.

3. Locate a old style internal non-SCSI hard drive. I don't know of any
being built these days but you may be able to find one if you poke about.
The old Hyperdrives are an example of these {my old Hyperdrive 20s were        
however reliably unreliable}.

Speeds:  SCSI drives of course are the fastest option. parallel drives are
about half way between the speed of floppys and SCSI drives, and internal
non-SCSI drives are about half way in speed between parallel interface drives
and SCSI drives.


If it were me, I would get a third party SCSI drive bundled with a 2 MEG RAM
upgrade.  The SCSI add-ons are always cheaper when bundled with a RAM upgrade.
There are probably other good manufacturers but I would recommend Dove
for the upgrade.  They have been around & have a good reputation.


TeriAnn