Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!rutgers!clyde!watmath!water!ljdickey
From: ljdickey@water.waterloo.edu (Lee Dickey)
Newsgroups: comp.sys.atari.st
Subject: Re: about ST disk drives (and media change)
Message-ID: <1319@water.waterloo.edu>
Date: 28 Dec 87 17:49:38 GMT
References: <8712211937.AA01474@ucbvax.Berkeley.EDU> <914@atari.UUCP>
Reply-To: ljdickey@water.waterloo.edu (Lee Dickey)
Organization: U. of Waterloo, Ontario
Lines: 26

Thank you, Alan, for the informative answer, which raises another question...

In article <914@atari.UUCP> apratt@atari.UUCP (Allan Pratt) writes:
>
>The media-change sensing is done using the write-protect signal from the
>drive.  ...
>
>When a disk is in the "maybe changed" state, the next access (through
>RWABS or maybe Floprd) will check the serial number of the disk in the
>drive.  If it hasn't changed, then the disk hasn't changed, either. 
>This is another assupmtion: you should not have two disks with the same
>serial number.
> ...

What is the "serial number" you mention?  
I have seen no mention of it before.
I have noticed something called "disk label" that comes up
when I ask it to "SHOW INFO".  Is *that* the "serial number"?

How can I be sure that no two disks have the same serial number?


-- 
 L. J. Dickey, Faculty of Mathematics, University of Waterloo. 
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