Teledyne LeCroy SAS Verification Test Descriptions - Manual (Page 23)

The University of New Hampshire
InterOperability Laboratory
Serial Attached SCSI Consortium
22 SAS Link and Transport Layer Test Suite v0.13
Test 7.3.3 - SSP_Frames – Multiple ACKs
Purpose: To determine that the DUT properly transmits ACK within 1 msec of receiving a frame requiring an ACK
response.
References:
7.16.3, 7.16.5 SAS Standard
Resource Requirements: SAS Protocol Analyzer, SAS Initiator, SAS Target, Software capable of generating SCSI
traffic from the SAS Initiator. In order to minimize physical layer problems, the Initiator, Target, and Analyzer
should be connected with near-ideal channels.
Revision History: September 13, 2004
Test Setup: The SAS Initiator and Target are connected through the SAS Analyzer.
Test Procedure:
• Using the generation software, cause the SAS Initiator to begin a series of 1000 64 kB READ
operations on the SAS Target. Capture this on the SAS Analyzer.
Observable Results: If the DUT is an initiator, search the Analyzer capture of the target transmissions for the
DONE (ACK/NAK TIMEOUT) primitive. If the DUT is a target, search the Analyzer capture of the initiator
transmissions for the DONE (ACK/NAK TIMEOUT) primitive. If any of these primitives are found, it indicates that
the DUT did not transmit ACK within the 1 msec necessary after receiving frame requiring ACK or NAK.