Dale <rdalek1...@gmail.com> writes:

> Andrew Udvare wrote:
>> On 03/12/2018 17:50, Dale wrote:
>>> Jack wrote:
>>>
>>> I was wondering if the checksums could be checked?  If the OP can find
>>> the checksum for the DVD as it comes from the factory, then he could
>>> check what he has against that.  Question is, is that info even
>>> available or does it vary over batches of DVDs?  If it varies, it may
>>> not be possible to test that way even if checksums are available. 
>>>
>>> Just throwing that out there in case checksums are available and it
>>> could be done that way.  Sort of doubt it tho. 
>> Checksums do exist. The Redump project is trying to collect all relevant
>> disc information for every video game ever made, basically.
>>
>> http://redump.org/disc/57802/
>>
>> The process to generate this information is very specific and requires
>> software that isn't made for Linux unfortunately. But the MD5, CRC32,
>> SHA1 is there which can be usually be checked with `dd /dev/sr0 |
>> sha1sum` for a basic disc.
>>
>> PS1 and PS2 games can be checked without special hardware in this case,
>> but for others, specific hardware is required.
>>
>> In my case I have a JTAG Xbox 360, so the best way for me to check a
>> game is to have my Xbox 360 dump the disc contents entirely with an app
>> that would not be available on a normal Xbox 360. If this fails at any
>> point it's a bad disc (or it needs cleaning/repair).
>>
>
> So as usual, they are not very Linux friendly.  Figures.  I was hoping
> that there might be something helpful out there.  Sounds like there is
> but only in certain cases.  That said, if that will help the OP with
> only half the games, that is half that can be tested.  Otherwise, one
> has to play a lot of games and see if it crashes.  ;-)
>
> My favorite game, if you call this that, Kpatience.  I play spider
> solitaire with it.  Sometimes a few other games.  I did play Tux Racer
> once years ago tho.  I don't recall ever buying a game tho.  I've heard
> of a lot of them and even seen some run but never was to into it. 
>
> Maybe some of this will lead to something that can help the OP. 
>
> Dale
>
> :-)  :-) 

Looks like checking the checksums is the way to go for the PS2 games,
somehow I just assumed it wouldn't be that simple.

I thought that dvdisaster should work for DVDs based on the name, but it
gives the error "this software does not support DVD-ROM type media" for
DVD games and also for regular movie DVDs. Maybe the ebuild is limited
to just CDs for some reason.

- Lasse

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