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Path: utzoo!watmath!clyde!cuae2!ihnp4!drutx!druhi!lbl
From: lbl@druhi.UUCP
Newsgroups: comp.sys.atari.st
Subject: Re: Re: Hard disk questions
Message-ID: <1597@druhi.UUCP>
Date: Thu, 15-Jan-87 11:28:25 EST
Article-I.D.: druhi.1597
Posted: Thu Jan 15 11:28:25 1987
Date-Received: Fri, 16-Jan-87 07:07:16 EST
References: <983@husc6.UUCP> <513@atari.UUcp>
Organization: AT&T Information System Labs, Denver, Co
Lines: 41

In article <513@atari.UUcp>, apratt@atari.UUCP writes:
> I am grateful to Justin Grunau (grunau@husc4.harvard.edu) for saving
> me from typing all that again.  However, he did suggest something
> dangerous, and I would like to warn one and all about it:
> 
> BE CAREFUL ABOUT USING "SHOW INFO" TO SEE HOW MANY FOLDERS YOU HAVE.
			.
			.
			.
> 
> To answer one of the other questions, if you insert a floppy with five
> folders on it, you should count those five.  If you then remove that
> floppy and insert one with ten folders, you can SUBTRACT the five and
> then ADD the ten from your mental count.  Specifically, MEDIA CHANGE
> REMOVES THOSE FOLDERS FROM THE TALLY.  Part of the problem is that you
> never get media change on a hard disk.
> 
> /----------------------------------------------\
> | Opinions expressed above do not necessarily  |  -- Allan Pratt, Atari Corp.
> | reflect those of Atari Corp. or anyone else. |     ...lll-lcc!atari!apratt
> \----------------------------------------------/

Allan,

I'd like you to comment on an idea that I have that might provide a small 
"safety net" for the 40 folder problem.  I'd like to insert some disk routine
monitor code that sees every call to the disk read/write routines.  At
strategic intervals, yet to be determined, it would return a "media might have
changed" status instead of a "success" status to the caller of the routines.
Since GEMDOS uses these routines it would now sometimes get a media change from
the hard disk.

I am aware that this will not solve the 40 folder problem, but would it help
at all in postponing the symptoms?

Barry Locklear
AT&T Information Systems Labs
Denver, CO 80241
(303) 538-4954
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