1. Introduction2. WD Blue SN550 1TB3. Testing Methodology4. CrystalDiskMark5. ATTO Disk Benchmark6. AS SSD7. IOMETER8. 128KB Sequential Performance9. 4K Random Read v QD Performance10. 4K Random Write v QD Performance11. 4K 70/30 Mixed Performance12. Throughput13. PCMark 8 - Storage Consistency14. PCMark 8 - Individual Test Suites15. PCMark 8 Storage Test - Individual Test Suites16. Performance Stability17. Cache Performance18. Performance v Capacity19. Real Life File Testing20. Closing Thoughts21. View All Pages

CrystalDiskMark is a useful benchmark to measure theoretical performance levels of hard drives and SSD’s. We are using v6.0.

The new SN550 drive is not only faster than the previous generation Blue SN500, but it's also faster than both versions of the WD Black SN750 drive at a fairly deep queue depth of 32 in CrystalDiskMark.

At a QD of 1, the SN550 has a slightly faster read performance than the SN500 and both WD Black SN750's but the SN750 has slightly better write performance.

We are also starting to test with the latest version 7 of CrystalDiskMark which has a couple of built-in profiles, Peak Performance and Real World.

 

 

 
The test results from CrystalDiskMark 7 confirm the official figures for both Sequential (up to 2,400MB/s reads, 1,950MB/s writes) and 4K random (up to 410,000 IOPS reads, 405,000 IOPS writes) performance.

The real-world profile Sequential results are a little lower than both the default and peak performance results but that is due to the test being done at a QD of 1 with 1 thread, which is where most of the everyday tasks are undertaken.

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