This will be enforced at the discretion of the moderators. Posts and comments that don't follow this rule will immediately be removed and users may be banned.Īdvertisements are not allowed unless it comes with some benefit to the /r/discgolf community. Part of what makes Disc Golf so great is the community. We throw frisbees for fun and come here to have fun talking with other people on the internet about much we enjoy throwing frisbees.
The size of a 3 + 1 ⁄ 2-inch (90 mm) disk, they are capable of holding close to 20.8 MB, but need a special drive.Please keep the discussion civil. Many (but not all) certified "double sided" 8- and 5 + 1 ⁄ 4-inch floppies had an index hole on both sides of the disk sleeve to make them usable as flippy disks.Ī combination floppy disk and optical disc, known as a Floptical disk exists. Like TPI, "double sided" was mostly a certification indicator, as the magnetic media was usually recordable on both sides. Quad density 5 + 1 ⁄ 4-inch disks were rare, so it was not uncommon to use higher quality double density disks, which were usually capable of sustaining the 96 TPI formatting of quad density, in drives such as the Commodore 8050.ĭisks were available in both single and double sided forms, with double sided formats providing twice the storage capacity. Because of the similarity in magnetic characteristics between some disk types, it was possible to use an incorrectly certified disk in a soft sectored drive. GCR was also used on some platforms, but typically in a "double" density form.Ĩ- and 5 + 1 ⁄ 4-inch floppy disks were available with both soft sectoring and hard sectoring. Subsequent use of the term "density" referred to physical characteristics of the media, with MFM assumed to be the logical format used. Originally, single density and double density indicated a difference in logical encoding on the same type of physical media: FM for single, and MFM for double. The term density has a double meaning for floppy disks. TPI was not a part of the physical manufacturing process it was a certification of how closely tracks of data could be spaced on the medium safely. Logical and physical layout of data in a floppy diskĭifferent floppy disk types had different recording characteristics, with varying magnetic coercivity (measured in oersteds, or in modern SI units in amperes per meter), ferrite grain size, and tracks per inch (TPI).
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