Teledyne LeCroy SAS Verification Test Descriptions User Manual

Page 46

The University of New Hampshire

InterOperability Laboratory

Serial Attached SCSI Consortium

SAS Link and Transport Layer Test Suite v0.13

Test 9.4.4 - SSP XFER_RDY IU – WRITE DATA LENGTH

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 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 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_BUFFER command for 2051 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 if the DUT sets the WRITE DATA LENGTH field not a value that is not divisible
by four, that this is the last XFER_RDY frame for a command.