Teledyne LeCroy SAS Verification Test Descriptions User Manual

Page 45

The University of New Hampshire

InterOperability Laboratory

Serial Attached SCSI Consortium

SAS Link and Transport Layer Test Suite v0.13

Test 9.4.3 - SSP XFER_RDY IU – MAXIMUM BURST SIZE

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 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,

and SCSI response frame to the received command.

Observable Results: Verify that the DUT sets the WRITE DATA LENGTH field to a value less than or equal to
the value in the MAXIMUM BURST SZE field in the Disconnect Reconnect Mode Page. If the DUT sets
MAXIMUM BURST SIZE to Zero, this would indicate that it can accept any WRITE DATA LENGTH, and this
item is not testable.