2TB SATA III HDD via USB 3.0/2.0 external enclosure 500GB SATA II HDD via USB 2.0 external enclosure Both hooked up to Raspberry Pi, no hubs or other USB devices being used
Both disks are mostly empty. Since USB 2.0 is supposed to be 480Mbit/s, and the drives can probably do 50-100MB/s reading/writing. I would expect at least 10-20MB/s transfer speed, but I'm only getting around 5MB/s. Any ideas?