Back in the 1980's I ran a large computer repair facility for GE. We repaired lots of Data General S140, S200 and MV4000 Eclipse minicomputers and peripherals used in GE CT and MR scanners.
The disk drive used on those early GE CT/T8800 and CT/T9800 systems was a Data General Zebra. It was the size of a clothes washer, weighed 500 pounds and ran on 208v 3-phase power. Oh, and it would hold 200MB on a removeable disc pack.
Now THAT was a man's drive! None of this weeney SD card stuff.