Miscompare between a DICF and an MDS image of a CD-XA disc #268

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claunia · 2026-01-29T15:14:44Z

claunia commented

2026-01-29 15:14:44 +00:00

Originally created by @TheRogueArchivist on GitHub (Aug 27, 2019).

Prerequisites

Are you running the latest version?
Can you reproduce the problem in the debug version?

Check and fill as appropiate:

I was running DiscImageChef under Windows 7...
...in 32-bit

Description

Comparing a DICF image with and MDS image from A120% results in a miscompare with the message "Sector 37160 has different sizes (2324 bytes in image 1, 2048 in image 2) but are otherwise identical". Where image 1 is the DICF image. The disc is CD-XA, which is probably relevant since I haven't tested those kinds of discs as thoroughly.

Link to images: https://drive.google.com/file/d/156urY4aqtkI5VN6a7CG_eZY8qRx44San/view?usp=sharing

Exact command line used:

dotnet .\DiscImageChef.dll compare ".\RAHJONGG.dicf" ".\RAHJONGG.mds"

Output of command execution with debug output enabled

DiscImageChef 4.5.99.1693-00000000 built by DESKTOP-8B4K7NM in Debug
Copyright c 2011-2019 Natalia Portillo

Input file 1 format identified by DiscImageChef format.
Input file 2 format identified by Alcohol 120% Media Descriptor Structure.
Uploading statistics
Comparing disk image characteristics
Comparing sectors...
Comparing sector 37161 of 37161...
Disc image 1: .\RAHJONGG.dicf
Disc image 2: .\RAHJONGG.mds
Image sector size differ
Sector 37160 has different sizes (2324 bytes in image 1, 2048 in image 2) but are otherwise identical
Images differ

Originally created by @TheRogueArchivist on GitHub (Aug 27, 2019). ### Prerequisites * [X] Are you running the latest version? * [X] Can you reproduce the problem in the debug version? ### Check and fill as appropiate: * [X] I was running DiscImageChef under Windows 7... * [X] ...in 32-bit ### Description Comparing a DICF image with and MDS image from A120% results in a miscompare with the message "Sector 37160 has different sizes (2324 bytes in image 1, 2048 in image 2) but are otherwise identical". Where image 1 is the DICF image. The disc is CD-XA, which is probably relevant since I haven't tested those kinds of discs as thoroughly. Link to images: https://drive.google.com/file/d/156urY4aqtkI5VN6a7CG_eZY8qRx44San/view?usp=sharing ### Exact command line used: dotnet .\DiscImageChef.dll compare ".\RAHJONGG.dicf" ".\RAHJONGG.mds" ### Output of command execution with debug output enabled ``` DiscImageChef 4.5.99.1693-00000000 built by DESKTOP-8B4K7NM in Debug Copyright c 2011-2019 Natalia Portillo Input file 1 format identified by DiscImageChef format. Input file 2 format identified by Alcohol 120% Media Descriptor Structure. Uploading statistics Comparing disk image characteristics Comparing sectors... Comparing sector 37161 of 37161... Disc image 1: .\RAHJONGG.dicf Disc image 2: .\RAHJONGG.mds Image sector size differ Sector 37160 has different sizes (2324 bytes in image 1, 2048 in image 2) but are otherwise identical Images differ ```

claunia closed this issue

2026-01-29 15:14:45 +00:00

claunia commented

2026-01-29 15:14:45 +00:00

@TheRogueArchivist commented on GitHub (Nov 19, 2019):

Issue still present, but not all CD-XA discs are affected. Dumps don't match the sectors of a dump from DiscImageCreator or Alcohol 120%. Trying to convert the image iso is successful, but spams the console with ""Error Incorrect data size writing sectors x to y, continuing..." for most if not every sector. ImgBurn doesn't recognize the resulting iso file when trying to verify it compared to the disc. The verify command finds no issues with the dicf image but isn't able to recognize the iso file either. Possibly a bug when it comes to reading data out of a dicf image again? Link to images, logs, etc.: https://drive.google.com/drive/folders/1Mkgecz24uqMNB2qYflSlLHJ2aHeXT0bZ?usp=sharing

@TheRogueArchivist commented on GitHub (Nov 19, 2019): Issue still present, but not all CD-XA discs are affected. Dumps don't match the sectors of a dump from DiscImageCreator or Alcohol 120%. Trying to convert the image iso is successful, but spams the console with ""Error Incorrect data size writing sectors x to y, continuing..." for most if not every sector. ImgBurn doesn't recognize the resulting iso file when trying to verify it compared to the disc. The verify command finds no issues with the dicf image but isn't able to recognize the iso file either. Possibly a bug when it comes to reading data out of a dicf image again? Link to images, logs, etc.: https://drive.google.com/drive/folders/1Mkgecz24uqMNB2qYflSlLHJ2aHeXT0bZ?usp=sharing

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Reference: aaru-dps/Aaru-aaru-dps#268