| 摘要 |
PROBLEM TO BE SOLVED: To positively utilize the load distribution function of an I/O path. SOLUTION: A reserve instruction permits access from only one path to logical disks 13 to 15. Therefore, when one path is reserved according to the reserve instruction, access from another path to the logical disks 13 to 15 is not permitted, and load distributing functions by a plurality of paths are not sufficiently exhibited. A path redundant driver 4 does not transmit any reserve instruction to a disk array sub-system 10 as it is but transmits the reserve instruction to the disk array sub-system 10 by replacing it with an instruction to permit access from another path. Thus, it is possible to make access from a plurality of paths to the logical disks, and to sufficiently exhibit the load distributing functions by a plurality of paths. COPYRIGHT: (C)2007,JPO&INPIT
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