AIDA64 Random Access Time
AIDA64 offers several different benchmarks for testing and optimizing your system or network. The Random Access test is one of very few if not only that will measure hard drives random access times in hundredths of milliseconds as oppose to tens of milliseconds.
Drives with only one or two tests displayed in the write test mean that they have failed the test and their Maximum and possibly their Average Scores were very high after the cached fills. This usually happens only with controllers manufactured by JMicron and Toshiba.
Access times are what make SSDs 'feel' quick and it doesn't matter how many platter drives you add to an array, you will never get SSD like access times. I've added the WD VelociRaptor back to this chart so you can clearly see how much quicker the Mercury Extreme Pro 6G is when compared to the world's quickest consumer platter drive.
Void of moving parts and mechanical latency, the Mercury Extreme Pro 6G is able to access data much faster than even the platter drive, but it is also quicker than some of the other SSDs as well.