Linux 5.4 EXT4 / XFS / Btrfs RAID Performance On Four HDDs

Recently a Phoronix reader inquired about seeing some fresh hard drive RAID benchmarks on the current kernel release and using Btrfs / EXT4 / XFS. While we don't often look at HDD RAID performance these days compared to speedier SSD testing, since the reader was a generous Phoronix Premium member I was happy to oblige to his test request. Here is a look at the Linux 5.4 HDD RAID performance per his request with Btrfs, EXT4, and XFS while using consumer HDDs and an AMD Ryzen APU setup that could work out for a NAS type low-power system for anyone else that may be interested.