Drive Samsung SSD 850 EVO 250GB hdparm -t /dev/sda Timing buffered disk reads: 1488 MB in 3.00 seconds = 495.77 MB/sec Drive SanDisk Corp. Extreme 63GB hdparm -t /dev/sdb Timing buffered disk reads: 538 MB in 3.01 seconds = 178.95 MB/sec