I'm having this debate with a friend who is looking for a box of single-sided, single-density 5.25 floppy disks on eBay for one of his old computers.
I told him he could buy any 5.25 floppy disks he wanted, since both properties (sidedness and density) were a property of the disk drive, not the floppy. Floppy disk manufacturers certified both sides of these 5.25 disks, regardless if they were sold as SingleSided or DoubleSided. This was because there wasn’t any standard on where (top or bottom) the read/write head is in any particular drive. Density, likewise, depends on the drive – it’s just a different logical structure to how the tracks are laid out on the disk during formatting. Physically, there’s no difference between a SingleDensity and DoubleDensity disk.
He says I’m wrong about this. He thinks there’s a difference, particularly on the physical magnetic medium of the disk itself (a “single-density” disk isn’t capable of being formatted in the “double-density structure”.
So who wins this argument?
(I should clarify, we're not talking about HD disks, we both agree there's a physical difference with these).