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8KB Random Read And Write

Seagate Enterprise Performance 10K v8 And TurboBoost HDD Review
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To read more on our test methodology visit How We Test Enterprise HDDs, which explains how to interpret our charts. We cover 8KB random performance measurements on page two, latency measurements on page five and power measurements on page six

The Seagate Enterprise Performance 10K v8 scores another win with 8K random write data across the board. The Toshiba’s slight dip in performance at QD4 is more pronounced with 8K data. The WD Xe only challenges during heavy workloads, but still falls shy of matching the Seagate 10K v8 offerings. We also note the steady improvement over the previous-generation Seagate 10K v7.

The latency-to-IOPS measurements also indicate a pronounced Seagate lead in the all-important low-QD testing, and highlight that the Xe has a scaling performance issue at lower queue depths. The Xe looks impressive at the top end of the scale, but its latency reaches an untenable level by the time it picks up steam. 

The Seagate HDDs trailed the competing HDDs with 4K random read data by a large margin, but we observe the Seagate offerings narrowing the gap during heavy QD workloads with the more-common 8K random data. However, the other contenders continue to maintain an advantage under lighter load (QD 4-64). The Seagate offerings also offer impressive power consumption metrics overall — on a watts-per-GB basis, they easily best the competition. The WD Xe actually takes the lead in 8K random read testing, in stark contrast to its performance in the pure random write workloads.

The WD Xe challenges in the mixed workload testing, but the Seagate 10K v8 HDDs continue to take the clear lead in 10 out of 11 measurement windows. The TurboBoost model exhibits a slight performance advantage over the standard model as we reach heavier write workloads (90-100%), likely due to the residual benefits of the NVC-backed DRAM caching feature enabled by the NAND cache. The Toshiba AL13SEB and the Seagate 10K v7 both fall into a lower performance envelope during the write mixture testing, particularly as we mix in heavier write activity. The Xe offers great performance in the write mixture testing, but it is important to note that this is only with a high queue depth of 256.