Ive done this, flashed a thumb drive and installed on an old laptop. It didnt have the specs required to do everything but I wanted to see if Id like it. I did, a lot. So i bought one of their machines.
https://docs.start9.com/0.3.5.x/flashing-guides/os-x86
It's pretty standard as far as Linux based installs go. Admittedly I opted for TrueNAS instead.
Discussion
ok, looks like I finally got it running.
Turns out it was a simple line I needed to add to the yaml volumes:
- /home/umbrel/umbrel/app-data/bitcoin/data/app:/data/app. (I added this line and it made it work)
Thanks for listening. Once it syncs I plan on migrating to knots, but this is fantastic!
Fun times, at least I'm learning something along the way, too.
Bitcoin kicks ass! (as we all know here, 😂)
Is /data your mount point for your second drive?
This looks specific for the Bitcoin core app so you may be able to just do the same to knots after you install it so it just points to the same directory.
Interested to see if that works and persists through app upgrades