| 摘要 |
A magnetic tape system includes a driving unit with a magnetic head, reels for winding a magnetic tape, a drive portion for the reels and a drive control unit. A prefetch control unit commands from the host controller and another memory temporarily stores data from the host controller or data read out from the magnetic tape. The prefetch control unit counts the number of blocks of write data of the write commands, the counted block number is set as the renewed maxmum block length and prefetch control. The write data is executed based on the renewed maxmum block length.
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