I have been using HDTach for many years now and always find it is an invaluable benchmark to ascertain potential levels of performance. HD Tach is a low level hardware benchmark for random access read/write storage devices such as hard drives, removable drives (ZIP/JAZZ), flash devices, and RAID arrays. HD Tach uses custom device drivers and other low level Windows interfaces to bypass as many layers of software as possible and get close to the physical performance of the device.
Again, the average MB/s rate scores under 70 MB/s with the burst rate just over 230 MB/s. This clearly shows performance limitations of a 5,400 rpm 2.5 inch ‘eco friendly’ drive.