(…)
This is about some error entries in the system journal, which I encountered
during copying this ISO image over. The respective transcripts are provided
inline, as well as attached in the form of plain text files.
(…)
I believe this is unrelated to the copying process. udevd stopped
responding for `WatchdogSec` seconds,⁽¹⁾ systemd restarted it. This kind
of reports are usually associated with some specific piece of hardware
leading to udevd lock-up, and no less often the bug is resolved in later
kernel releases.
You may try passing `udev.log_level=debug` to kernel command-line
during boot. See if that produces any useful info, but also note that
this log level is very spammy.
Cheers
____
⁽¹⁾ See `man systemd.service`
