The Commodore Amiga computers used other kinds of floppy disk optimizations for extra storage. One was to not use sectors, and instead write an entire track as a single object with no stop or start information which normally takes up some 10% of the disk. They combined this with a variable sector format similar to the Mac, but without the complexity of the variable-speed drive (in retrospect, one wonders why Apple developed this solution at all). These changes add up to allowing considerably better storage capacity of about 880KB on a DD floppy, and 1.76MB on HD.