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Article #266

Re: Xerox 1108 disk questions

#266
From: Norm Crowfoot
Date: Mon, 11 Mar 1991 03:23
32 lines
2399 bytes
Bob,

Have you checked the obvious: that the drive belt isn't scraping and that the
drive hold-down clamp hasn't worked itself loose?

You're looking for the pre-SCSI form of disk interconnection, the so-called
"SA-1000" interface.  This was the connection interface for the larger 8"
rigid disk drives that wre used in the 1108.  Thus it's possible to add almost
anyone's disk that matches this somewhat dated interface format.  There are a
number of "hopped-up" 1108 and 1186's within Xerox that are running a 150 MB
disk, though I don't believe that it's a Quantum.

Jesse's right, Quantum's still very much in the disk drive business, having
one of the very popular 5" format 105 MB SCSI drives that's in a lot of units
these days.

If you change out the disk drive to a higher capacity, you'll have to do some
messing with the Othello layer and also make certain that it'll play with
whatever you're running.  Viewpoint, for instance, needs a different software
disk driver.  If you're sticking in the Interlisp world, I suspect that simply
altering the track formatting parameters through Othello would be sufficient.

Even though I'm an employee of Xerox, these comments are simply my own and
relate to my own days of being a grad student suffering with 1108's.
--
|   |    Norm Crowfoot               Voice:     716/422-2458             
|\  |    KBS Competency Center       Internet:  crowfoot@arisia.xerox.com      
| \ |    Xerox Corp - MS: 0845-20C   XNS:       ncc:wbst845e:xerox             
|  \|    780 Salt Road               FAX:       716/422-2479                   
|   |    Webster, New York  14580                                              
   /|\                                                                         
  / | \                                                                        
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Message-ID: <NORM.91Mar10222308@hydro.wbst845e.xerox.com>
Path: arc1-ca.pugleaf.net!utzoo!news-server.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!udel!rochester!rocksanne!spot!norm
References: <1991Mar7.144556.26602@godot.RadOnc.UNC.EDU>

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Path: arc1-ca.pugleaf.net!utzoo!news-server.csri.toronto.edu!cs.utexas.edu!usc!wuarchive!udel!rochester!rocksanne!spot!norm
From: norm@hydro.wbst845e.xerox.com (Norm Crowfoot)
Newsgroups: comp.sys.xerox
Subject: Re: Xerox 1108 disk questions
Message-ID: <NORM.91Mar10222308@hydro.wbst845e.xerox.com>
Date: 11 Mar 91 03:23:08 GMT
References: <1991Mar7.144556.26602@godot.RadOnc.UNC.EDU>
Sender: news@WRC.XEROX.COM
Organization: Xerox KBS Center, Webster, New York
Lines: 32
In-reply-to: thorn@godot.RadOnc.UNC.EDU's message of 7 Mar 91 14:45:56 GMT