Thanks for your message!
Generally, Hard Disk Sentinel is designed for data protection, to monitor and report problems related to the drives, allow ways to diagnose and fix hard disks.
Yes, benchmarks are nice - just not the most important in this field.
But yes, I agree that they should be added, so in a later version there can be some more
Currently, yes, you may use the Disk menu -> Random Seek Test (which is designed to test the seek / servo element).
Also you may use Disk menu -> Surface test -> Read test to diagnose the complete disk surface and get accurate information about the complete disk performance. This acts like a benchmark, showing complete transfer rates for all parts of the hard disk, not only min/max values, just (because it checks all data sectors) it also verifies that are there any problems with the hard disk - or not, so it is more detailed.
