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#Run against the device
ddrescue -r 1 -b 2048 /dev/diskN diskname.iso diskname.log

#test the iso, if its borked try 
#Re-run against the raw device
ddrescue -b 2048 /dev/rdiskN diskname.iso diskname.log

#SEE
#http://ask.metafilter.com/68265/But-its-just-a-little-scratch
#http://www.gentoo-wiki.info/HOWTO_Backup_a_DVD



#Automated …?
##!/bin/bash
#N=6
#diskname="hexedfiles"
#ddrescue -r 1 -b 2048 /dev/disk${N} ${diskname}.iso ${diskname}.log
#ddrescue -b 2048 /dev/rdisk${N} ${diskname}.iso ${diskname}.log