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Toshiba THNSNF256GCSS 'Thin Sniff' 256GB SSD Preview

By: Chris Ramseyer | SSDs in Storage | Posted: Jan 30, 2013 7:10 am
Manufacturer: Toshiba

HD Tune Pro


Version and / or Patch Used: 4.00

Developer Homepage:

Product Homepage:


HD Tune is a Hard Disk utility which has the following functions:


Benchmark: measures the performance

Info: shows detailed information

Health: checks the health status by using SMART

Error Scan: scans the surface for errors

Temperature display


HD Tune Pro gives us accurate read, write and access time results and for the last couple of years has gained popularity amongst reviewers. It is now considered a must have application for storage device testing.





As we mentioned the THNSNF has a single queue depth limit when reading data from the drive. The average of a single request is 263MB/s. Later in this review we'll look at the overall speed with multiple read requests. The sequential read performance at QD1 is higher than the OCZ Vertex 4 when it launched. Firmware, a beta release later given to the public under the name 1.4.2 increased the speed to 300MB/s. Given that THNSNF is a built to order drive, system builders should be able to ask for changes to where the QD limit is at.




THNSNF also has a version of storage mode (as opposed to performance mode), just like Vertex 4. We know OCZ hates it when we label these two distinct modes of operation, at least the engineer responsible for Vector doesn't like it. Just like with the OCZ drives, THNSNF wouldn't fall back to storage mode when under normal use. You have to write to a large span of the drive all at once to drop performance. This test just happens to highlight the drop since it uses a 64KB block size.



HD Tach - Sequential Write Performance After Random Writes




By now most of our daily readers know we run a lot of tests and only a few make it into our reviews. In 2013 we're finally rolling this test out. The test isn't new, we have data going back three years with HD Tach sequential performance measured just after the six tests in HD Tune Pro. Just before HD Tach, we run the Random Read, then the Random Write test in HD Tune Pro. This allows us to get the test drive closer to consumer steady state for the more significant tests later in the review.


The reason why we are so methodical when testing, always running the same tests in the same order with the same amount of time between tests, is because what you write to the drive previously affects the next test.


In this new published test we see the effect of random writes just before a sequential write across the drive. This test also illustrates the effectiveness of foreground garbage collection. We'll start charting these results in future reviews. The THNSNF scores an average write speed of 190.2 MB/s.

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