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Just watched some videos on btrfs. I start to understand the conceps. Perhaps I should also look into how exactly
On windows and the "recovery partion". I guess what you say is that it should always be possiblity to boot in some kind of system, but it will not happen automatically as there is no way for a system to detect that the system completely hangs.
Thinking about it. It kind of strange. Embedded systems have watchdog interrupts that get fired if the system hangs (i.e. if it does not provide a "yes, I still live" signal every "x" milliseconds). Does a PC not have something similar?
embedded systems have the advantage of all using a single bootloader: Uboot, so the error path is always known and the software knows how to fallback.
With x86_64 systems it's a mixed bag, and maybe the windows and linux bootloader knows what to do, but in most cases it will just signal an error and stop