

Hibernating my computer and then forgetting about it and booting into a different OS (Fedora Silverblue) on the same partition (BTRFS subvolume stuff). AND THEN TRYING TO RESUME THE HIBERNATED OS (Arch btw).
my filesystem was pretty much unrecoverable and it was my fault
My theory for what happened is:
There might have been some delayed writes on Arch, but that’s no the main issue.
When booting into Fedora and running an update, the state of the filesystem changed to the point that when resuming Arch, it put the filesystem into an extremely inconsistent state (where the Arch system might have cached (meta)data that was changed since hibernation).
Also, to clarify, I still managed to recover my data, but the FS was not mountable and btrfsck couldn’t do shit. And I’m still using that Arch install to this day. XDDD