Teledyne LeCroy SAS Verification Test Descriptions User 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.