Patent ID: 6542954
Filing Date: 2003-04-01
Classification: G06F

Abstract:
A disk subsystem, comprising:a disk array controller, wherein said disk array controller comprises: a host interface controller for controlling data input/output from a host computer, a cache memory for temporarily storing data received in said host interface controller, a parity data generator for adding parity data to said data, and disk drive unit interfaces for storing said data into a plurality of disk drive units for storing said data and said parity data; fabric switches provided between said disk array controller and said disk drive units, wherein each fabric switch comprises: first protocol controllers connected to said disk drive unit interfaces for detecting an ID number of a loop protocol of one of said disk drive units to be accessed, second protocol controllers connected to said disk drive units for allocating an ID number of a fabric protocol to one of said disk drive units, and a switch controller provided between said first protocol controllers and said second protocol controllers for storing both ID numbers of each of said disk drive units to store correspondence of said both ID numbers.