Patent ID: 6496951
Filing Date: 2002-12-17
Classification: G11C

Abstract:
A method for testing a data storage system, such system having a host computer coupled to a bank of disk drives through a system interface, such interface comprising a plurality of directors and a memory interconnected by a plurality of busses for controlling data transfer between the host computer and the bank of disk drives as such data passes through the memories, such directors and memory being plugged into a system printed circuit board, a portion of the directors being coupled to the host computer, such method comprising:providing a test printed circuit board having input ports adapted for plugging into the system printed circuit board, such test printed circuit board having a selector section adapted to couple any one of the inputs thereof to a test output on the test printed circuit board; a. prior to a test mode, removing one of the directors or memory from the system printed circuit board and replacing such removed one of the directors or memory with the test printed circuit board; b. operating the system with the test printed circuit board; c. selectively coupling the inputs of the test printed circuit board to the test output to examine a signal waveform produced at the test output; and d. Repeating steps (a-c).