> One more data point about BTRFS, is that it doesn't support parity-stripe based redundancy models (raid5/6, raidz{1..n}, etc), which makes it less interesting for a lot of people.
It does however support raid1 on multiple drives, and raid1c3 and raid1c4 for increased redundancy.
With Btrfs raid1, you can pool I.e 4 drives, meaning it will store 2 copies of each file on different devices. It’s not your traditional raid1. With raid1c3 it will store 3 copies of each file, and raid1c4 stores 4 copies.
So while technically not raid5, a 3+ drive Btrfs raid1 pool will provide almost the same redundancy. Think of it more like raid10.
It does however support raid1 on multiple drives, and raid1c3 and raid1c4 for increased redundancy.
With Btrfs raid1, you can pool I.e 4 drives, meaning it will store 2 copies of each file on different devices. It’s not your traditional raid1. With raid1c3 it will store 3 copies of each file, and raid1c4 stores 4 copies.
So while technically not raid5, a 3+ drive Btrfs raid1 pool will provide almost the same redundancy. Think of it more like raid10.