Draft minutes of SAS protocol teleconference - July 30, 2002

John Lohmeyer lohmeyer at t10.org
Tue Jul 30 11:15:00 PDT 2002


* From the T10 Reflector (t10 at t10.org), posted by:
* John Lohmeyer <lohmeyer at t10.org>
*
A PDF of these minutes is available at:

   ftp://ftp.t10.org/t10/document.02/02-299r0.pdf

Accredited Standards Committee*
InterNational Committee for Information Technology Standards (INCITS)

                                                       Doc. No.: T10/02-299r0
                                                           Date: July 30, 2002
                                                       Reply to: John Lohmeyer
To:      T10 Membership
From:    John Lohmeyer
Subject: SAS Protocol Teleconference -- July 30, 2002

Agenda
1.     Opening Remarks
2.     Approval of Agenda
3.     Attendance and Membership
4.     Old Business
4.1      SAS Working Draft Review [Elliott]
4.2      SAS Port Control State Diagram Update (02-202) [Worden]
4.3      SAS COMMAND ID Removal (02-259) [Day]
4.4      Initiator based discovery and configuration of the SAS topology,
proposal (02-279) [Fairchild]
4.5      Arbitration clarification (02-222) [Galloway]
4.6      SAS SSP target transport layer state machines (02-287) [Evans]
5.     New Business
5.1      2-bit proposal on LED driver [Lohmeyer]
5.2      SAS - OOB and DWS state machines update (02-300) [Grieff]
5.3      SAS Combined Request-Configuration List (02-276) [Worden]
5.4      Additional R-RDY primitives [Penokie]
5.5      Rate Change Delay in speed negotiation window [Grieff]
6.     Review of Recommendations to the Plenary
7.     Meeting Schedule
8.     Adjournment


Results of Meeting

1.     Opening Remarks

John Lohmeyer called the meeting to order at 9:00 a.m., Tuesday, July 30,
2002.

2.     Approval of Agenda

The draft agenda was approved with the following changes:

5.1      2-bit proposal on LED driver [Lohmeyer]
5.2      SAS - OOB and DWS state machines update (02-300) [Grieff]
5.3      SAS Combined Request-Configuration List (02-276) [Worden]
5.4      Additional R-RDY primitives [Penokie]
5.5      Rate Change Delay in speed negotiation window [Grieff]


The following items were added/revised during the course of the meeting:

none


3.     Attendance and Membership

Attendance at working group meetings does not count toward minimum attendance
requirements for T10 membership. Working group meetings are open to any person
or organization directly and materially affected by T10's scope of work. The
following people attended the meeting:

          Name          S        Organization         Electronic Mail Address
---------------------- -- ------------------------- -------------------------
Mr. Ron Roberts        P  Adaptec, Inc.             Ron_Roberts at adaptec.com
Mr. Bill Galloway      P  BREA Technologies, Inc.   billg at breatech.com
Mr. Lafe Moon          V  Data Transit Corp.        lafe at data-transit.com
Mr. Steven Fairchild   V  Hewlett Packard Co.       Steve.Fairchild at hp.com
Mr. Thomas Grieff      V  Hewlett Packard Co.       Thomas.Grieff at hp.com
Mr. Jim Reif           V  Hewlett Packard Co.       jim.reif at hp.com
Mr. Matt Otto          V  I-TECH Corp.              matt_otto at i-tech.com
Mr. Steven Wirtz       V  I-TECH Corp.              steve_wirtz at i-tech.com
Mr. George O. Penokie  P  IBM / Tivoli Systems      gop at us.ibm.com
Mr. Dan Colegrove      V  IBM Corp.                 dcolegro at us.ibm.com
Mr. John Lohmeyer      P  LSI Logic Corp.           lohmeyer at t10.org
Mr. Brian Day          V  LSI Logic Corp.           brian.day at lsil.com
Mr. Mark Evans         P  Maxtor Corp.              mark_evans at maxtor.com
Mr. David Cressman     V  Maxtor Corp.              dave_cressman at maxtor.com
Mr. Ting Li Chan       V  QLogic Corp.              ting.chan at qlogic.com
Mr. Arie Krantz        V  QLogic Corp.              l_krantz at qlc.com
Mr. Jim Coomes         V  Seagate Technology        jim_coomes at seagate.com
Mr. John Worden        V  Seagate Technology        john.worden at seagate.com

18 People Present

Status Key:  P    -  Principal
              A,A# -  Alternate
              AV   -  Advisory Member
              L    -  Liaison
              V    -  Visitor


4.     Old Business


4.1    SAS Working Draft Review [Elliott]

In the absence of Rob Elliott, this topic was deferred.

