| 摘要 |
<p>PURPOSE:To obtain the backup data of a desired day of the week by specifying a storing place by a host computer. CONSTITUTION:The data of the operated result of the host computer is stored and backed up on a magnetic tape cassette corresponding to respective day of the week from Sunday to Saturday. At least one excessive storing place than recording media at every day of the week is provided in a magazine for taking out and reproducing the magnetic tape cassette of the corresponding day of the week reproducing damaged data when the magnetic disk provided in the host computer essentially is damaged. Respective storing places are corresponded to respective day of the week from Sunday to Saturday individually and the storing place of the magnetic tape cassette is revised and exchanged by using the excessive empty storing place when the data of different day of the week from the day of the week corresponding to the storing place is stored in the recording medium taken out from respective storing places.</p> |
