| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To store a journal at a low cost in back up and recovery of data. <P>SOLUTION: One or more random access storage devices comprise a volume group and a journal volume. The volume group contains a volume pair configured of a primary volume and a secondary volume. Whenever data is received from a host device, this received data is written in the primary volume, a journal containing the data write order and the data is created, and the journal is written in a journal volume. A plurality of journals accumulated in a journal volume are written in a sequential access storage device. Based on the write order recorded in each of the plurality of journals recorded in the sequential access storage device, the data of the journals is restored to the primary volume for storing the data and to a secondary volume configuring the volume pair. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
