| 摘要 |
PROBLEM TO BE SOLVED: To ensure the execution of recording and reproducing of information signals, etc., with high quality and high reliability by performing efficient cleaning of a magnetic head. SOLUTION: The magnetic tape 1 formed with a cleaning part 6 formed by finishing the surface of a magnetic recording layer 4 to 20 to 40 nm in center line surface roughness Ra in continuation with a recording parts 5 for information signals, etc., is used. The head cleaning is performed by allowing the cleaning part 6 to slide and travel with respect to the magnetic head 2 and cleaning information is simultaneously recorded in the cleaning part 6 in the state that the degradation in the recording and reproducing characteristics of the information signals, etc., is detected in recording and reproducing operation. The cleaning information is detected and the next cleaning start time is regulated.
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