Yes, it may work in a pinch for short-term solutions, but I don't advise it. I tried an experiment with a 1.4MB disk in March 1995. I formatted it as 800K (with a Plus) and stuck a few Kid Pix documents on it. I used it in two different Macs--an SE SuperDrive and an LC--and after about six days of being accessed about three-four times daily it conked out.

The disk was pretty messed up--I couldn't reformat it as a 1.4MB--it said it was damaged. Your mileage may vary, but that's my story.

There's a good section in the older editions of Mac Secrets on this topic.