RAID 0 4K Random Read/Write
Each QD for every parameter tested includes 300 data points (five minutes of one second reports) to illustrate the degree of performance variability. The line for each QD represents the average speed reported during the five-minute interval.
4K random speed measurements are an important metric when comparing drive performance, as the hardest type of file access for any storage solution to master is small-file random. One of the most sought-after performance specifications, 4K random performance is a heavily marketed figure.
Both arrays provide outstanding performance, with the WD Se setting the tone early with a blistering 779 IOPS average at QD256. The WD Red trails with 582 IOPS at QD256.
The WD Se does not win by as large a margin with read activity, the average of 617 IOPS at QD256 beats the Red by only 50 IOPS.
Our write percentage testing illustrates the varying performance of each solution with mixed workloads. The 100% column to the right is a pure write workload of the 4K file size, and 0% represents a pure 4K read workload.
Both drives provide good performance with the mixed workloads, though they both hit a bump in the road with 90% write data suffering a dip in performance.
The Red loses in the latency test, with more of its access taking longer to complete.