Patent ID: 7992048
Filing Date: 2011-08-02
Classification: G06F

Abstract:
1. A computer system, comprising: at least one first host computer having a processor, a memory, and an interface; and at least one storage system connected to the first host computer, wherein the storage system has a disk drive for storing data that is requested to be written by the first host computer and a disk controller for controlling the disk drive, and provides a storage area of the disk drive as at least one logical unit to the first host computer, wherein upon detecting a failure in a logical path serving as an access route from the first host computer to the logical unit, the first host computer specifies logical paths for accessing the logical unit, wherein the first host computer executes failure detecting processing for the specified logical paths to judge whether the specified logical paths are normal or not, wherein the first host computer selects normal logical paths out of the specified logical paths, wherein the first host computer accesses the logical unit via the selected normal logical paths, wherein the first host computer stores logical path connection information, which indicates association between the logical path and components passed by the logical path, wherein the first host computer blocks the logical path where a failure is detected and a logical path that is judged as abnormal through the failure detecting processing, wherein the first host computer estimates, as a cause of the failure, a component passed by only the blocked logical paths by referring to the logical path connection information, the computer system further comprising a management server connected to the first host computer, wherein the first host computer notifies the management server of the estimated cause of the failure, wherein the management server notifies the estimated cause of the failure, which is notified by the first host computer, to a second host computer, which is not the first host computer, wherein the second host computer specifies the logical paths that pass the notified cause of the failure, wherein the second host computer executes failure detecting processing for the specified logical paths to judge whether the specified logical paths are normal or not, wherein the disk controller has at least one channel adapter connected to the first host computer, wherein the first host computer has at least one host bus adapter connected to the storage system, and wherein the first host computer estimates the host bus adapter, the channel adapter, or the logical unit as a cause of a failure.