Unformatted text preview: Jelena Mamčenko Operating Systems Lecture Notes on Operating Systems 58 2-inch 1985 720 ← 5¼-inch Perpendicular 1986 ] 100 MiB ← 3½-inch HD 1987 1440 1.44 MB 3½-inch ED 1991 2880 2.88 MB 3½-inch LS-120 1996 120.375 MiB 120 MB 3½-inch LS-240 1997 240.75 MiB 240 MB 3½-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 ¹The marketed capacities of floppy disks frequently corresponded only vaguely to their their actual storage capacities; the 1.44 MB value for the 3½-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 5¼- and 3½-inch: standard PC formats, capacities quoted are the total size of all sectors...
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This note was uploaded on 12/29/2011 for the course CSE 362 taught by Professor Mavin during the Spring '09 term at SUNY Stony Brook.
- Spring '09
- Operating Systems