I'm converting a BTRFS drive to a RAID 1 with another drive. I've never done it before and BTRFS is kinda "different".

>risking over 2TB of data

:sweating:

I mean, it's just media and backups. Even if I lost it, I'd only know what I lost thanks to the tree I make of my files.

Still, it'd be very annoying. I don't have another drive to push it all to. 

>90% complete mirror

huzzah