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Toshiba PX02SS 12Gb/s SAS3 Enterprise SSD Review

By: Paul Alcorn | SSDs in IT/Datacenter | Posted: Apr 2, 2014 2:03 pm
TweakTown Rating: 92%Manufacturer: Toshiba

8k Random Read/Write






8k random read and write speed is not tested for consumer use, but for enterprise environments, this is an important aspect of performance. With several different workloads relying heavily upon 8k performance, we include this as a standard with each evaluation. Many of our Server Emulations below will also test 8k performance with various mixed read/write workloads.


The average 8k random read speed of the Toshiba PX02SS measures an outstanding 100,277 IOPS at 256 OIO, while the Toshiba PX02SM takes the low road with 88,549 IOPS. The HGST falls into the middle of the pack with 91,622 IOPS.


This excellent tuning for 8k performance is key to performance in many enterprise workloads, particularly the transactional environments the PX02SS is designed for.




All three SSDs exhibit a tight latency range during the 8k random read test.




The PX02SS experiences significant variability while managing an average of 29,714 IOPS at 256 OIO. The PX02SM provides less variability, but it also provides a lower average of 16,391 IOPS at 256 OIO. The HGST leads the group with a very consistent average of 32,878 IOPS at 256 OIO.




Both Toshiba SSDs experience significant latency variability, particularly with the heavier workloads. The PX02SS's redeeming quality is the much lower latency results that bring the average down.




The 8k mixed test reveals exactly why we target different write mixtures. As our testing has already revealed, the PX02SS dominated the 8k read category, but it fell to the HGST in the write testing. However, we find a diamond in the rough with the PX02SS as it dominates the middle of this chart. The mixed 8k performance of the PX02SS, though it does suffer some variability, is an obvious strength of the drive. This superb performance in the mixed 8k workloads should translate directly to our server workloads, which is where we dive into mixed 8k workloads with more granularity.




Power consumption for the PX02SS averages 5.84 watts during the measurement window, and the HGST requires 7.60 watts.




The PX02SS leads in the efficiency test with an average of 5,103 IOPS-per-Watt, while the HGST measures 4,159 IOPS-per-Watt.

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