| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the size of data acquired as backup. <P>SOLUTION: A first storage system comprises a first logical volume, and a first controller that has a first memory. A second storage system comprises a second physical storage device that constitutes the basis of a second logical volume and a journal area, and a second controller that has a second memory. At least the first memory stores a write unit size, which is the size of a write data element. The journal area is a storage area storing a journal data element, which is a data element that is stored in any block of a plurality of blocks configuring the first and/or second logical volume, or a data element that is written to the block. The size of the journal data element, and the size of the respective blocks that are managed as the respective components of the first and second logical volumes are the write unit size. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
