Using hdparm it’s pretty easy to find out your disk’s readLinux Consultant – Disk Speed speed. hdparm is actually an entire IDE/SATA management utility.
Firstly, ensure that you have the tool – apt-get install hdparm
Once done, quite simply use hdparm with -t or -T options to time buffered reads and cache reads respectively. Be VERY careful about other options that hdparm offers, some are very dangerous and can completely corrupt your data.
Timing buffered disk reads: 200 MB in 3.00 seconds = 66.57 MB/sec
apnic03:~# hdparm -T /dev/sda
Timing cached reads: 4372 MB in 2.00 seconds = 2187.38 MB/sec