Patent ID: 7490176
Filing Date: 2009-02-10
Classification: G06F

Abstract:
1. A serial attached SCSI (SAS) backplane detection system, for detecting whether a second SAS backplane is serially connecting to a first SAS backplane in a server, the first SAS backplane and the second SAS backplane respectively having a first pin, a second pin, and a third pin, wherein when the second SAS backplane is serially connected to the first SAS backplane, the first pin of the first SAS backplane is connected to the third pin of the second SAS backplane, the SAS detection system comprising: a first signal unit, disposed in the first SAS backplane for providing a logic signal with a first status value; a second signal unit, disposed in the second SAS backplane for providing a logic signal with a second status value; a first connecting unit, for electrically connecting the first pin and the second pin of the first SAS backplane, and the first signal unit; a second connecting unit, for electrically connecting the third pin of the second SAS backplane, and the second signal unit; and a master control unit, disposed in a system board of the server, and connected to the second pin of the first SAS backplane, wherein when the first SAS backplane is not serially connected to the second SAS backplane, the logic signal with the first status value provided by the first signal unit is input to the master control unit through the second pin of the first SAS backplane; when the first SAS backplane is serially connected to the second SAS backplane, the logic signal with the second status value provided by the second signal unit is input to the master control unit through the third pin of the second SAS backplane, the first pin and the second pin of the first SAS backplane; the master control unit determines whether the first SAS backplane is serially connected to the second SAS backplane according to the received first status value or second status value, so as to set system parameters of the server accordingly.