Detect HDD Speed

detect_speed.sh

#!/bin/sh
for i in 1 2 3; do sudo hdparm -tT /dev/sda; done

#/dev/sda:
# Timing cached reads:   9676 MB in  2.00 seconds = 4839.70 MB/sec
# Timing buffered disk reads: 326 MB in  3.01 seconds = 108.28 MB/sec
#
#/dev/sda:
# Timing cached reads:   9910 MB in  2.00 seconds = 4957.12 MB/sec
# Timing buffered disk reads: 292 MB in  3.01 seconds =  97.15 MB/sec
#
#/dev/sda:
# Timing cached reads:   10040 MB in  2.00 seconds = 5022.03 MB/sec
# Timing buffered disk reads: 318 MB in  3.00 seconds = 105.98 MB/sec