I saw a post on the forum asking if BTRFS RAID5/6 is still a big no-no and given the lack of information out there, it's kinda funny how some outdated noises can reverberate for so long. So let's clarify.   The reason BTRFS RAID5/6 has been marked as "unstable" is due to this seemingly mysterious problem called "write hole". A write hole happens when there's unclean shutdown (most commonly due to power outage but could also be due to for example a kernel crash) causing the pari
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