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From: hammen@puff.UUCP (Zaphod Beeblebrox)
Newsgroups: net.micro.mac
Subject: Re: HFS compatability and Software backup - Simple solutions
Message-ID: <597@puff.UUCP>
Date: Thu, 30-Jan-86 13:43:04 EST
Article-I.D.: puff.597
Posted: Thu Jan 30 13:43:04 1986
Date-Received: Sat, 1-Feb-86 07:17:55 EST
References: <1636@Shasta.ARPA> <348@ccivax.UUCP> <1667@Shasta.ARPA> <425@mmm.UUCP>
Distribution: net
Organization: U of Wisconsin CS Dept
Lines: 24
Summary: write-protected disks

In article <425@mmm.UUCP>, mrgofor@mmm.UUCP (Michael Ross) writes:
> In article <45@gumby.UUCP> hammen@gumby.UUCP writes:
> >
> >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