call me anonymous on Nostr: For Bitcoin full node, you can keep the blockchain, it is in the datadir directory. ...

For Bitcoin full node, you can keep the blockchain, it is in the datadir directory.

When you reinstall bitcoin core, you can point it to this dir and you will not need to download the whole blockchain again.

It should work. Unless the files got corrupted.

For lightning node, I don't know, but if a channel is closed, I cannot be reopened, I think.

The backup recovery, I guess may abd should work.

Good luck.