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From: bill@crystal.UUCP (Bill Cox)
Newsgroups: net.micro.mac
Subject: disk write protect - hard and software
Message-ID: <27@crystal.UUCP>
Date: Thu, 23-Jan-86 19:36:39 EST
Article-I.D.: crystal.27
Posted: Thu Jan 23 19:36:39 1986
Date-Received: Sat, 25-Jan-86 07:41:00 EST
References: <1636@Shasta.ARPA> <348@ccivax.UUCP> <1667@Shasta.ARPA>
Distribution: net
Organization: U of Wisconsin CS Dept
Lines: 19
Summary: yes and no.

> > ... it was up to the software to ask the OS if the disk
> > was locked; that if the s/w didn't ask, the disk could be written to whether
> > or not it was locked.    DOES ANYONE IN NETLAND KNOW IF THIS IS TRUE?????

> ...And an article from Apple a few days later said that indeed, the disk IS
> write-protected in hardware as well as software.

Yes, it IS write protected in hardware.  However, when I asked about this
some time ago while talking to an Apple Comp.  Mac-hacker, it came out that
there is a way to turn off the LED in the disk drive, so the hardware thinks
that the disk is not protected.


-- 
	William Cox
	Computer Sciences Department
	University of Wisconsin, Madison WI
	bill@wisc.crys.edu
	...{ihnp4,seismo,allegra}!uwvax!bill