I need a relatively fast hard drive (random access). For the same amount of money, I could buy WE Velociraptor (250GB, 10kRPM) or WD Red (1TB, 5400? RPM). SSDs or 15kRPM drives are too expensive even though they are faster.
Now, obviously with a larger drive (assuming I store the same amount of data) the head would not have to move as far, however, the faster drive most likely moves the heads faster in addition to having lower rotational latency.
Of course if two drives have the same capacity then the one that spins faster is faster.
IS there a way to determine from published specs which drive would be faster?