Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site ssc-vax.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!tektronix!uw-beaver!ssc-vax!gcc
From: gcc@ssc-vax.UUCP (Greg C Croasdill)
Newsgroups: net.micro.mac
Subject: Re: HFS compatability and Software backup - Simple solutions
Message-ID: <536@ssc-vax.UUCP>
Date: Mon, 3-Feb-86 10:40:16 EST
Article-I.D.: ssc-vax.536
Posted: Mon Feb  3 10:40:16 1986
Date-Received: Wed, 5-Feb-86 01:55:56 EST
References: <1636@Shasta.ARPA> <348@ccivax.UUCP> <1667@Shasta.ARPA> <425@mmm.UUCP> <597@puff.UUCP>
Distribution: net
Organization: Boeing Aerospace Co., Seattle, WA
Lines: 41

> > >The way the protection works is if a sensor sees the little red light shine
> > >through the hole of a locked disk, nothing gets written to the disk.  
> > >However, I've been told that it is possible to instruct the IWM to turn off
> > >the light, thereby making the disk writeable....
> > >						Robert J. Hammen
> > >						Manta Software Corp.
> > >						U of Wisc. CS Dept.
> > >						hammen@gumby.uucp
> > 
> > Then how come my Sony disks work? The write-protect mechanism on those
> > diskettes doesn't include a hole going through the diskette - there is a 
> > small tab that can be moved back and forth, but you can't see through the
> > diskette in either mode.
> > 
> > 	--MKR
>  No, you don't seem to understand.  The tab that you slide back & forth IS
>  the hole that I'm referring to. (I never said the hole was in the actual 
>  media).  When the tab is moved so that you can see through the CASE of the
>  microdisk, then the disk is locked.
> 
> 						Robert J. Hammen

*** REPLACE THIS LINE WITH YOUR MESSAGE ***

On the HP 3.5" disk there is no hole. (period)  There is a small clip in
the correct place for the hole, which you can break off and "protect" your
disks, but no light can get through this area in any case.  Here at Boeing,
this is the type of disk stocked, are we screwed ?  Can we not protect our
data?  Let's here some real answers (Apple).

Thanks in advance.
Greg C  (uw-beaver|fluke)!ssc-vax!gcc


disclaimer:  I am not speaking for the Boeing company, only as an interested
party, with alot of valuable data on perhaps vulnerable diskettes.

quote of the day: 
'A woman stepped forward and asked, "What is the strangest day?"
	"Tuesday", the Master explained.'
				-from _The Profit_ by Kehlog Albran