| 摘要 |
<p>PURPOSE:To reduce under-run and to improve efficiency for transferring all the data by comparing average data transfer speed between a data buffer and a host with data transfer speed between the data buffer and a magnetic tape unit and lowering the magnetic tape traveling speed of the magnetic tape unit when the former is lower than latter. CONSTITUTION:A CPU 21 transfers the data stored in a buffer memory 23 through an interface 22 to the host. In this case, similar to the recording of the data to the magnetic tape, the CPU 21 changes the speed of a motor for traveling the magnetic tape so that the traveling speed of the magnetic tape can be the prescribed speed when the average data transfer speed from the host to the buffer memory 23 is lower than the data transfer speed from the buffer memory 23 to the magnetic tape unit. Thus, the traveling speed of the magnetic tape is changed so as to improve efficiency for transferring all the data.</p> |
