Phison PS5031-E31T 2TB Technical Preview (E31T Controller)

We used CrystalDiskMark 8 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.

Random Reads

In the QD1-QD8 random read tests the drive produced smooth increases in performance as the queue depth deepened without any noticeable dramas. At QD1 the drive speed ranges from 21,624 IOPS (88.57MB/s) using a single thread up to 92,847 IOPS (380.30MB/s) using four threads. At a QD of 8, the single-thread performance had increased to 159,103 IOPS (651.66MB/s) while the four-threaded test reached 454,761 IOPS (1,862.70MB/s).

Random Writes

In the 4K write tests, the performance rose quickly from QD1 to QD2 for all four tested threads with the fastest rise seen in the three and four-threaded tests. All four threads see the performance start plateauing out from QD2 onwards up to the end of the test run at QD8.

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