thanks for looking.
About the errors I’ll translate his answer. "This are HDD sata errors and messages uit de kernel logs. They are coming from the HDD’s themself. Checked the backplane errors and they seem fine. "
He did an install himself and luckily after an hour or so Roon crashed. (again after a restart of the NAS, done from the PC) These are the latest Roon logs.
Don’t know what to do next. QNAP is not convinced yet.
Dimitri