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Date:      Wed, 24 Jul 2002 22:33:50 -0400
From:      Jud <jud@myrealbox.com>
To:        "Ed Yu" <edlyu@yahoo.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: acd0a, acd0c, cd0a, cd0c different?
Message-ID:  <20020724223350.40044ba9.jud@myrealbox.com>
In-Reply-To: <20020725005427.53006.qmail@web20708.mail.yahoo.com>
References:  <20020725005427.53006.qmail@web20708.mail.yahoo.com>

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On Wed, 24 Jul 2002 17:54:27 -0700 (PDT)
"Ed Yu" <edlyu@yahoo.com> wrote:

> I was trying to setup automounter by reading the
> article in deamon news. The article uses cd0c, whereas
> I used to have acd0c in my fstab. I also found that
> acd0a can also be used in mount. What are the
> differences between them? I understand that slice c in
> normal hardisk means the whole disk, is that the case
> as well? So in this case acd0a = acd0c? But what is
> the cd0a and cd0c?
> 
> thanx,
> ed

acd0c is the entire (atapi) cd-rom.  acd0a would be root, I
suppose.  I have never automounted my cd-rom drive, so I don't
know if acd0a=acd0c for this purpose, but ISTR trying acd0a
unsuccessfully for playing music CDs, while acd0c worked.

Using Google Groups I see posts referring to SCSI cd-rom drives
using /dev/cd0a and /dev/cd0c, so perhaps that's the significance
of the missing "a" at the front.

Jud

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