| 摘要 |
PROBLEM TO BE SOLVED: To provide SAS (Serial Attached Small Computer System Interface) paired subtractive routing that combines multiple SAS expanders to provide single SAS expander functionality. SOLUTION: An input port is assigned to an SAS expander device. An output port is assigned to the SAS expander device. The output port and the input port are defined to be paired with each other as a primary subtractive port. Only an SAS initiator address is programmed in the route table of the SAS expander. An OPEN command is sent from the output port upon receiving the OPEN command into the input port if the destination of the OPEN command is not a direct attached device of the SAS expander device and the destination is not in the route table of the SAS expander device. An OPEN command is sent from the input port upon receiving the OPEN command into the output port if the destination of the OPEN command is not a direct attached device of the SAS expander device and the destination is not in the route table of the SAS expander device. COPYRIGHT: (C)2010,JPO&INPIT |
