Error 'OS error - STATUS_DEVICE_NOT_CONNECTED' occurred while reading <file> at offset <offset>'
Posted: Wed Sep 10, 2025 4:17 am
Having an issue where MakeMKV can correctly identify all titles on a video, but cannot save them. I get the dreaded: "Copy complete. 0 titles saved, 2 failed" message.
Skip to the bottom to see my device information. Full log is attached. The title of the post is the first error that occurs, but there are others:
I know there is not an issue with the disc itself, as the video files can play just fine: 
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Pastebin link in case attached log does not work: https://pastebin.com/1jd1CJik
My device info:
* Windows 11 (Version 10.0.26120 Build 26120) desktop
* Unitek Y-3324 USB SATA adapter
* MakeMKV v1.18.1
* HL-DT-ST BD-RE Model # WH16NS40 , Mfg date July 2024, S/N: 507HAMG269899, SVC Code: NS50, ROM version: 1.05
Skip to the bottom to see my device information. Full log is attached. The title of the post is the first error that occurs, but there are others:
Code: Select all
002003:0000 Error 'OS error - This device does not exist' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '27000832'
002003:0000 Error 'OS error - The volume for a file has been externally altered such that the opened file is no longer valid' occurred while reading '\Device\CdRom0' at offset '27000832'
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Pastebin link in case attached log does not work: https://pastebin.com/1jd1CJik
My device info:
* Windows 11 (Version 10.0.26120 Build 26120) desktop
* Unitek Y-3324 USB SATA adapter
* MakeMKV v1.18.1
* HL-DT-ST BD-RE Model # WH16NS40 , Mfg date July 2024, S/N: 507HAMG269899, SVC Code: NS50, ROM version: 1.05