I’ve been reading your post with great interest and have been waiting for answers to these type of questions:
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Are you using a current version of Manjaro KDE? I assumed KDE because the original post mentioned KDE Partition Manager.
-
How are you mounting – what commands or what applications?
- Are you using KDE’s Disk & Devices applet.
-
Did you use
lsof
to find out what applications had files open on the drive? -
What commands are you using to unmount? Are you using
sync
?sync
can take a long time (<>60 seconds maybe) depending on the type of data and the device. -
What’s being logged to the journal
-
Last boot in reverse (“q” to exit)
journalctl -b -r
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Or, follow the log messages as they occur (“ctrl-c” to exit). Note, start before you mount device
journalctl -f
-
-
Need to know more about your hardware: