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HP Z Turbo 512GB PCIe SSD Review - With RAID 0 Numbers

By: Chris Ramseyer | SSDs in Storage | Posted: Dec 13, 2014 12:15 am
TweakTown Rating: 93%Manufacturer: HP

Sequential Mixed Read / Write Workloads


In this series of tests, we measure mixed workload performance. We start with 100% read, and then add data writes to the mix in 10% increments until we get to 100% writes. We believe this will be the next major area SSD manufacturers will address, after performance consistency.


Sequential Mixed Workload Bandwidth




The mixed workload test will not run on a software array, so the Z Turbo array isn't present in this test. However, we do see HP's custom firmware allowing the Z Turbo to operate at a higher speed than a base Samsung XP941 512GB drive at most of the measurement points.


Sequential 80% Read / 20% Write Bandwidth




You might notice that two drives are not listed in this test. Both use the same RAID controller, and both error after a few hours into the test. The all-in-one RAID products do really well in the tests where the drives are preconditioned, and run in steady state. The performance difference in the mixed workload test between the Z Turbo with HP's custom firmware and the standard Samsung XP941 firmware is even more interesting. We haven't found an update for the base XP941 SSD, and finding one may be difficult since Samsung sells the drive as an OEM product.


Random Mixed Workload Response Time




The random mixed workload IOPS test allows us to address drives by drive letter, and not just by physical drive number. In this test, we see the RAID array with two 512GB Z Turbo drives scaling very well at high queue depths.

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