Date: Tue, 20 May 2003 14:46:30 -0400 From: Chuck Swiger <cswiger@mac.com> To: FreeBSD-Questions@freebsd.org Subject: Re: Creating a bin or ISO image of a CD?? Message-ID: <3ECA7806.9080502@mac.com> In-Reply-To: <20030519192420.I24726@wonkity.com> References: <Pine.GSO.4.44L0.0305191912530.23582-100000@shell.core.com> <20030519200918.U95244@Gina.esfm.ipn.mx> <20030519192420.I24726@wonkity.com>
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Warren Block wrote: > On Mon, 19 May 2003, Eduardo Viruena Silva wrote: >> dd if=/dev/acd0c of=my_image bs=2352 > > Hmmm. This brings up something I've wondered about. I always use > bs=2k to match the actual sector size of CDs. The "sector size" of a CD isn't constant, or perhaps it would be better to say that the size depends on whether you want to consider the raw data including the Reed-Solomon ECC data (and maybe the subchannel info, too-- see DAO96 as a reference keyword), or the data post-ECC. -Chuck
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