- A scheme of encoding disk data in which there will always be at least one but no more than three silence between pulses, and it lets you pack the bits twiceas closely together. It is called doubledensity when MFM floppy disks first came out.; 對(duì)寫(xiě)到盤(pán)上的數(shù)據(jù)進(jìn)行編碼的一種方案,編碼后的數(shù)據(jù)在兩個(gè)“1”之間最少有一個(gè) “0”,但最多不超過(guò)3個(gè)“0”。這樣就可以使每個(gè)數(shù)據(jù)位在磁道上占的長(zhǎng)度減少一倍。 因此當(dāng)MFM軟磁盤(pán)一出現(xiàn)時(shí),也叫做倍密度磁盤(pán)。
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