BU40N Flash Hangs

[tauceti]

I'm trying to flash a BU40N drive from version 1.05 -> 1.03 (see further below for full details of the drive). However, when I run the command:

makemkvcon f -d 'dev_21:4' -f /tmp/sdf.bin rawflash main -i /tmp/HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934.bin

It hangs forever with no progress. I am able to still use the drive after killing the command.
Followed instructions from viewtopic.php?p=181425#p181425 to flash on a linux device. I have no disc in the drive.

How can I troubleshoot this? I include more details below. Thanks!

Command:

makemkvcon f -l
Found 2 drives(s)
00: dev_21:4, /dev/sr1, /dev/sr1
HL-DT-ST_BD-RE_BU40N_1.05_212404231347_MOBP4291705

[omitted second drive]

md5sum of the two files used:

$ md5sum sdf.bin HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934.bin
602b0be6847e9623f7454ac2b87df80d sdf.bin
74ebaf627d2aac5f899191d6caceb54c HL-DT-ST-BD-RE_BU40N-1.03-NM00000-211810241934.bin

• sdf.bin is from https://makemkv.com/sdf.bin

• firmware is from https://drive.google.com/file/d/1HRnbXi ... 0FCdM/view

Drive Info:

Drive Information
OS device name: /dev/sr1
Manufacturer: HL-DT-ST
Product: BD-RE BU40N
Revision: 1.05
Serial number: XXX
Firmware date: 2124-04-23 13:47
Bus encryption flags: 17

LibreDrive Information
Status: Possible, not yet enabled
Drive platform: MT1959

No disc inserted

[Billycar11]

well you dont have enc but thats probably not the problem though
last few version have a flashing bug on linux go back to 1.17 and try with enc and it should work and go to 1.00 after 1.03 as on linux there is also a bug that 1.03mk does not work only the de fw does