Error in SPL-r04 MT_IP (transport Layer for SMP initiator port) State Machine?

Alan Westbury Alan_Westbury at xyratex.com
Sat Nov 14 03:45:42 PST 2009


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Hi T10,
SPL Figure 146 shows message "SMP Frame Receive Timeout" in state
MT_IP3:Receive.
This message is not covered by the clause describing this state
(8.4.5.2.4.1).
Looking back at SAS 1.1, there used to be a vendor specific "SMP Frame
Receive Timeout timer".  On expiry of this timer, MT_IP informed the
management application, and sent a Break request to the Port Layer.
This would appear to account for the message shown in Fig 146.
In SAS 2 / SPL the timing requirement has shifted to the MT_TP state
machine, but it's now unclear what the MT_IP response should be in the
event of a timeout.
Regards,
Alan
---
Alan Westbury
Product Architect
Xyratex
Storage Systems, 
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Email: alan_westbury at xyratex.com <mailto:alan_westbury at xyratex.com> 
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