Drive Samsung SSD 850 EVO 250GB hdparm -t /dev/sda Timing buffered disk reads: 1562 MB in 3.00 seconds = 520.17 MB/sec Drive AMD R5SL128G 128GB SSD hdparm -t /dev/sdb Timing buffered disk reads: 1424 MB in 3.00 seconds = 474.07 MB/sec Drive Seagate ST3500418AS 500GB hdparm -t /dev/sdc Timing buffered disk reads: 344 MB in 3.00 seconds = 114.65 MB/sec