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From: russotto@eng.umd.edu (Matthew T. Russotto)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Apple HD / Silverlining Interaction bug?
Message-ID: <1991May31.191528.16195@eng.umd.edu>
Date: 31 May 91 19:15:28 GMT
References: <1991May30.100257.7941@swift.cs.tcd.ie>
Sender: news@eng.umd.edu (C-News)
Organization: College of Engineering, Maryversity of Uniland, College Park
Lines: 16

In article <1991May30.100257.7941@swift.cs.tcd.ie> brady@swift.cs.tcd.ie writes:
>Net friends, here is a question about using two hard disks, one standard
>Apple HD, the other a WREN III initialised with Silverlining. 5.22.
>It seems that no matter what we set the Startup Disk to, the Mac will
>always choose the Apple-initialised disk over the Silverlining-initialised one
>Has anyone got a fix on this please?

I believe this is the 'unit attention' problem.  Workarounds are to zap the
signature bytes on the Apple disk (a real pain), or to cut the SCSI reset line
(bad idea-- makes Startup Device work, but if the drive gets hung, you have
to cycle its power).

Anyone know how to turn off the Unit Attention on a WREN (III or IV)?
--
Matthew T. Russotto	russotto@eng.umd.edu	russotto@wam.umd.edu
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