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From: gus@Shasta.ARPA
Newsgroups: net.micro.mac
Subject: Write protect tabs
Message-ID: <23@Shasta.ARPA>
Date: Fri, 31-Jan-86 13:56:38 EST
Article-I.D.: Shasta.23
Posted: Fri Jan 31 13:56:38 1986
Date-Received: Sat, 1-Feb-86 21:27:32 EST
References: <1636@Shasta.ARPA> <348@ccivax.UUCP> <1667@Shasta.ARPA> <425@mmm.UUCP> <597@puff.UUCP>
Distribution: net
Organization: Stanford University
Lines: 18

> > 
> > 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

No! YOU don't undestand! Some early Sony disks don't have a writeprotect hole
at all, just as the previous poster described. Unless an LED can
differentiate between thick blue plastic and thin blue plastic, the switch
MUST be mechanical