Back in the day when a 4x CD-ROM burner was a luxury, we got a phone call from a customer we shipped a CD to. Would not read. Did a second burn at 1x speeds,

Back in the day when a 4x CD-ROM burner was a luxury, we got a phone call from a customer we shipped a CD to. Would not read. Did a second burn at 1x speeds, tested on several machines, and mailed out the disk. Would not read. Burned a third and tried on every unique setup we could find on the most premium disk we could buy. Would not read. I drove out to do the manual install a stack of media in hand. Got to the customer site - and watched in horror as they put the CD-ROM in the 5.25" floppy drive. It fits.