Taken from LinuxInsight (http://linuxinsight.com/how_fast_is_your_disk.html). A c program to measure random I/O of a disk. Some clones are included in the clone/ directory, and my modifications will be added once I find them!
All credits to the original authors.
Example;
chad@myhost:~$ sudo ./seeker /dev/sda
Seeker v2.0, 2007-01-15, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda [122104MB], wait 30 seconds..............................
Results: 14847 seeks/second, 0.07 ms random access time