Drive Hitachi HTS543232A7A384 320GB hdparm -t /dev/sda Timing buffered disk reads: 202 MB in 3.00 seconds = 67.24 MB/sec Drive HGST HTS545050A7E680 500GB hdparm -t /dev/sdb Timing buffered disk reads: 288 MB in 3.01 seconds = 95.73 MB/sec Drive Colorful CN500 240GB hdparm -t /dev/sdc Timing buffered disk reads: 1612 MB in 3.00 seconds = 537.17 MB/sec