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MFM encoding

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  • RLL encoding —    An efficient method of storing information on a hard disk. Compared with older, less efficient methods, such as modified frequency modulation encoding (MFM), RLL encoding effectively doubles the storage capacity of a disk.    See also advanced …   Dictionary of networking

  • Modified Frequency Modulation — This article is about Modified Frequency Modulation. For other uses of MFM, see the MFM (disambiguation). Modified Frequency Modulation, commonly MFM, is a line coding scheme used to encode the actual data bits on most floppy disk formats,… …   Wikipedia

  • Hard disk drive — Hard drive redirects here. For other uses, see Hard drive (disambiguation). Hard disk drive Mechanical interior of a modern hard disk drive Date invented 24 December 1954 [1] …   Wikipedia

  • SyQuest Technology — SyQuest Technology, Inc., now known as SYQT, Inc., was an early entrant into the removable hard disk market for personal computers. The company was started in 1982 by Syed Iftikar; it was named partially after himself because of a company meeting …   Wikipedia

  • Disc Filing System — DFS Developer Acorn Computers Full name Disc Filing System Introduced 1982 (Acorn MOS) Partition identifier None Structures Directory contents Single catalogue of 31 fi …   Wikipedia

  • History of the floppy disk — 8 inch, 5¼ inch, and 3½ inch floppy disks Over the history of the floppy disk a number of different formats were used. Floppy disks have now been largely superseded by other storage media and by network file transfer. Contents …   Wikipedia

  • Group code recording — In computer science, group code recording (GCR) refers to several distinct but related encoding methods for magnetic media. The first, used in 6250 cpi magnetic tape, is an error correcting code combined with a run length limited encoding scheme …   Wikipedia

  • Commodore 1571 — The Commodore 1571 disk drive The Commodore 1571 was Commodore s high end 5¼ floppy disk drive. With its double sided drive mechanism, it had the ability to utilize double sided, double density (DS/DD) floppy disks natively. This was in contrast… …   Wikipedia

  • Commodore 1581 — The Commodore 1581 is a 3½ inch double sided double density floppy disk drive made by Commodore Business Machines (CBM) primarily for its C64 and C128 home/personal computers. The drive stores 800 kilobytes using an MFM enco …   Wikipedia

  • Amiga Original chipset — The Original Chip Set (OCS) was a chipset used in the earliest Commodore Amiga computers and defined the Amiga s graphics and sound capabilities. It was succeeded by the slightly improved Enhanced Chip Set (ECS) and greatly improved Advanced… …   Wikipedia

  • Amiga Old File System — OFS redirects here. For the former Dutch African colony, see Orange Free State. On the Amiga, the Old File System was the filesystem for Amiga OS before the Amiga Fast File System. Even though it used 512 byte blocks, it reserved the first small… …   Wikipedia

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