Specifically BTRFS's RAID5/RAID6 implementation is unstable and susceptible to data loss. Facebook doesn't use those RAID levels in production. https://www.pho

Specifically BTRFS's RAID5/RAID6 implementation is unstable and susceptible to data loss. Facebook doesn't use those RAID levels in production. https://www.phoronix.com/scan.php?page=news_item&px=Btrfs-Warning-RAID5-RAID6 https://www.phoronix.com/scan.php?page=news_item&px=Btrfs-Wa... https://btrfs.wiki.kernel.org/index.php/Gotchas#Parity_RAID https://btrfs.wiki.kernel.org/index.php/Gotchas#Parity_RAID