Re: sha256sum a dvd

[Gordon Messmer <gordon.messmer@xxxxxxxxx>]

On Mon, Apr 24, 2017 at 9:53 AM, James B. Byrne <byrnejb@xxxxxxxxxxxxx> wrote:
> sha256sum /dev/sr0
> Which gave this result:
> sha256sum: /dev/sr0: Input/output error

isoinfo -d -i /dev/sr0 | grep -i -E 'block size|volume size'

dd if=/dev/cdrom bs=<block size from above> count=<volume size from
above> | sha256sum

Reference:
https://www.thomas-krenn.com/en/wiki/Create_an_ISO_Image_from_a_source_CD_or_DVD_under_Linux
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