| 摘要 |
PURPOSE:To attain write of a new data on a magnetic tape with a data recorded thereupon by low recording density in a magnetic tape device recording the data with high recording density by using a suitable magnetic head in accordance with purpose. CONSTITUTION:The title device consists of a 1st write head 5 writing a data onto a magnetic tape 4 at low recording density, a 2nd write head 6 writing a data to the magnetic tape 4 at high recording density, and a read head 7 reading the data written on the magnetic tape 4. The write head 5 records a data on the magnetic tape 4 at a low recording density and erases the old data of the magnetic tape 4 by AC degaussing in erasing the old data of the magnetic tape 4, and recording a data on the magnetic tape 4 at a high recording density, then it is possible for the write head 6 to write a new data on the magnetic tape 4 at a high recording density. Thus, the magnetic tape device writes a data on the magnetic tape 4 by either or the low recording density and the high recording density.
|
