Toshiba’s THNSNH we have tested today is a most extraordinary product. Its controller is directly related to Marvell's and it employs high-quality 19nm Toshiba flash memory with Toggle Mode 2.0 interface, which makes it similar to the Plextor M5 Pro in many respects, yet its behavior is completely different. Its performance is rather mediocre in synthetic benchmarks, but it is outstanding in real-life applications.
The secret of the Toshiba THNSNH series is that it can very efficiently process a stream of heterogeneous requests. This must be the goal of the optimizations implemented by Toshiba engineers. As the result of them, the Toshiba THNSNH256GCST can match Plextor’s M5 Pro and OCZ Vector across many real-life loads.
This is, however, only true until the SSD is filled with data by more than 50%. After this threshold, its writing performance degenerates, making it a less attractive solution, but it still offers high performance in real-life applications that do a lot of reading.
So if you are not into benchmarking competitions and do not need an SSD for server applications, the Toshiba THNSNH will be quite perfect as a system SSD for a notebook or desktop PC. It won't let you boast with your benchmarking results, but it won't disappoint you in everyday applications, either. The price factor is important too: this drive costs a little less than high-speed SSDs from other brands.
Besides the low performance in synthetic benchmarks and the performance hit upon being filled with data, the Toshiba THNSNH has some other downsides. Its availability is low. It comes without any accessories and its warranty period is only 1 year. Hopefully, we'll see better retail products from Toshiba in the near future because the company seems to be very good at making consumer-class SSDs.
To help you with your choice, we offer the following summary table with test results of various SSDs. It contains basic hardware information about SSDs we’ve tested so far and allows to quickly determine the general position of a particular model among its competitors in terms of relative performance.