I am looking for a way to mimic mdadm's behaviour and have btrfs mount a degraded array on boot as long as it's not broken (specific use case: RAID1 with a single disk missing/dead) So far the only thing I could think of (and I've seen suggested elsewhere) is to add the "degraded" mount option in kernel command line and in /etc/fstab. But on the wiki I read that this is a bad idea because of what they call "Incomplete chunk conversion" issue [1] that says I can only mount it degraded (when it is actually missing a disk) rw ONE TIME and then the filesystem would go ro. Is that still a thing? Are there other ways of doing what I want? -Alberto 1. https://btrfs.wiki.kernel.org/index.php/Gotchas#raid1_volumes_only_mountable_once_RW_if_degraded
