CrystalDiskMark is an easy-to-run and quick utility to use to gauge a drive’s performance. It measures sequential read and write performance and random read and write speeds of random 4KB, 4KB (queue depth 32) and 512KB data.
The WD Black 4TB drive exhibited strong read and write speeds on the sequential and 512k workloads as it was convincingly quicker than the 1TB variant of the WD Black and also the old VelociRaptor drive. However, it lost its advantage when coming to the 4k and 4k, 32 queue depth workloads. While the previously reviewed 1TB VelociRaptor drive was no match for SSDs, it was leaps and bounds ahead of all the drives here.