Storage system and communications path control method for storage system
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United States of America Patent
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Nov 11, 2008
Grant Date -
Apr 6, 2006
app pub date -
Nov 23, 2004
filing date -
Oct 6, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A method for controlling communications paths in a storage system provided between a storage device and a plurality of host devices. The method includes: respectively monitoring communications statuses between each of the host devices and the storage device; detecting whether a prescribed temporary failure, which can be corrected without switching communications paths, has occurred, based upon the detected communications statuses; a switching instruction step of not outputting a switching request signal for requesting switching from a failed communications path to a to-be-used communications path, before a number of occurrence of the prescribed temporary failure thus detected reaches a threshold value which is equal to or larger than 2, and outputting the switching request signal only when the number of occurrence of the prescribed temporary failure reaches the threshold value; and selecting the to-be-used communications path, from among the plurality of communications paths, on the basis of the switching request signal.
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