SFF-8449, SFF-8636 Conference Call Minutes, October 22, 2009

Olawsky, Barry Barry.Olawsky at hp.com
Mon Nov 2 15:39:28 PST 2009

* From the T10 Reflector (t10 at t10.org), posted by:
* "Olawsky, Barry" <Barry.Olawsky at hp.com>
Minutes of SFF-8636, SFF-8449 conference call October 22, 2009
Mr. Min-Jie Chong		Agilent Technologies
Mr. Greg McSorley		Amphenol
Mr. Jim McGrath 	Cinch
Mr. Mickey Felton		EMC
Mr. Elwood Parsons	Foxconn Electronics		    
Mr. Barry Olawsky		Hewlett Packard
Mr. Harvey Newman		LSI Corp.
Mr. Tom Palkert 	Luxtera
Mr. Michael Rost		Molex Inc.
Mr. Galen Fromm 	Molex Inc.
Mr. Richard Haats		National Semiconductor
Mr. Bob Clark		NetApp	    
Mr. Tim Simons		PMC-Sierra
Mr. Alvin Cox		Seagate Technology	
Mr. Dan Smith		Seagate Technology	
Mr. Joel Meyers 	Tyco Electronics
Mr. Scott Shuey 	Tyco Electronics		     
Mr. Atul Sharma 	Volex, Inc.
Mr. Toney Chew		Volex, Inc.
Mr. Michael Koffman	Western Digital Technology
20 in attendance
Discuss proposed content for SFF-8636 (Common Management Interface) and
SFF-8449 (Mini Multilane Series Management Interface). SFF-8436 (QSFP+ Copper
and Optical Transceiver) is to be used as a basis for SFF-8636.
The discussion began with Barry Olawsky (HP) showing an SFF-8636 draft of
everything excluding the memory map sections. Mickey Felton (EMC) suggested
adding historical information to explain how the memory map has been
documented in the past for other connector implementations and how SFF-8636
together with referencing documents (for example, SFF-8449) provides a
complete design specification.
Barry noted that the current draft does not include a diagram showing the
end-to-end link with the management interface scope limited to each end of
the cable.
After the draft review was complete, the memory map limitations were
discussed. Barry stated that he had reviewed the memory map and concluded
that no room for passive cable parameters was available. Such parameters are
to be stored in locations 128 to 255. A suggestion was made to reassign a
portion of the vender specific region to new passive cable parameters. Harvey
Newman (LSI) expressed concern that some venders would have likely used those
locations already. One participant commented that they had done so. Tom
Palkert (Luxtera) recommended using the actual length of the cable to
estimate propagation delay. Alvin suggested we contact Tim Symons (PMC, no
longer on the call at that point) to fully understand the cable propagation
issue and how precise the delay numbers need to be. Barry indicated that he
would document the delay calculations and share his results with the group.
The meeting adjourned at 12 noon CDT.
Call schedule:
Upcoming conference calls: November 5, 2009
Toll Free Dial in Number: (877)810-9442 International Access/Caller Paid Dial
In Number: (636)651-3190 PARTICIPANT CODE: 3243413 
Webex information: 
Topic: SAS-2.1 PHY WG
Date: Thursday, November 5 2009
Time: 10:00 am, Central Daylight Time (GMT -05:00, Chicago) Meeting Number:
826 515 680 Meeting Password: newsas
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