Wii disc internal hash checksums

[themanuel]

(11-03-2015, 02:59 AM)JosJuice Wrote:

(11-03-2015, 02:49 AM)themanuel Wrote: Wii discs have an internal checksum record that can be used to assess the integrity of the useful data, even after trimming the image.  This is used by Wii Backup Manager and other tools to verify images compressed or not.

Does dolphin use this feature when verifying checksums?

Dolphin is currently not using these checksums for anything. It's a good idea, though.

EDIT: Er, actually, I forgot that we have a function that verifies the integrity of a partition. I think it's accessed by right-clicking a partition in the file system view in the game properties. It might not interact well with discs that have had blocks scrubbed inside partitions.

(11-03-2015, 02:49 AM)themanuel Wrote: I don't think the Gamecube discs have this feature, so compressing those does permanently prevent their integrity being verified after being compressed.

Yes, except Dolphin does not scrub GameCube discs while compressing them, so they will still have the same hash.

Those internal Wii checksums would be useful to help validate bug reports.

Good point about the GCN disc compression. I should compress my images without fear of losing the hash and save myself some space.