dd errors with certain DVDs

[Paul Smith]

On 3/27/07, Tony Nelson <tonynelson at georgeanelson.com> wrote:
> >> | | Your script is buggy (and needlessly complex). It can round the block
> >> | | count down by one.  Try this:
> >> | |   blocos=$(ls -l "$1" | awk '{ print ($5+2047) / 2048 }')
> >> |
> >> | My script is buggy too. Make it say this:
> >> |   blocos=$(ls -l "$1" | awk '{ print int(($5+2047) / 2048) + 1 }')
> >>
> >> Gah. My brain was off! The first version is correct:
> >>
> >>   blocos=$(ls -l "$1" | awk '{ print ($5+2047) / 2048 }')
> >>
> >> See sig.
> >
> >The above does not work; the error is:
> >
> >$ dvdok backups.iso
> >dd: invalid number `1.25073e+06'
> >
> >$
> >
> >Paul
>
> dd if=/dev/dvd bs=2048 count=$(isosize -d 2048 /dev/dvd) | sha1sum

Thanks, Tony. That works perfectly!

Paul