Teledyne LeCroy SAS Verification Test Descriptions - Manual (Page 43)

The University of New Hampshire
InterOperability Laboratory
Serial Attached SCSI Consortium
42 SAS Link and Transport Layer Test Suite v0.13
Test 9.4.1 - SSP XFER_RDY IU – REQUESTED OFFSET
Purpose: To determine that the DUT, an SSP Target port, properly sets the DATA OFFSET field when transmitting
DATA frames.
References:
9.2.2.3, 10.2.6.1.5 SAS Standard
Resource Requirements: SAS Protocol Analyzer and Generator.
Revision History: February 7, 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 MODE SENSE
command for the Disconnect-Reconnect Mode Page. Close the connection
• Allow the DUT to open an SSP connection to the Testing Station and transmit DATA frame with the
Mode Page Block Descriptor and a SCSI response frame to the received MODE SENSE command.
• The Testing Station should open an SSP connection to the DUT and transmit a SCSI WRITE
command for 2048 bytes. Close the connection
• Allow the DUT to open an SSP connection to the Testing Station and transmit XFER_RDY, DATA,
SCSI response frame to the received command.
Observable Results: Verify that the DUT sets the REQUESTED OFFSET field to zero in the first XFER_RDY
frame unless the First Burst Size field in the Disconnect Reconnect Mode Page is not zero. If the First Burst Size
field in the Disconnect Reconnect Mode Page is not zero then the REQUESTED OFFSET field should be set to 512
times the value in the First Burst Size field.