HD Tach is a physical performance hard drive test that uses a special kernel mode VXD to get maximum accuracy by bypassing the file system.
The HD Tach sequential read test is a little bit different from other benchmarks. Most benchmarks create a file on the hard drive and test within that file. The problem is that modern hard drives use a zone bit recording technique that allows different read speeds depending on where the data is located. Data on the outside of the drive is much faster than data recorded on the inside.
This rate depends on the track location, so it will be higher for data on the outer tracks (where there are more data sectors) and lower toward the inner tracks (where there are fewer data sectors).
Overall we see roughly 93 MB/sec performance, which is substantial and perfectly fine.
When we look at write performance we still get close to 75 MB/sec in this test, that's decent perf for a product like this. And sure, we test SSDs mostly, so that does make any HDD a bit of a stranger in these charts :)
Samsung 850 EVO SSD review In this review we test the 500GB Samsung 850 EVO SSD. The new SSD is a stunning series of storage technology As it is enthusiast class fast yet made to be very competitive in pricing. Armed with truck...
Samsung 850 Pro SSD review In this review we test the 1TB Samsung 850 Pro SSD. A lovely piece of technology. An SSD that is extremely fast and actually amongst the handful of fastest storage units we have ever tested. Head on o...
Samsung 840 EVO SSD review In an all new article we test, benchmark and review the Samsung 840 EVO SSD. With the EVO Samsung raises the bar though as the SSD 840 EVO was designed to deliver more speed and even better reliability.
Samsung 840 Pro SSD review In this article we test, benchmark and review the Samsung 840 Pro SSD. What a stunning piece of technology this is. An SSD that is extremely fast and actually amongst the handful of fastest storage units we have ever tested. Head on over into the review.