Although it apparently has no impact on performance, the following message appears, regarding one of my two internal drives/burners:
MakeMKV v1.6.5 win(x64-release) started
Error 'Internal error - Input parameter is incorrect (811)' occurred while reading 'DVD+R-DL HL-DT-ST DVD-RAM GH15L FD5D' at offset '524288'
Error 'Internal error - Input parameter is incorrect (811)' occurred while reading 'DVD+R-DL HL-DT-ST DVD-RAM GH15L FD5D' at offset '1048576'
Error 'Internal error - Input parameter is incorrect (811)' occurred while reading 'DVD+R-DL HL-DT-ST DVD-RAM GH15L FD5D' at offset '32768'
Error 'Internal error - Input parameter is incorrect (811)' occurred while reading 'DVD+R-DL HL-DT-ST DVD-RAM GH15L FD5D' at offset '524288'
Error 'Internal error - Input parameter is incorrect (811)' occurred while reading 'DVD+R-DL HL-DT-ST DVD-RAM GH15L FD5D' at offset '1048576'
Error 'Internal error - Input parameter is incorrect (811)' occurred while reading 'DVD+R-DL HL-DT-ST DVD-RAM GH15L FD5D' at offset '32768'
It appears to be completely harmless - but annoying ;>}