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8KB RANDOM READ/WRITE
To measure 8KB random read/write performance do the same preconditioning as we did for 4KB performance. The drive is first secure erased to get it in a clean state. Next, the drive is filled by sequentially writing to the RAW NAND capacity twice. We then precondition the drive with 8KB random writes at QD256 until the drive is in a steady state. Finally, we cycle through QD1-256 for 5 minutes each for writes and then reads. All this is scripted to run with no breaks in between. The last hour of preconditioning, the average IOPS, and average latency for each QD is graphed below.
Again, just as was with 4K preconditioning results, we can see that the 8K results have many outliers that double the average. Latency mainly ranges from 3.9ms-4.3ms and averages about 4.2ms. IOPS range from 58K to 68K with an average of 62K.
During the lower QD1-QD4 portions of this test the Techman XC100 was beat out by the HGST SN100, however, from QD8-256 it took the lead, outperforming the both comparison drives by a decent margin. At QD256 it reached 390K IOPS, 10K more than its rating.
Writes prove yet again to be a weak point when compared to our other test drives. From QD8 on the XC100 maintains an average of 60K IOPS, better than the 55K IOPS rating given by the manufacturer. Latency just passes the 4ms mark at QD256 as well.