Running A Btrfs RAID Array Across Four USB 3.0 Flash Drives
The FIO results are in MB/s, higher is better. Due to the Git revision used during testing, it didn't render on the graph.
Compared to SSD tests of Btrfs RAID arrays, the RAID 5/6 performance is particularly very poor across the USB flash drive tests but in general RAID'ing USB flash drives weren't yielding performance gains except for RAID0 and RAID10 compared to running these disk tests on a single flash drive.