Sony 3.5” floppy disks used to be variable speed. I knew about that at the time I interviewed for a position as an intern at Imprimis in 1989, just before they

Sony 3.5” floppy disks used to be variable speed. I knew about that at the time I interviewed for a position as an intern at Imprimis in 1989, just before they got bought by Seagate. The guy I was interviewing with smiled smugly and said “we’ve got a better solution — we vary the speed at which we read and write data!” As a result of that job, I ended up writing what I believe to be the first FAQ for hard drives and stiction — in 1989. I haven’t been able to find a copy of it, however. Dunno if there would be any useful information in that FAQ for the OP, but it would be interesting to check it out and see. That is, if anyone can find a copy.