Teledyne LeCroy SAS Suite User Manual - Manual (Page 147)

SASSuite User Manual Version 6.25
LeCroy Corporation
137
ATA Application Layer
When you click the ATA button, ATA Application Layer traffic is decoded and presented.
You can "open" any of these decode levels to reveal the components by clicking the small
triangle in the first cell. The following is an example of an expanded Management Level
view showing its constituent Transport Layer Transactions and Frames:
You can also get additional information on fields by holding your mouse over selected
fields as shown in the following example:
OOB (Out of Band) Signaling View
The OOB view combines OOB scenarios (establishing link, speed negotiation, etc.) into
a simplified and integrated view. These scenarios typically occur at power on and after
hardware resets as devices initialize and initiate communications.
The trace view below shows the default trace display as a SAS target and SAS host
attempt to initiate communication. The SAS target powers on first, and starts sending
COMINIT repeatedly (in fact, in this example, over 1400 times). When the initiator
powers on it also sends COMINIT and then both devices immediately respond with
COMSAS to identify themselves as SAS devices. and then proceed to speed negotiation.