I'm not sure whether to trust when the left most byte is different because other bytes within the page might be altered randomly from different runs too. I'm making notes of when this happens in the notes field but I'm looking for when the first 4 bytes are exactly 00 03 00 00 to know that it's workable for sure.
Fair enough, the point I was trying to make was, it may be a good idea to ask the dumper to try again with a different disc, since in his case this only occurred with one specific PC game disc.
Anyway, 6 more drives from me and a few friends, sorted in folders with which disc was used and all. The _pylinux folder contains the modified version for Linux that jason098 and I did. smartctl was used to get some drive info, so I ended up making it a part of the script. So, some folders will have a smartctl.txt file with that info separately from an earlier version, and others will have that info included in logfile.log.