Blu-Ray reading problem solved after downgrade

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MachOne
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Blu-Ray reading problem solved after downgrade

Post by MachOne »

Automatically translated from French.

Santa treated us well with news this morning, and a bit late he delivers us one last one. Arodd from PSX-Scene managed to restore Bluray playback for FAT PS3s, which had been lost during downgrading (the problem was the loss of the DRL1/DRL2 files).

The current method, shown below, is a bit complicated and requires solid PC knowledge as well as a Blu-Ray drive and a hex editor. However, we can expect a homebrew in the coming days to make these manipulations easier.



Here's what it's about:



There is now a "safe" method to perform a downgrade without risk for users who don't have the ability to back up their drl files. This method can also be used to fix a ps3 with the BluRay playback issue, as long as you remember the last movie watched on your console.

Indeed, some playback data is kept in a file that gets updated with the hexadecimal values of the DRL to restore Bluray playback.

Let's assume The Dark Knight was the most recent movie your PS3 played, and that the data below will be used to restore BluRay playback.

We discovered that the title's MKB, which updates your drl files, can be used to restore what's missing for BluRay playback. The MKB data is located at BD: / / AACS / MKB_RO.inf; If you use a BluRay drive on windows, mac, linux...etc, then you can extract this data. We're working on a direct method on PS3, but so far it seems GAMEOS blocks this file.

If you open this file in a hex editor, you should get this ...

namely: 10 00 00 0C 00 04 (MKB version) 10 03 00 00 00 09 - The Dark Knight

Then, the HRL ....

21 00 00 6C (length) 00 00 00 07 00 00 00 07 00 09 FF FF 00 00 00 0B 00 00 FF FF 00 00 00 16 00 08 FF FF 00 00 00 21 00 03 FF FF 00 00 00 35 00 04 FF FF 00 00 00 4E 00 03 FF FF 00 00 00 54 00 03 FF FF 00 00 00 73 5E 2B F1 7E 29 D4 04 7D 74 84 21 1E 3F 35 42 EB FE 3E B9 B9 B1 63 57 86 7D AF F4 1A 02 A9 33 61 96 51 67 0A 27 5A 5C 8A - The Dark Knight

Then the HRL with the DRL data.

20 00 00 34 (length) 00 00 00 00 00 00 00 00 44 8F F5 FA B4 79 A3 B9 FD FC 92 01 35 21 5C 3B D9 8C D3 20 06 B0 76 B5 46 92 1E 46 52 16 A5 5D EE 1E 7B 2D 02 C7 6D 0A - The Dark Knight

Combining the record type and version with the DRL data gives you the contents of the DRL1/DRL2 hex files, if that disc was the most recent one your PS3 played. This is called a partial MKB.

IE: 10 00 00 0C 00 04 10 03 00 00 00 09 20 00 00 34 00 00 00 00 00 00 00 00 44 8F F5 FA B4 79 A3 B9 FD FC 92 01 35 21 5C 3B D9 8C D3 20 06 B0 76 B5 46 92 1E 46 52 16 EE A5 5D 1E 2D 7B 02 C7 6D 0A

The hex file above should restore BluRay playback. It's not foolproof, because if you watched a movie with a more recent MKB, this trick won't work. Overall you just need to know which is the most recent movie you've watched, and maybe you'll be able to restore your drive. That said, don't forget that a homebrew is in the works.

SOURCE L.S

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