| 摘要 |
A path selecting unit searches, upon receiving an enquiry of a path to an input/output device from a central processing unit, a storing unit that stores therein device identification information and path identification information by using device identification information included in the enquiry as a key, retrieves path identification information of an enquired path, and returns retrieved path identification information to the central processing unit in response to the enquiry. When one of the paths becomes unavailable, an updating unit updates the storing unit such that an unavailable path is not selected by the path selecting unit.
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