what is the significance of track,frame and interrecord gap in magnetic tape?
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A magnetic tape is a continuous plastic strip wound onto a reel, quite similar to the tape used in reel-to-reel audio recorders. The magnetic tape's plastic base is treated with an iron oxide coating that can be magnetized. Typically, the tape is one-half inch in width. It is wound in lengths from 400 to 3,200 feet. Some magnetic tapes are also packaged in plastic cartridges and cassettes for use with personal computers. Data is stored on magnetic tape by magnetizing small spots of the iron oxide coating on the tape. Although these spots can be read (detected) by the computer, they are invisible to the human eye. Large volumes of information can be stored on a single tape; densities of 1,600 characters per inch are common, and some tapes can store up to 6,250 characters per inch.
The most common method of representing data on magnetic tape uses a nine-track coding scheme, although other coding schemes are also used. When the nine-track method is used, the tape is divided into nine horizontal rows called tracks