Method and apparatus for diagnosing FC-AL system link

Details Method and apparatus for diagnosing FC-AL system link Method and apparatus for diagnosing FC-AL system link

2007-10-09

2007-10-09

Ho, Duc (Department: 2616)

Multiplex communications

Diagnostic testing

C370S217000, C370S242000

Reexamination Certificate

active

10167392

ABSTRACT:
Upon detection of a fault of a loop or any of disk apparatuses30, 40, and50, an FC-AL control unit15notifies an MPU11of contents of the fault. The MPU11records a fault history for each disk apparatus in a memory circuit12and also sets an order in which the disk apparatuses30, 40, and50are to be disconnected, based on the fault histories. If the link fault occurs, the disk apparatuses30, 40, and50are disconnected from the loop in thus set disconnecting order. If the link failure occurs on the port A side loop1, a disk adapter10supplies a port bypassing-related instruction to its counterpart disk adapter20to thereby control bypassing/bypassing releasing on the port A side through the port B side loop2.

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