Teledyne LeCroy SAS Sample Test Suite - Manual (Page 21)

SAS Sample Test Suite
Error Conditions – Frames Sent to Initiator (Test Group B) 21
Errors on RESPONSE frames (TestB.5 & TestB.6)
NAK response from Initiator (TestB.5)
Target device shall resend the frame one time with the Retransmit bit = 1 and all other fields the
same as in the first transmission of the frame. (I.e., can’t disable retries for a response frame).
The retransmitted Response frame may be sent in the same or in a new connection.
Test Procedure:
1. The Testing Station is instructed to start and complete a phy Reset sequence
followed by an Identify sequence with the DUT. Since the DUT is a target, the Testing
Station is instructed to transmit an Identify Address frame indicating that it is a SAS
Initiator.
2. The Testing Station is instructed to open an SSP connection to the DUT and transmit
a SCSI WRITE command for 1024 bytes. Close the connection
3. Allow the DUT to open an SSP connection to the Testing Station and transmit
XFER_RDY.
4. The Testing Station is instructed to open a connection to the DUT and transmit 1024
byte data frame. Close the connection.
5. Allow the DUT to open an SSP connection and transmit a SCSI RESPONSE frame to
the received command and data. The Testing Station is instructed to transmit NAK to
the RESPONSE frame. Second part of test will instruct Testing Station to send no ACK
response and wait for DONE ACK/NAK TIMEOUT
Observable Results: Verify that the DUT transmits the Response frame again. It should be on a new
connection request but not required.