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Unformatted text preview: Jelena Mamenko Operating Systems Lecture Notes on Operating Systems 58 2-inch 1985 720 5-inch Perpendicular 1986 ] 100 MiB 3-inch HD 1987 1440 1.44 MB 3-inch ED 1991 2880 2.88 MB 3-inch LS-120 1996 120.375 MiB 120 MB 3-inch LS-240 1997 240.75 MiB 240 MB 3-inch HiFD 1998/99 150/200 MiB ] 150/200 MB Acronyms: DD = Double Density; QD = Quad Density; HD = High Density ED = Extended Density; LS = Laser Servo; HiFD = High capacity Floppy Disk The marketed capacities of floppy disks frequently corresponded only vaguely to their their actual storage capacities; the 1.44 MB value for the 3-inch HD floppies is the most widely known example. See reported storage capacity. Dates and capacities marked ? are of unclear origin and need source information; other listed capacities refer to: For 8-inch: standard IBM formats as used by the System/370 mainframes and newer systems For 5- and 3-inch: standard PC formats, capacities quoted are the total size of all sectors...
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- Spring '09
- Operating Systems