![]() Here is an example of bending the rules and using a format that is not intended for the media type: FdFormat has a neat trick where it can put 80 tracks on a double density disk. You can do it with an advanced formatting program and make it work on a high density diskette, but that diskette won't be readable in a standard 360K drive - the media is the wrong type and the tracks are too close together. But most floppy diskette formatting programs also force the double density data rate when you specify that format, which is a no-no for high density media. You can put a 360K filesystem format on a high density disk - that just means you are using 2 sides, 40 tracks and 9 sectors per track out of the 2 sides, 80 tracks, and 15 sectors per track that are available. You get into trouble when you try to force it one way or the other with the wrong media type. They adjust the write current to suit the media. High density drives can work with both types of media. ![]() (Contrast this with an old hard drive, where low level formatting is done as a separate step.)ĭouble density media is different than high density media. ![]() ![]() When formatting a floppy drive both are done in the same pass. Keep in mind that there are two levels of formatting going on - low level and filesystem level. ![]()
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