Teledyne LeCroy SAS Verification Test Descriptions User Manual
Page 39
The University of New Hampshire
InterOperability Laboratory
Serial Attached SCSI Consortium
38
SAS Link and Transport Layer Test Suite v0.13
Test 9.2.2 - SSP Command IU – TARGET PORT TRANSFER TAG
Purpose: To determine that the DUT properly sets the TARGET PORT TRANSFER TAG field.
References:
9.2.1 SAS Standard
Resource Requirements: SAS Protocol Analyzer and Generator. SAS Target with 2 LUNs within the same SSP
Target Port. If the DUT is an initiator, it will need to have software capable of generating SCSI traffic.
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 Targets):
• 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 an initiator.
• The Testing Station should open an SSP connection to the DUT. The Testing Station should transmit a
WRITE BUFFER command to the DUT.
• Wait for the DUT to open an SSP connection to the Testing Station. Allow the DUT to transmit
XFER_RDY, then the Testing Station should transmit a SSP DATA frame. Allow the DUT to transmit
a SCSI Response to the Testing Station.
• The Testing Station should open a second SSP connection to the DUT. The Testing Station should
transmit a WRITE BUFFER command to the DUT do a different LUN than the first WRITE_BUFFER
command .
• Wait for the DUT to open an SSP connection to the Testing Station. Allow the DUT to transmit
XFER_RDY, then the Testing Station should transmit a SSP DATA frame. Allow the DUT to transmit
a SCSI Response to the Testing Station.
Observable Results: SSP Targets have the option of setting the TARGET PORT TRANSFER TAG field to any
value when transmitting a frame. In an XFER_RDY frame the Target Port Transfer Tag should be unique for the
L_Q portion of the I_T_L_Q nexus.