its not a hexos issue but rather cmr drives don't play nice with raid in general.
if you use raid with your drives you are not gonna have a good time regardless of os.
you can still use them but they will be slow as sin
if you can return then you can get a significantly better value at the same price or less
https://www.ebay.com/itm/236143802502
this is in the same price range, sold by seagate themselves, almost double the size, cmr drive and a more vibration resistant enterprise drive.
you can probably find even better values since this was less when i bought it a month or 2 ago.