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drknight71 wrote: ↑

Thu Dec 26, 2024 6:22 pm

Hi,

Spent christmas hacking my BDR-211M trying to roll back the firmware. So far unsuccessful but have a theory. Think the reason that my attempt to flash an older firmware ultimately failed was because the kernel on the drive was updated as well when I originally updated the rom. Thing is if you look into the firmware upgrade package ver 1.54 there are two binary files included. One in the hex identifies itself as a kernel file. So by hacking the firmware update utility to bypass version check in theory if I had a copy of a previous kernel firmware perhaps it may be possible to roll back because the ver 1.54 firmware utility once hacked and packaged with old firmware files for both kernel and rom should do the trick. Maybe maybe not but if any one has the ability to dump this firmware file from pre 1.54 firmware and share it I would appreciate it. Thank you.

drknight71 wrote: ↑

Thu Dec 26, 2024 6:22 pm

Hi,

Spent christmas hacking my BDR-211M trying to roll back the firmware. So far unsuccessful but have a theory. Think the reason that my attempt to flash an older firmware ultimately failed was because the kernel on the drive was updated as well when I originally updated the rom. Thing is if you look into the firmware upgrade package ver 1.54 there are two binary files included. One in the hex identifies itself as a kernel file. So by hacking the firmware update utility to bypass version check in theory if I had a copy of a previous kernel firmware perhaps it may be possible to roll back because the ver 1.54 firmware utility once hacked and packaged with old firmware files for both kernel and rom should do the trick. Maybe maybe not but if any one has the ability to dump this firmware file from pre 1.54 firmware and share it I would appreciate it. Thank you.

drknight71 wrote: ↑

Thu Dec 26, 2024 9:57 pm

Your right I failed. Unfortunately my hack requires that the names of the firmware files be as the utility expected it to be. Inserting the S11 roms you gave me into the 154 flash utility using resource hacker caused issues with the hacked utility unable to find the S8800601.154 file and complaining it was too old. Tried changing the headers to match the s8800600.154 headers and got error message that it failed flashing the kernel. Its a miracle it didn't brick so it still works. Maybe there are referrences in the utility that need to corrected. Maybe changing the headers on those roms was a mistake. Would need help so at this point giving up. Will post my hacked file or offer it via pm such that others might want to add to it fixing the name referrences to the inserted kernal and rom firmware files. Maybe thats not enough and even if you could get the pioneer utility to take it the drive probably will still block it. Was fun anyhow. At least I learned how to use Ida...

Thanks

MartyMcNuts wrote: ↑

Thu Dec 26, 2024 11:53 pm

drknight71 wrote: ↑

Thu Dec 26, 2024 9:57 pm

Your right I failed. Unfortunately my hack requires that the names of the firmware files be as the utility expected it to be. Inserting the S11 roms you gave me into the 154 flash utility using resource hacker caused issues with the hacked utility unable to find the S8800601.154 file and complaining it was too old. Tried changing the headers to match the s8800600.154 headers and got error message that it failed flashing the kernel. Its a miracle it didn't brick so it still works. Maybe there are referrences in the utility that need to corrected. Maybe changing the headers on those roms was a mistake. Would need help so at this point giving up. Will post my hacked file or offer it via pm such that others might want to add to it fixing the name referrences to the inserted kernal and rom firmware files. Maybe thats not enough and even if you could get the pioneer utility to take it the drive probably will still block it. Was fun anyhow. At least I learned how to use Ida...

Thanks

Don't bother posting the file/s. As we've mentioned, we've already tried this multiple times among other things.