| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a virtual tape device to reduce power consumption by utilizing a disk array device conforming to MAID. <P>SOLUTION: Two or more disk devices are divided into an information managing disk group with power always kept and to two or more recording disk groups with power turned on/off as necessary when managing data. The virtual tape device includes: a volume information managing part which manages positions of virtual tapes allotted to storage areas of the recording disk groups; and a data managing part which rearranges, in the recording disk group whose power is on, the virtual tape for storing the data to the recording disk group whose power is off based on writing or reading information stored in the information managing disk group and positional information of the virtual tapes, and executes control to write backup data to the recording disk group whose power is on. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
