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Filter And Hide Chapter 13, Configuring Xgig TraceView
Xgig Analyzer User’s Guide 263
If you set the option to
Show Advanced OOB Events
, additional OOB events such as speed
negotiation events are displayed. The display/hide of events works by toggling the button. Only
when you select the button will the OOB events display. When you deselect the button, no OOB
events will display. For OOB Begin/End markers to display, you also need to set TraceView to
display these events in the
Expert/Protocol Decodes
tab of TraceView options. Select the
Show
OOB Begin/End Markers check box in the dialog box to show these events.
OOB Signal Detection and Interpretation
TraceView uses timing measurements to determine whether the OOB signal detected is good or
bad. Figure 117 shows a diagram of OOB bursts and D.C. Idles between OOB bursts. Based on the
time lengths (see Table 15) of the first through fourth D.C. Idle, TraceView will categorize the
event as good or bad. This evaluation is different for each type of event – COMINIT,
COMRESET, COMSAS, or COMWAKE.
Figure 117: OOB Event Detection Diagram
OOB Event Detection and Speed Negotiation is unique to each version of the SAS protocol,
SAS-1 or SAS-2. The tables below describe the OOB events for each version.
Table 15: Minimum and Maximum Values for Good OOB Signals
OOB Signal Rx D.C. Idle Time Minimum Rx D.C. Idle Time Maximum
COMINIT 255 ns 465 ns
COMSAS 700 ns 1525 ns
COMWAKE/COMRESET 70 ns 160 ns
Table 16: SATA Port Selection Timing
SATA Port Selection Timing Minimum Maximum
SATA Port Selection T1 Time 1.6 ms 2.4 ms
SATA Port Selection T2 Time 7.6 ms 8.4 ms