SAS Expander: ECM Confirmation Arbitrating (Normal)
gil.romo at qlogic.com
Mon Apr 26 11:23:09 PDT 2004
* From the T10 Reflector (t10 at t10.org), posted by:
* Gil Romo <gil.romo at qlogic.com>
Subclause 4.6.3 lists the main functions of the ECM. Obviously, this list also
defines sequence of operations.
The generation of ECM confirmations and expander primitives depends on this
For example, if an expander must reject an OPEN Address Frame, shall it send Arb
Reject (...) and never send Arbitrating (Normal)? It doesn't make sense for an
invalid OPEN Address frame to participate in arbitration.
However, Table 11 states an Arbitrating (Normal) confirmation is sent when "the
ECM has received the Request Path request".
Note here the description of AIP (NORMAL), "Expander device has accepted the
connection request... ".
Perhaps a better wording for the description of Arbitrating (Normal) is, "the
ECM has begun path arbitration including the Request Path request".
Circuits & Integration
QLogic Corporation, Aliso Viejo, California
E-mail: gil.romo at qlogic.com
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