code (Modified Frequency Modulation code) A method of encoding analog signals into magnetic bits or optical pits. MFM uses a fixed length encoding scheme that eliminates the need for space-consuming timing information used in FM. Bits are evenly spaced in time on the disk surface. This type of encoding scheme allows even single bit errors to be detected and corrected by the controller electronics. MFM was eventually replaced by the RLL method in hard drives, but it is still used in floppy drives.
Stands for modified frequency modulation, an encoding method used to store data in hard disks.
MFM hard disk drive interface
Loosely speaking, An old disk format sometimes used by CP/M, MS-DOS, and MS-Windows. No longer too common as it cannot deliver close to the performance of either SCSI or IDE.
Modified Frequency Modulation MFM is a physical method of storing data on a hard drive. This interface was the original IBM PC standard, but is not compatible with most systems manufactured more recently.
Abbreviation of modified frequency modulation, an encoding scheme used by PC floppy disk drives and older hard drives.
Modified Frequency Modulation: the data storage system used by floppy disk drives and older early hard disk drives. Had twice the capacity of the earlier FM method but was slower than the competing RLL scheme.
A long out-of-date hard disk format, requiring a special controller card.
Modified Frequency Modulation. Recording code used on floppy-interface QIC drives. It is the most efficient self-clocking code, but requires "good" electronics to decode.
Storage products. Modified Frequency Modulation : Old recording method for storage products with a maximum of 17 sectors per track.