The 3x20TB btrfs setup I mentioned is configured with RAID1C3 for metadata, and RAID1 for data, and works just fine with even or odd number of drives.
It's funny how people assumed RAID5 when they saw 3 drives.
I switched to this after years of running on ZFS, and for my workloads btrfs is faster on Linux (not to mention the licensing/packaging mess).
The 3x20TB btrfs setup I mentioned is configured with RAID1C3 for metadata, and RAID1 for data, and works just fine with even or odd number of drives.
It's funny how people assumed RAID5 when they saw 3 drives.
I switched to this after years of running on ZFS, and for my workloads btrfs is faster on Linux (not to mention the licensing/packaging mess).