Does WD’s DOS HDD Diagnostics support HGST hard drives?
Phone Tech Support for HGST and WD gave me opposite answers (HGST said No, WD said Yes).
(I’m sure I don’t need to explain why it’s important to be able to run HDD diagnostics outside one’s OS. HGST has no bootable HDD diagnostics of it’s own that supports HDD >2TiB.)
Incidentally, I like WD Data Lifeguard Diagnostic for DOS, now at v5.27; when I bought a 6TB WD Black drive I found v5.25 didn’t support it, so I phoned WD Tech Support, and the very next day they posted v5.27 which does support bigger HDDs (so far I’ve only tried it on 6 and 8 TB HDDs).