On Fri, 19 Nov 2010, Matthias Apitz wrote:
El d?a Friday, November 19, 2010 a las 12:39:13PM -0700, Warren Block escribi?:
Should I overwrite the full USB key from /dev/zero?
Possibly there would still be differences. Filesystem metadata like
date last mounted, for example. If you want a block-by-block duplicate,
the brute-force method is to just dd the whole drive. Use bs=64k or
bs=1m to help reduce overhead.
Warren, perhaps you missed my point. I have a prepared boot-able key and
I want to give away a copy of it as a file on DVD. So I dd(1)'ed the key
to disk and did this twice to ensure that the copy was fine, but the two
files differ. How can I make sure that the file on disk (or DVD) is a
exact copy of the key?
Okay, that makes more sense. Did you mount the key in between the two
times it was dd-ed?
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