4.2    SAS Port Control State Diagram Update (02-202) [Worden]

John Worden reviewed the port control state diagram (02-202r1e). He made
changes based on the group's input and agreed to post rev 2.

4.3    SAS COMMAND ID Removal (02-259) [Day]

Brian Day asked that this item be deferred.

4.4    Initiator based discovery and configuration of the SAS topology,
proposal (02-279) [Fairchild]

Steve Fairchild presented 02-279r2, Initiator based discovery and
configuration of the SAS topology, proposal. George Penokie asked about the
architecture of the edge expander. Ron Roberts was concerned about changing
the SMP frame formats.

There are two issues: 1) changing the SMP frame formats to support a per PHY
structure; 2) adopting the concept of the edge router. Steve agreed to
separate his proposal to address each issue separately. For now, the group
agreed that the SMP fields associated with the edge router proposal would be
considered `ignored' in the SMP frame change proposal.

Steve reviewed the detailed changes in his proposal associated with the SMP
frame changes. He received input and agreed to revise his proposal, leaving
out configuration information specific to edge routers.

4.5    Arbitration clarification (02-222) [Galloway]

Bill Galloway asked that this item be deferred.

4.6    SAS SSP target transport layer state machines (02-287) [Evans]

Mark Evans asked that this item be deferred.


5.     New Business

5.1    2-bit proposal on LED driver [Lohmeyer]

John Lohmeyer reviewed the LED driver discussion from the 7/29/02 PHY
teleconference. The PHY group had proposed that the LED driver pin become a
programmable current sink with nominal values of 0, 5, 10 and 20 mA. Russ
Brown posted a reflector message on 2002/07/29 documenting the idea. The
protocol group suggested that only one value be supported of approximately 15
mA nominal. John Lohmeyer agreed to communicate this back to the PHY group.

5.2    SAS - OOB and DWS state machines update (02-300) [Grieff]

Tom Grieff presented 02-300r0, SAS - OOB and DWS state machines update. He
received input and agreed to revise his proposal.

5.3    SAS Combined Request-Configuration List (02-276) [Worden]

John Worden presented 02-276r1, SAS Combined Request-Configuration List. This
is the result of the discussion at the last face-to-face meeting.

5.4    Additional R-RDY primitives [Penokie]

George Penokie suggested that an additional flavor of R-RDY be defined that
gives the initiator permission to send data, but not commands. This might
avoid some QUEUE FULL situations. The target guys liked the idea, but the
initiator guys would not quite so enthusiastic. More discussion reveled that
task management functions probable should not be blocked. George agreed to
prepare a proposal.

Bill Galloway said that he plans to prepare a proposal to add some additional
flavors of primitives that today mean exactly the same thing as the base
primitive. In the future, we could add additional meaning to these flavors.

5.5    Rate Change Delay in speed negotiation window [Grieff]

Tom Grieff noted that he thought a change proposed from the PHY working group
in the RCD in the speed negotiation window was not completely thought out. He
suggested that the PHY group look again at the lockup time, which should be a
larger portion of the window. He agreed to participate on the next PHY
teleconference.


6.     Review of Recommendations to the Plenary

John Lohmeyer noted that the following recommendations have been made to the
T10 plenary:

none


7.     Meeting Schedule

SAS Protocol Working Group meetings are scheduled for:

Wednesday-Friday, August 21-23, 2002 commencing at 9:00 am on Wednesday and
ending at noon on Friday in Shrewsbury, MA at Maxtor. Host contact: Mark
Evans.

Monday-Tuesday, September 9-10, 2002 commencing at 1:00 p.m. on Monday and
ending at 5:00 p.m. on Tuesday in Minneapolis, MN at the Hilton
Minneapolis/St. Paul Airport Hotel (952-854-2100).

A SAS Protocol teleconference is scheduled for:

    Tuesday August 13, 2002
    11:00 am -- 2:00 pm  EDT
    10:00 am -- 1:00 pm  CDT
     9:00 am -- noon     MDT
     8:00 am -- 11:00 am PDT

    USA Toll Free Number: 877-417-9828
             Toll Number: +1-706-679-9028
         Conference Code: 719 533 7560

WebEx Session: http://seagate.webex.com/
  Meeting Name: SAS Protocol teleconference
      Password: to be announced on T10 reflector

John Lohmeyer suggested that we tentatively plan for an editing meeting
sometime during the week of October 14th (probably toward the end of the
week).

8.     Adjournment

The meeting was adjourned at 12:03 p.m. on Tuesday, July 30, 2002.


--
John Lohmeyer                  Email: lohmeyer at t10.org
LSI Logic Corp.                Voice: +1-719-533-7560
4420 ArrowsWest Dr.              Fax: +1-719-533-7183
Colo Spgs, CO 80907

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