One guy is selling an old computer from the 1980's. Here is a picture he sent me about the hard drives. What is the interface used in this hard drive?
The interface is ST-506, used for MFM and RLL hard drives from that particular era:
https://en.wikipedia.org/wiki/ST-506#Interface_to_controller
Nice old Seagates!
That one vintage computer enthusiast brony.
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No ST-412 interface?? Would just read whats written on the labels of these drives.
~ At least it can do black and white~
The only real difference that I seem to recall between ST506 and ST412 in terms of the interface was the ST506 used a higher current for signalling but electrically they are compatible.
I'm putting my bets on both drives being the famous ST225. They are considered the most reliable hard drive ever built.
"It's science. I ain't gotta explain sh*t" 
