Seagate's fraudulent hard drives scandal deepens as clues point at Chinese Chia mining farms

Chip burners that can overwrite the SMART data aren't expensive. I've also seen "refurbished" drives in which nobody even bothered to reset that data. In that case, the refurbishment apparently consists of a new sticker on the drive (sticker serial number not even matching the drives EPROM).

I dont think its a specific thing, more of a vague descriptor for values they used

Otherwise known as the average runtime of a drive in a Datacenter. Those drives almost never go to sleep and usually only get replaced when they die or are upgraded. Some SANs are only replaced once every 7 years and still have running drives in them.