The newer and slower (!) shingled magnetic recording [SMR] hard drives are so slow that you cannot put these into a RAID configuration!
In fact, the legal lawsuits may now be starting...
Western Digital faces a lawsuit over the specs of some of its hard drives
www.notebookcheck.net/Western-Digital-f ... 601.0.html
w0qj wrote: ↑Wed May 27, 2020 9:51 pm...But we do insist that all of our data backup storage is done on PMR hard disks (perpendicular magnetic recording) for longer data archival survival.
...We don't use the newer shingled magnetic recording [SMR] hard drives; these are MUCH slower and subject to write amplification.