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To: Migs <jc.devilla@gmail.com>
References: <449EDE85.5040704@gmail.com>
From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
Date: Mon, 26 Jun 2006 16:26:02 -0400
In-Reply-To: <449EDE85.5040704@gmail.com> (Migs's message of "Mon,
	26 Jun 2006 03:05:41 +0800")
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Cc: freebsd-questions@freebsd.org
Subject: Re: dd wont work
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Migs <jc.devilla@gmail.com> writes:

> I've already looked around and found that dd will work on cd's only if
> the bs=2k argument is present.
>
> However, ive tried it both without (before knowing this) and with the
> argument, but I still cant pick up an image of the cd.
>
> I know that this should work:
>
> dd if=/dev/cd0 of=~/file.iso bs=2k
>
> but it doesn't. I always get a
>
> dd: /dev/acd0: Invalid argument
> 0+0 records in
> 0+0 records out
> 0 bytes transferred in 0.000225 secs (0 bytes/sec)
>
> I'm on 6.1 releng by the way, and the cd im trying to dd is
> knoppix. My combo drive is a 'LITE-ON ' 'COMBO SOHC-5236V' 'R$09'
> Removable CD-ROM thats a slave on ide0. What else should I be looking
> at?

Are you actually copying from cd0, or acd0?
Are you sure the problem isn't with the CD itself?