@Quarnero I guess I’m at beginner’s level. I’m in a loop here. Only when I select “abort” I get the following message.
“!!! Unable to mount /boot
New value of PCR[4]: «some-hash-value»
!!! Starting recovery shell
~#”
How can I get the machine recognizing the USB Flash Drive?
( FYI @JeromeMorrow Use Pureboot recovery shell to set up boot from USB? )