Samsung SM863 & PM863 SSD Review (960GB)

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 QD32 until the drive is in a steady state. Finally, we cycle through QD1-32 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.

Samsung PM863 960GB 8K Write Precondition Samsung SM863 960GB 8K Write Precondition

During our 8KB testing we can see again that both drives exhibit great consistency with minimal deviation.

Samsung SM863 & PM863 8K Read IOPSSamsung SM863 & PM863 8K Read Lat

During 8KB reads the SM863 and PM863 both show much better performance than our comparison drives from QD1 all the way to QD32.

Samsung SM863 & PM863 8K Write IOPSSamsung SM863 & PM863 8K Write LatIn 8KB write testing we see a similar result to that of our 4KB test with the Crucial M510DC outperforming the PM863, but not the SM863. Performance of the PM863, however, is much improved over the 845DC EVO.

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