Just copy the lines from the link in your terminal (you are supposed to run Perl and don’t forget, as I did first, to adjust the path to your disk ;) ) :
Laptop with Hitachi 100 Mb, 7200 rpm (OpenSuse 10.2) :
Took 24.57s for 1500 seeks of /dev/hda (93 GB)
Mean: 16.4ms; Median: 14-15ms; Std dev: 10.6ms
Server with Hitachi 80 Gb and 120 Gb, 7200 rpm, 8 Mb of cache (Debian 4.0) :
Took 20.15s for 1500 seeks of /dev/hda (76 GB)
Mean: 13.4ms; Median: 12-13ms; Std dev: 5.64ms
Took 19.5s for 1500 seeks of /dev/hdb (115 GB)
Mean: 13ms; Median: 11-12ms; Std dev: 3.77ms
Conclusion : I am pretty satisfied by the performances of my laptop disk.
Thanks to the author for this nice script.