You are probably right, bad idea. Where can I find the proper official procedure to replace a failed drive (i.e. which cannot be mounted anymore) in a RAID1 ar

You are probably right, bad idea. Where can I find the proper official procedure to replace a failed drive (i.e. which cannot be mounted anymore) in a RAID1 array (with 2 drives) ? I found these 2 links: https://unix.stackexchange.com/questions/334228/btrfs-raid1-how-to-replace-a-disk-drive-that-is-physically-no-more-there https://unix.stackexchange.com/questions/334228/btrfs-raid1-... https://unix.stackexchange.com/questions/227560/how-to-replace-a-device-in-btrfs-raid-1-filesystem https://unix.stackexchange.com/questions/227560/how-to-repla... But it is written there that if 'replace' doesn't work, it can take up to 5 days using add/remove for only 100GB ! I haven't found any official procedure on the Btrfs wiki.