Re: Physically have install DVD set. Want ISO's from which they came.

[Reco <recoverym4n@gmail.com>]

 Hi.

On Sun, 23 Feb 2014 11:45:26 +1100
David <bouncingcats@gmail.com> wrote:

> whereas if you know that you do actually want the output file, it will
> be quicker to
> read it once and then checksum the file like this:
>   # dd if=/dev/cdrom bs=2048 count=23150592 conv=notrunc,noerror > cd.iso
>   # md5sum cd.iso

You can read the device once, write the result to the file AND calculate the
checksum at the same time:

dd if=/dev/cdrom bs=2048 count=23150592 conv=notrunc,noerror | tee cd.iso | md5sum

Reco