On 2/12/21 2:10 PM, jim stephens via cctalk wrote: > The company I'm thinking of had 5 1/4" drive, and appropriate media > size. I think your 400 or 500mb size rings familiar. There were several; the one I'm working with is 470/470MB double-sided 5.25" Very similar in size and looks to a PMC MO 5.25" cartridge. --Chuck