Date: Thu, 8 Nov 2001 12:38:25 +0100 From: Stijn Hoop <stijn@win.tue.nl> To: Nils Holland <nils@tisys.org> Cc: freebsd-questions@freebsd.org Subject: Re: dd and cat - Did I miss something? Message-ID: <20011108123825.E94394@pcwin002.win.tue.nl> In-Reply-To: <20011108121412.Q515-100000@jodie.ncptiddische.net>; from nils@tisys.org on Thu, Nov 08, 2001 at 12:16:57PM %2B0100 References: <20011108121412.Q515-100000@jodie.ncptiddische.net>
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On Thu, Nov 08, 2001 at 12:16:57PM +0100, Nils Holland wrote:
> Hi folks,
>
> I just wanted to copy a data CD. So I thought I'd first read it out. After
> I had put the CD into my ATAPI CD-ROM drive, I issued the following
> command:
>
> dd if=/dev/acd0a of=cdimage
>
> But it didn't work. I received a message saying "acd0a - Invalid
> Argument".
>
> Next, I tried something different, namely:
>
> cat /dev/acd0a | dd of=cdimage
>
> and that did work! Any clues why my first attempt (only using dd and not
> cat) failed?
You should use /dev/acd0c - the 'c' partition means the whole disk. CD's
don't have the concept of partitions, so there are no {a,b,...} partitions.
Why the second attempt worked is a mystery to me...
--Stijn
--
In the force if Yoda's so strong, construct a sentence with words in
the proper order then why can't he?
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