SAS-03rf, Expander Link Layer (XL)
Elliott, Robert (Server Storage)
Elliott at hp.com
Mon Apr 14 14:11:50 PDT 2003
* From the T10 Reflector (t10 at t10.org), posted by:
* "Elliott, Robert (Server Storage)" <Elliott at hp.com>
Rob Elliott, elliott at hp.com
Hewlett-Packard Industry Standard Server Storage Advanced Technology
> -----Original Message-----
> From: Gil Romo [mailto:gil.romo at qlogic.com]
> Sent: Friday, April 11, 2003 3:48 PM
> To: t10 at t10.org
> Cc: gil.romo at qlogic.com
> Subject: SAS-03rf, Expander Link Layer (XL)
> * From the T10 Reflector (t10 at t10.org), posted by:
> * Gil Romo <gil.romo at qlogic.com>
> May I participate in comments?
> In the third lettered list (messages from the XL receiver) of
> Subclause 7.15.2
> XL transmitter and receiver, I believe the following messages
> are missing:
> - OPEN_ACCEPT Received, and
> - OPEN_REJECT Received.
Added to the next revision.
> Items (c) and (d) of the first lettered list of 18.104.22.168
> State description,
> define the conditions that generate Backoff Retry and Backoff
> Reverse Path
> responses, respectively. Does the XL6:Open_Response_Wait
> state manage these
> arbitration issues or is it done by the expander connection manager?
The XL state machine manages both "OPENs crossing on the wire" and
an inbound OPEN arriving after an AIP.
XL only reaches XL6 when it has sent an outbound OPEN. If an inbound
OPEN arrives and they cross on the wire, 7.12.3 has the rules for
picking the winner. If an inbound OPEN arrives after an AIP arrives,
then it should always win.
However, 7.12.3 doesn't include the latter rule; 22.214.171.124 does. In
the SL_CC state machine (126.96.36.199.3 SL_CC1 to SL_CC2) this behavior
In the XL's 188.8.131.52, c) and d) probably need to mention it as well.
> Gilbert Romo
> QLogic Corp
> (949) 389 - 6266
> Gil.Romo at QLogic.com
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