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SAS -1, Speed Negotiation Decodes
TraceView uses timing values and other criterion to determine events reported for speed
negotiation using OOB signals. The description of how TraceView determines these events are
shown in Table 18.
Table 18: Speed Negotiation Decodes
Speed Negotiation Decodes
Successful G1 speed Neg
Unsuccessful G1 speed Neg
Successful G2 speed Neg
Unsuccessful G2 speed Neg
Successful G3 speed Neg
Unsuccessful G3 speed Neg
Good RCDT detected
Bad RCDT detected
Good SNTT detected
Bad SNTT detected
1.5 Gbps speed detected
3.0 Gbps speed detected
6.0 Gbps speed detected
Speed Neg. Failed
Xgig Analyzer User's Guide
Chapter 13, Configuring Xgig TraceView
Event Description
This event is set when a SAS device sends and receives ALIGN(1)
primitives during G1 window of the SAS speed negotiation sequence.
This event is set when a SAS device does not send or receive
ALIGN(1) primitives during G1 window of the speed negotiation
sequence.
This event is set when a SAS device sends and receives ALIGN(1)
primitives during G2 window of the speed negotiation sequence.
This event is set when a SAS device does not send or receive
ALIGN(1) primitives during G2 window of the speed negotiation
sequence.
This event is set when a SAS device sends and receives ALIGN(1)
primitives during G3 window of the speed negotiation sequence.
This event is set when a SAS device does not send or receive
ALIGN(1) primitives during G3 window of the speed negotiation
sequence.
A SAS device shall send D.C Idle for 750000 OOBI (nominal value =
500 us) during the RCDT phase of a SAS speed negotiation window
time. This event is set when the measured RCDT value lies within this
range: 492.5 us < RCDT < 507.5 us.
A SAS device shall send D.C Idle for 750000 OOBI (nominal value =
500 us) during the RCDT phase of a speed negotiation window time.
This event is set when the measured RCDT time <= 492.5 us or
RCDT time >= 507.5 us.
A SAS device shall send ALIGN(0) or ALIGN(1) for 163840 OOBI
(nominal value = 109.2 us) during the SNTT phase of a SAS speed
negotiation window time. This event is set when the measured SNTT
time lies within this range: 102.5 us < SNTT < 117.5 us
A SAS device shall send ALIGN(0) or ALIGN(1) for 163840 OOBI
(nominal value = 109.2 us) during the SNTT phase of a SAS speed
negotiation window time. This event is set when the measured SNTT
time <= 102.5 us or SNTT time >= 117.5 us.
This event is set during SATA speed negotiation sequence, if a SATA
device sends and receives ALIGN(0) primitives at 1.5 Gbps rate.
This event is set during SATA speed negotiation sequence, if a SATA
device sends and receives ALIGN(0) primitives at 3.0 Gbps rate.
This event is set during SATA speed negotiation sequence, if a SATA
device sends and receives ALIGN(0) primitives at 6.0 Gbps rate. This
event applies only to the 6G SAS/SATA blade.
This event is set when the SAS speed negotiation sequence or the
SATA speed negotiation sequence fails between two devices trying to
communicate using the SAS/SATA protocol.
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