Patent ID: 7676707

Claim:
A device for testing SAS channels, applicable for a plurality of pairs of SAS interfaces included in an SAS back plate to detect whether the selected pair of SAS channels runs normally when transmitting data, comprising: a control terminal, for selecting SAS channels and sending a control command; a PCI-E microprocessor, electrically connected to the control terminal and a PCI-E channel, for receiving the control command from the control terminal and sending a test signal to the PCI-E channel according to the control command; a PCI-E-to-SAS adaptor, electrically connected to the PCI-E channel and the SAS back plate, for converting a transmission signal between the PCI-E channel and the SAS channels; and a signal feedback module, electrically connected to the SAS back plate, such that a first SAS interface, a second SAS interface in the SAS back plate are electrically connected to the signal feedback module, the first SAS interface outputs the received test signal to the second SAS interface, and the second SAS interface sends the received test signal back to the PCI-E microprocessor.