Version and / or Patch Used: 3.0 Technical Preview
Developer Homepage: http://crystalmark.info
Product Homepage: http://crystalmark.info/software/CrystalDiskMark/index-e.html
CrystalDiskMark is a disk benchmark software that allows us to benchmark 4K and 4K queue depths with accuracy.
CrystalDiskMark gives us our first taste in this review of working with incompressible data. The SandForce architecture deals with incompressible data a little differently than compressible data. Data that can be compressed is done so at the controller and then stored on the flash. When you compress data it takes on a smaller size so less data has to be written to the flash. Incompressible data, data that is already compressed, can't be reduced to a smaller form or at least reduced enough to effect performance. Incompressible data is transferred slower than compressible data using SandForce controllers. Key Features:-* 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.
Starting with the 4K read performance, we see the SuperSSpeed S301 SLC taking the 120/128GB charts performance lead. This is only by a small margin but a lead is a lead. When we get to the 4 command read the S301 outperforms the other SandForce controlled drives by a solid 30MB/s or more depending on the drive. By the time we get to 32 commands the S301 takes off with a massive lead. The Marvell and Indilinx Infused drive are very good when the commands are stacked with incompressible data but the S301 does a good job of closing that gap.
Normally we use CDM for looking at 4K and NCQ performance, but since this is our first look at working with incompressible data, we'll also look at the sequential performance as well.
The SandForce SF-2281 / MLC drives seem to hit a brick wall around 170MB/s. The OCZ Vertex 3 MaxIOPS seems to defy this rule, but not by much. We see now that this issue has more to do with the flash and less to do with the controller.The SuperSSpeed S301 SLC goes way beyond the 170MB/s incompressible write limits in both sequential and 4K tests. The performance in this test is amazing; class leading for SandForce controlled drives and the 4K at depth writes are unbelievable given what we've long considered a weak point for SandForce.
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