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CrystalDiskMark is a useful benchmark to measure theoretical performance levels of hard drives and SSD’s.
The Seagate FireCuda 120 doesn't seem to handle CrystalDiskMark's deeper queue depth test too well as sits in the bottom third of our results chart.
The latest version of CrystalDiskMark, version 7, includes a couple of profiles that can be used for testing – Peak Performance and Real World. The result screens for these two profiles not only display MB/s results but also IOPS and latency.
Looking at the Peak Performance results for Sequential read/write performance we could confirm both official Sequential performance figures. The drive is rated up to 560MB/s for reads and up to 540MB/s for writes. Under testing the 2TB FireCuda 120 produced read/write figures of 561MB/s and 542MB/s respectively.
Seagate quote 4K random performance for the drive as up to 100,000 IOPS for reads and up to 90,000 IOPS for writes. In the Peak Performance profile, the best read figure produced by the drive was 99,458 IOPS with writes at 90,821 IOPS, confirming the official figures.
We also used CrystalDiskMark 7 to test the random performance of the drive at lower queue depths (QD1 – QD8 where most of the everyday workloads occur) using 1 to 4 threads.
Using a single thread the drive produced a read figure of 68,802 IOPS (281MB/s) at the QD8 mark. Using 2,3 and 4 threads the drive produced figures of 98,204 IOPS (402MB/s), 99,225 IOPS (406MB/s) and 99,503 IOPS (407MB/s) respectively.
In the write tests, the most dramatic leap in performance was with a single thread from QD1 (34,926 IOPS) to QD4 (85,833), after which the performance tailed off slightly.
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