Struggling to open UHD discs on BU40N

[joehockings]

Hi, I'm after some help as I'm new to this and would like to start ripping my 4k UHD disc collection to use for plex.

I've been using the guide (Ultimate UHD Drives Flashing Guide Updated 2025) as well as a couple of YouTube videos but I have yet to be successful with fully opening a 4k Blu Ray. For context, I've ripped DVDs and standard Blu-Rays just fine.

I've attached an image of what my version of MakeMKV looks like as well as the file I used to flash it in case there are any glaringly obvious errors! I have tried opening The Martian 4k, The Dark Knight 4k, Turning Red 4k, Black Panther 4k, Avengers Infinity War 4k and now as another test Harry Potter and the Philosopher's Stone 4k (of which I have included the dump file for reference)

Whenever I do try to open a UHD disc, some common errors I have had are:

'Error 'Scsi error - NOT READY:LOGICAL UNIT IS IN PROCESS OF BECOMING READY' occurred while reading 'BD-RE HL-DT-ST BD-RE BU40N 1.03 MO2P6A84502' at offset '655360''

'Can't read AACS Vid from disc - most likely current AACS host certificate is revoked by your drive'

'Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - KEY NOT PRESENT'

'Error 'Scsi error - NOT READY:LOGICAL UNIT IS IN PROCESS OF BECOMING READY' occurred while reading 'BD-RE HL-DT-ST BD-RE BU40N 1.03 MO2P6A84502' at offset '1082968064'

So far I have tried: re-flashing the optical drive, restarting the drive/pc, unplugging other items using same USB area on motherboard (to try help with power issues maybe?) and making use of the KeyDB helper as well and I've so far come up empty on all fronts. Any help or advice would be greatly appreciated as I'm pulling my hair out with this one!

PS. I am from the UK and have UK 4k discs, if that makes any difference!

[MrPenguin]

Hi, I'm after some help as I'm new to this and would like to start ripping my 4k UHD disc collection to use for plex.

Firstly, MakeMKV should almost certainly know how to decrypt this disk already. The reason you are struggling is probably because your drive cannot enable LibreDrive, and so bus encryption is still enabled.

Has MakeMKV been able to connect to the Internet to download both the LibreDrive microcode and the hashed keys database?

There should be a file called _private_data.tar in the same directory where your TGZ dump file was created. (This is MakeMKV's "data directory", i.e. C:\Users\johoe\MakeMKV in your case.) Check whether this _private_data.tar contains a file like:

Code: Select all

sdf_000000a3.bin

If it doesn't then you can download it manually from http://www.makemkv.com/svq/sdf.bin. Copy this file into MakeMKV's data directory and restart MakeMKV.

As an aside, the AACS/MKB_RO.inf file inside your TGZ dump file has been truncated to only 56 bytes, which makes it useless to anyone trying to add your disk to the public KEYDB database. Could you compress the AACS/MKB_RO.inf file from your physical UHD disk, upload it into (say) Google Drive or OneDrive, and then reply here with a public download link please?

[joehockings]

Hi! Thank you so much for your reply, I've done some troubleshooting and MakeMKV has definitely been able to connect to the internet as far as I can tell, it is enabled under preferences and the sdf_000000a3.bin file is in the _private_data.tar folder as well. However, I am still getting the same errors and am unabel to open a 4k disc.

On that note, I did have a question as to if that folder should remain compressed or if it should be extracted if this makes any difference at all?

Is there a way that I can check specifically if the internet connection is being made or not? Are there any error codes that will be present if there is no connection?

Re. the AACS/MKB_RO.inf file inside the TGZ dump file, I have tried extracting the file to upload and share it but it is still coming out as 56 bytes unfortunately.