Teledyne LeCroy SAS Verification Test Descriptions - Manual (Page 53)

The University of New Hampshire
InterOperability Laboratory
Serial Attached SCSI Consortium
52 SAS Link and Transport Layer Test Suite v0.13
Test 9.6.3 - SSP ERROR HANDLING – No ACK/NAK Received
Purpose: To determine that the DUT, an SSP Target port, responds properly when no acknowledgement is received
for a transmitted RESPONSE frame.
References:
9.2.5.1 SAS Standard
Resource Requirements: SAS Protocol Analyzer and Generator.
Revision History: February 8, 2005
Test Setup: The DUT and the Testing Station are physically connected. The DUT is not powered on .
Test Procedure (SSP Target):
• Power on the DUT.
• The Testing Station should start and complete a Phy Reset sequence followed by an Identify sequence
with the DUT. Since the DUT is a target the Testing Station should transmit an Identify Address frame
indicating that it is a SAS Initiator.
• The Testing Station should open an SSP connection to the DUT and transmit a SCSI WRITE
command for 1024 bytes. Close the connection
• Allow the DUT to open an SSP connection to the Testing Station and transmit XFER_RDY.
• The Testing Station should open a connection to the DUT and transmit 2 512 byte data frames. Close
the connection.
• Allow the DUT to open an SSP connection and transmit a SCSI RESPONSE frame to the received
command and data. The Testing Station should not transmit ACK or NAK to the RESPONSE frame.
Observable Results: Verify that if the DUT retransmits the RESPONSE frame with the RETRANSMIT bit set to 1.