What do you know today that you didn't know yesterday?

[Angrboda]

Newer hard drives of 6 TB or more do not have the middle screw holes that older hard drives had. I just populated a server with seven 8 TB drives but didn't run into the issue because those specific drives didn't need the middle screw hole removed in their design, so they had the traditional three holes per side. I dodged a bullet there as I spent $600 on those drives and they wouldn't have worked properly in my NAS case if they had the newer hole arrangement.