HD Tach 3.0.1
The four HD Tach metrics that we sampled for each drive are Random Access, which is largely dependent on spindle speed of the drive, Read Average, Write Average and Burst Read throughput. Again, Read and Write Average scores are what we would consider the most meaningful to the end user. On the other hand, Burst Read is typically tied to a drive's on-board cache and SATA interface speed.
Looking at the results we've obtained from HD Tach's tests, we find a scenario which is very similar to what we initially saw with SiSoft Sandra. Here, the Barracuda ES slightly trails the Barracuda 7200.10 though they are both at the top of the group in terms of performance. The only drive which comes close to giving the two latest drives from Seagate a serious run for their money is the Western Digital WD5000KS, though the drive's less than stellar Burst Read performance was clearly its Achille's heel.