CrystalDiskMark is a useful benchmark to measure theoretical performance levels of hard drives and SSD’s. We are using V6 to test HDD drives.
In the CrystalDiskMark 4K QD32 T1 test, the 22TB WD Red posted the best read score to date for a mechanical hard drive of 3.658MB/s. Its write performance of 4.586MB/s is the fastest we've seen for a drive aimed at NAS use but it's way behind the four enterprise focussed drives we've tested; WD's Ultrastar DC HC560 and the three Seagate Exos drives.