Version and / or Patch Used: 3.0 Technical Preview
Developer Homepage: http://crystalmark.info
Product Homepage: http://crystalmark.info/software/CrystalDiskMark/index-e.html
Download here: http://crystaldew.info/category/software/crystaldiskmark
CrystalDiskMark is a disk benchmark software that allows us to benchmark 4K and 4K queue depths with accuracy.
* Sequential reads/writes
* Random 4KB/512KB reads/writes
* Text copy
* Change dialog design
* internationalization (i18n)
Note: Crystal Disk Mark 3.0 Technical Preview was used for these tests since it offers the ability to measure native command queuing at 4 and 32.
Here we get our first look at incompressible data on the SX300. The sequential reads stay high and the 4K reads are approaching 35 MB/s. The new SX300 with 20nm flash doesn't scale well when commands are stacked.
Our review sample shipped with firmware 5.0.Be, the same that was on our ADATA M.2 sample back at Computex. We're still coming to terms with the new firmware and the new 20nm flash. At this point we don't know if the firmware or the flash is slowing the 4K reads when we ratchet the drive up with more commands.
One thing is for sure, the combination of 20nm and 5.0.Be firmware doesn't do incompressible writes any favors. I had to double check to make sure I wasn't testing the SX300 128GB that I also have in my office.
With the 128GB class SandForce drives, we talk about a brick wall in this test. The 256GB drives have never had an issue with a sudden stop in performance, the SX300 doesn't really do it either, but the result is even worse. We measured a very good 4K QD1 write score, but the sequential writes are horrid with incompressible data.
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