Conclusion

I hadn’t expected the Hitachi HTS721010G9AT00 to prove to be much different from the HTS721010G9SA00 model because these two drives differ in the interface only. The potential performance of the hard disk itself is far from fully utilizing even the classic Parallel ATA interface, let alone Serial ATA. And my expectations came true in practice: there’s indeed little difference between these two models.

However, it is the Parallel ATA version of the drive that has been a little but better of the two in most of the tests. Since the two drives from Seagate have proved to be generally slower than their opponents, it is the Hitachi HTS721010G9AT00 that can be considered the fastest 100GB hard disk drive with a spindle rotation speed of 7200rpm among all that we have tested in our labs so far.