From owner-freebsd-multimedia  Tue Dec 18  7:57: 0 2001
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From: Søren Schmidt <sos@freebsd.dk>
Message-Id: <200112181556.fBIFucc04590@freebsd.dk>
Subject: Re: Making audio CDs with FreeBSD
In-Reply-To: <3C1F6845.98E1F33F@mmcable.com>
To: Erik Moe <emoe@mmcable.com>
Date: Tue, 18 Dec 2001 16:56:38 +0100 (CET)
Cc: freebsd-multimedia@freebsd.org
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It seems Erik Moe wrote:
> 
> Yes, that definitely worked, of course you should know :).  Wasn't aware
> that those device files existed.  In fact, they didn't exist on my
> system until I did a "MAKEDEV acd0t32".  Which brings me to my next
> question, what is the difference between acd0a and acd0c?  I know that
> historically the "a" partition was the root partition and "c"
> represented the entire drive, but what do they represent in the context
> of a CD-ROM?  At one time in FreeBSD's history I remember reading a man
> page that described the difference.  Thought it had to do with the
> locking mechanism of the tray, using one device locked the tray, the
> other didn't.

It only for historical reasons, 'c' meant entire disk, 'a' was the
first partition (which doesn't make sense on a CD).

Under FreeBSD current I've changed it to just be acdX and acdXtY
no wierd subdevices (well the still do exist for backwards compat
but use should be discouraged...

-Søren

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