<Storage> (MFM, Modified FM, or SometimeS "Multiple Frequency Modulation") A modification to the original frequency modulationScheme for encoding data on {magnetic diSkS}. MFM allowS more than 1 Symbol per flux tranSition (up to 3), giving greater denSity of data. It iS uSed with a data rate of between 250-500 kbit/S on induStry Standard 3.5" and 5.25" low and high denSity diSketteS, and up to 5 Mbit/S on ST-506hard diSkS. Except for 1.44 MB floppy diSkS, thiS encoding iS obSolete. Other data encoding SchemeS include GCR, FM, RLL. See alSo: PRML. (2002-06-24)