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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Patching Apple HDSC Setup to work with other drives
Message-ID: <1991May31.190810.16050@eng.umd.edu>
Date: 31 May 91 19:08:10 GMT
References: <6045@mindlink.bc.ca>
Sender: news@eng.umd.edu (C-News)
Organization: College of Engineering, Maryversity of Uniland, College Park
Lines: 20

In article <6045@mindlink.bc.ca> Scott_Busse@mindlink.bc.ca (Scott Busse) writes:
>Adam C. Engst is requesting info about how to patch "other" drives onto a Mac.
>I am also interested in learning about doing this. I would like to know if it's
>possible to hook up any SCSI drive to a MacIIci.
>   Could someone please explain what makes a SCSI drive a Mac specific SCSI
>drive? Thanks for any info!

The Apple SCSI drives have some Apple specific information in them.  I know
some had a patch which made 'blind writing' work reliably, and there is
probably lots of other stuff.  As far as I can tell, the drives from mail
order places like APS and Club Mac are just generic SCSI drives.  The only
problem I've heard of using generic drives (aside from finding compatible
driver software-- what I've been doing is formatting with the software which
comes with the drive and repartitioning with HD SC Setup-- thus, I never ran
into the problems described by one apple person) is that some send a 'Unit
Attention' signal, which causes some Mac Pluses to fail to boot, and also makes
the drive not boot in preference to any other on a Mac II.
--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
     .sig under construction, like the rest of this campus.