Below are images of an ESDI drive from my IBM PS/2. I had pulled everything out of the chasis to properly clean and remove some very old and melting foam. The drive is just wonderously large, compared to a 3.5” sitting next to it. This drive still works and boots the Windows 3.1 that was installed on it when I first acquired this machine.

ESDI Drive pic 1

ESDI Drive pic 2