Multiple Hard Drive Diagnostics Hardware

Does anyone have suggestions for a device that formats/diagnoses 10-12 HDDs at a time?

Hopefully one that doesn’t require we mortgage the business! LOL

Seriously, we need a cost effective solution. Our company used somewhere north of 25-30TB in drives a day, and receive at least 2-5 back each day in RMAs.
We have been using the Administrative Console and the SeaGate propietary tools, but this only does one drive at a time. Our backlog is approaching 100x drives needing testing.

Any help would be well received!