Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!helios.physics.utoronto.ca!me!yap
From: yap@me.utoronto.ca (Davin Yap)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: Backups: (was: Formatting 720K disks to 1.44 Megs HELP!!)
Message-ID: <89Nov30.135145est.19989@me.utoronto.ca>
Date: 30 Nov 89 18:51:30 GMT
References: <1989Nov27.212809.7241@ux1.cso.uiuc.edu> <1114@bridge2.ESD.3Com.COM> <89Nov28.223437est.19733@me.utoronto.ca> <408@vlsi.ll.mit.edu>
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Organization: University of Toronto, Department of Mechanical Engineering
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malpass@vlsi.ll.mit.edu (Don Malpass) writes:
>(I can't remember the exact name) in the Restore menu on your backup
>disks?  I just went through this exercise using HD (not 2D!) disks at
>1.44 Megs, and the results were an eye-opener!  This was on a Zenith
>286 SuperSport Laptop, which after a call to the Fastback hotline I
>also find needs to have the DMA option manually throttled back from the
>maximum rate that their test passes.  Anyway, after the backup (and I
>called for all the [slow] write-verify options too) I did the file
>compare thing, (I was about to reformat my HD and didn't want to take
>any chances) and out of the 8Meg or so backed up, it gave a non-compare
>message for 5 or 6 files!  

I've got a Nec ProSpeed 286, and yes, I've run the compare option and
have successfully restored from DD disks, using the high speed DMA
option.  As in your case, I restored after formatting my hard disk, so it
was a full backup; not one bad file out of 20 or so meg.  Likely the
problem lies with the DMA hardware of you Zenith.

Davin
_______________leave_nothing_to_the_imagination_of_those_without_______________
GOAL:  To dance the light fan- |Davin Yap, Mechanical Engineering, U of Toronto
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