| 摘要 |
PURPOSE:To prevent waiting time of a controller and to improve the processing efficiency by allowing a controller to receive a detection signal of an index signal from a magnetic device to bring the mode to the data transfer mode with the magnetic tape device. CONSTITUTION:In a data recording mechanism (DRD)26, an index information detecting section 48 to detect index information added to the head of a unit data is provided and when the index information is detected, it is used as a positioning end signal and transmitted by a primary controller (DIR)20 via a DRD interface circuit 38. After a positioning signal detecting section 36 detects the said positioning end signal, the DIR20 is brought into the data transfer wait state. If no data transfer request signal is transmitted from an interface 38 within a prescribed time, the data transfer waiting state of the DIR20 is released and the other processing, e.g., the intermitted control of access control ARC18 is executed.
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