So I had a working install with the /boot on SD and everything else on the USB key originally installed using the OSMC installer.
This has worked great until recently when the USB key seems to have corrupted itself. I’m currently running fsck -c on it but it does not look promising.
So my question is that I have still a perfectly serviceable SD boot drive. Is there a way to change a flag/setting so as to force the reinstall of OSMC onto a new replacement USB key without having to start from scratch?