Hacking wii disc to .iso to .wbfs

[nunavat2010]

Cleanrip decrypt wii data partition in dumping?

What do .iso to .wbf converters do. I went through couple of web pages. Downloaded the source codes for wiims iso tools. He does have the cleanest version of libwbfs.h. Apparently "kwirk" came up with wbfs format? I still do not have a clear understanding of what .iso->.wbfs does.



PS: if wiibrewers are so much against to backup loaders and wad managers, wonder why they host cleanrip.

 

[WiiPower]

At 1st wbfs(wii backup file system) was the partition type for the 1st usb loader. The format was developed by Waninkoko and Kwirk, who also developed the 1st cIOS that was able to load games from usb, cIOS rev9.

I'm not sure, but i think a .wbfs file contains the data of the game 1:1 the way it would be stored on a wbfs partition.

 

[qwertymodo]

.wbfs files are not 1:1, they are scrubbed to remove garbage padding data from the image. They can also be split at 2 or 4gb in order to support FAT32 (which cannot support files >4gb)

 

[WiiPower]

Split files don't change the format, and games on wbfs partitions are already scrubbed. Do you mean that there's still some junk in those and the .wbfs files are scrubbed further?

 

[TiMeBoMb4u2]

... still do not have a clear understanding of what .iso->.wbfs does.

All Wii Discs have the exact same uncompressed size. However, in actuality, they are NOT really the same size games. Any unused space is padded to create the full size. So, ISO to WBFS "scrubs" the white space, leaving only the game. In MANY cases, this will save in excess of 2-3GB of storage!

 

[Wiimm]

That's not 100% correct.

An ISO image is like a hard disk: It contains partitions and file systems. But the filesystems are not full and filled with random data (exact: most with constant data that looks like random data because of encryption).

Scrubbing is to fill the unneded data with a constant value (WiiScrubber use 0xff, other tools 0x00) to allow better compression by rar/zip. If using 0x00, the tools may use the sparse effect of the file systems (don't allocate hard discs blocks for areas with contant 0x00) to save disk space. Normal file listers tell only the length of the file, not the disk usage (sparse effect).

A WBFS (and also CISO (=WBI), WDF, WIA) manage the unused blocks and make the files smaller. All formats are also able to store unscrubbed images.

So scrubbing and WBFS are different, except that nearly all tools scrub an image if storing as WBFS.

 

[TiMeBoMb4u2]

Wiimm's explanation was WAY better than mine. I was tired and not thinking the clearest. Either way, I think you get the idea... Scrubbing allows the game image to be stored in a considerably smaller size while still maintaining game stability.

 

[qwertymodo]

I'm not sure, but i think a .wbfs file contains the data of the game 1:1 the way it would be stored on a wbfs partition.

.wbfs files are not 1:1, they are scrubbed to remove garbage padding data from the image. They can also be split at 2 or 4gb in order to support FAT32 (which cannot support files >4gb)

Split files don't change the format, and games on wbfs partitions are already scrubbed. Do you mean that there's still some junk in those and the .wbfs files are scrubbed further?

I read your post as if there was a comma between 1:1 and "the way it would be stored on a wbfs partition", implying wbfs stores 1:1 images (as opposed to a scrubbed image). I see now that's not what you meant.