The final refinement of the 5 1/4 inch disk, called high-density, pushed this all the way to a whopping 1.2MB. A later innovation called double-density allowed both sides of the disk to be formatted, which helped to bump up the total to 360K. These first DOS disks could be formatted to hold 160K of data on one side of the disk. You could bend them, though they probably would not work afterwards. The original IBM PC used 5 1/4 inch floppy disks that were really floppy. For DOS disks, that is FAT-12.ĭisks come in various sizes and densities. Part of this formatting process is installing a file system. An unformatted disk cannot be used until it has been formatted. Formatįormatting a disk prepares it to receive data. For a complete look at these commands, you should look them up in the DOS Help System. Please note that in this discussion we will not cover every possible use of these commands, or every possible switch or argument pertaining to them. The starting point has to be the commands that are probably used the most in DOS, to prepare a disk and copy files. We will now begin looking at some of the commands you need to master to be proficient at DOS.
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