Path: utzoo!attcan!uunet!zephyr.ens.tek.com!gvgpsa!gold!grege
From: grege@gold.GVG.TEK.COM (Greg Ebert)
Newsgroups: sci.electronics
Subject: Re: hard disk stumpper
Keywords: puzzles
Message-ID: <1291@gold.GVG.TEK.COM>
Date: 15 Aug 90 15:59:56 GMT
References: <3967@newton.physics.purdue.edu>
Distribution: na
Organization: Grass Valley Group, Grass Valley, CA
Lines: 9


Check the WRITE_GATE signal, pin 6 on a 34-pin cable (aka ST506). When the
WRITE_GATE signal is low, it'll wipe-out anything on the disk, which means
that whatever is on the differential WRITE_DATA lines is immaterial.

If you can, try grounding WRITE_GATE and see if it obliterates the data. At
least you can isolate the problem between the drive and the controller.

This sounds like a neat puzzle   :-O