Data transfer method and system, input/output request device, and computer-readable recording medium having data transfer program recorded thereon

摘要

A data transfer method for transferring, through use of a plurality of paths, data between a plurality of logic devices provided in an external storage device and an input/output request device which issues input/output requests to the respective logic devices of the external storage device. The method includes a first step for setting priority levels of the plurality of logic devices; a second step for setting usage rates of the paths for the respective logic devices on the basis of the priority levels set in the first step; and a third step for transferring the data through use of respective paths such that the usage rates set in the second step are achieved.