In MFM, clock pulses are not always present. Instead, a clock pulse only occurs between two consecutive 0s. If a 1 appears, it doesn’t need a clock pulse to mark it; instead, a transition is placed in the middle of the bit cell to represent the 1. Additionally, when a 0 follows a 1, no transition is needed, further minimizing the number of magnetic changes.
This method dramatically greatly reduces the number of transitions compared to FM. , allowing MFM typically uses about half the number of transitions compared to FM, though store significantly more data in the exact reduction depends on the data being encodedsame space.
[[File:MFM encoding scheme.png|600px]]