games broken with WIA compression

Discussion in 'Wii - Hacking' started by eadmaster, Sep 25, 2015.

  1. eadmaster
    OP

    eadmaster Advanced Member

    Newcomer
    71
    2
    Oct 31, 2006
    Italy
    Since i am about to compress all the wii games i currently have in WBFS format to WIA,
    are you aware of any game that gets broken after the compression?
     
  2. GreyWolf

    GreyWolf GBAtemp Psycho!

    Member
    3,847
    736
    Mar 2, 2015
    United States
    I think WIA is only for storage purposes. You won't be able to play the games without restoring them to ISO or WBFS format.
     
  3. mike333

    mike333 GBAtemp Advanced Fan

    Member
    708
    61
    Aug 30, 2010
    Poland
    Please provide examples of image content degradation during WIA de/compression.

    @Wiimm
     
  4. PokeAcer

    PokeAcer Banned

    Banned
    1,431
    1,055
    May 28, 2015
    United Kingdom
    Wales
    WIA cannot be read by any USB loader, unless someone's made one.
    Wiimm made it for compression when stored on HDD, same with WDF.
     
  5. Wiimm

    Wiimm Developer

    Member
    2,154
    365
    Aug 11, 2009
    Gambia, The
    Germany
  6. eadmaster
    OP

    eadmaster Advanced Member

    Newcomer
    71
    2
    Oct 31, 2006
    Italy
    I knew WIA is only for storage purposes, but after reading this thread i suspect some games could be broken after decompressing f.i. because they do internal integrity checks or access the files in unusual ways...
     
  7. Wiimm

    Wiimm Developer

    Member
    2,154
    365
    Aug 11, 2009
    Gambia, The
    Germany
    If you use the --raw option for both conversions (ISO to WIA to ISO), the complete images with all fillers (waste) are converted and the final ISO is the same as the original one. But all my experience says, that you never need the fillers/padding. Just leave all existing partitions including UPDATE and CHANNEL (default of my tools).

    And wit have other nice commands: DIFF and FDIFF
    wit diff image1 image2 differs 2 images of any format, but without the fillers. Use --raw to compare 2 images in virtual ISO base.
    wit fdiff image1 image2 (fdiff = file-diff) differs on file level. This is good for new composed or patched images.
     
  8. eadmaster
    OP

    eadmaster Advanced Member

    Newcomer
    71
    2
    Oct 31, 2006
    Italy
    ok, thank you for the tips, i'll try with the default settings and if something gets broken i'll report it back.
    Btw do you think it is worth keeping the update partition?

    Side question:
    When extracting the compressed WIAs to a FAT32-formatted SD, do i need to update the disc.info manually to make the cfgUSBLoader find them?
    (I've seen WiiBaFu still does not support FAT32 partitions)
     
    Last edited by eadmaster, Sep 29, 2015
  9. TecXero

    TecXero Technovert

    Member
    2,814
    906
    Apr 13, 2014
    United States
    Mainframe
    I can't think of any reason to do so. Even USB Loader GX removed the update partition by default when dumping.
     
  10. Wiimm

    Wiimm Developer

    Member
    2,154
    365
    Aug 11, 2009
    Gambia, The
    Germany
    No!
    But is takes so less space, that I decided for myself to achive the update partitions too. Maybe I need them for analysis.
     
    PokeAcer likes this.