Draft Minutes - SCSI Parallel WG - April 29, 2002

John Lohmeyer lohmeyer at t10.org
Tue Apr 30 14:18:19 PDT 2002


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

   ftp://ftp.t10.org/t10/document.02/02-161r0.pdf

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

                                                      Doc. No.: T10/02-161r0
                                                          Date: April 30, 2002
                                                      Reply to: John Lohmeyer
To:       T10 Membership
From:     Ralph Weber & John Lohmeyer
Subject:  Parallel SCSI Working Group Meeting -- April 29, 2002
           Nashua, NH

Agenda
1.     Opening Remarks
2.     Approval of Agenda
3.     Attendance and Membership
4.     SPI-5 Topics
4.1      SPI-5 Testing [Manildi]
4.2      SPI-5 Status [Penokie]
4.3      Messages During Packetized [Bellamy]
4.4      Negotiation Issues [Galloway]
4.5      Ultra640 SCSI, Reduction of Crosstalk Errors During Timing Deskew
(02-163) [Brown & Aliahmad]
5.     Old Business
5.1      Project Proposal for SPI-6 (01-145) [Lohmeyer]
5.2      PIP Report [Ham]
6.     New Business
6.1      Inconsistent use of 'assertion and negation' in SPI-4 (02-114)
[Houlder]
6.2      Public Review Comment #1 on INCITS 362 (SPI-4) (02-129) [Houlder]
6.3      Link control message correction (02-150) [Galloway]
6.4      Negotiation Corrections (02-151) [Galloway]
6.5      SPI-5 Wording Changes [Evans]
7.     Review of Recommendations to the Plenary
8.     Meeting Schedule
9.     Adjournment

Results of Meeting

1.     Opening Remarks

John Lohmeyer, the T10 Chair, called the meeting to order at 9:00 a.m.,
Monday, April 29, 2002. He thanked Zane Daggett of Hitachi Cable Manchester
for hosting the meeting.

As is customary, the people attending introduced themselves and a copy of the
attendance list was circulated.


2.     Approval of Agenda

The draft agenda was approved with the following changes:

4.5      Ultra640 SCSI, Reduction of Crosstalk Errors During Timing Deskew
(02-163) [Brown & Aliahmad]

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

6.5      SPI-5 Wording Changes [Evans]


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. Nicholaos          V  C&M Corp.                 nlimberopoulos@
Limberopoulos                                       cmcorporation.com
Mr. Robert C. Elliott  P  Compaq Computer Corp.     Robert.Elliott at compaq.com
Dr. William Ham        A  Compaq Computer Corp.     bill_ham at ix.netcom.com
Mr. Steven Fairchild   V  Compaq Computer Corp.     Steve.Fairchild at compaq.
                                                     com
Mr. Titkwan Hui        P  Dallas Semiconductor      tk.hui at dalsemi.com
Mr. Ralph O. Weber     P  ENDL Texas                roweber at acm.org
Mr. Nathan Hastad      P  General Dynamics          nathan.hastad at gd-ais.com
Mr. Zane Daggett       P  Hitachi Cable Manchester  zdaggett at hcm.hitachi.com
Mr. George O. Penokie  P  IBM / Tivoli Systems      gop at us.ibm.com
Mr. Christopher Ro     V  IBM Corp.
Mr. John Lohmeyer      P  LSI Logic Corp.           lohmeyer at t10.org
Mr. William Petty      A  LSI Logic Corp.           william.petty at lsil.com
Mr. Travis Bradfield   V  LSI Logic Corp.           travis.bradfield at lsil.com
Mr. Dave Gissel        V  LSI Logic Corp.           david.gissel at lsil.com
Ms. Jie Fan            P  Madison Cable Corp.       jie.fan at madisoncable.com
Mr. Mark Evans         P  Maxtor Corp.              mark_evans at maxtor.com
Mr. Russ Brown         V  Maxtor Corp.              russ_brown at maxtor.com
Mr. Jay Neer           P  Molex Inc.                jneer at molex.com
Mr. James R. (Bob)     AV Network Appliance Inc.    bob at netapp.com
Davis
Mr. Charles Monia      P  Nishan Systems Inc.       cmonia at nishansystems.com
Mr. Ting Li Chan       V  QLogic Corp.              ting.chan at qlogic.com
Mr. Gerald Houlder     P  Seagate Technology        gerry_houlder at seagate.com
Mr. Umesh Chandra      V  Seagate Technology        umesh_chandra at seagate.com
Mr. Vit Novak          P  Sun Microsystems, Inc.    vit.novak at sun.com
Mr. Paul D. Aloisi     P  Texas Instruments         Paul_Aloisi at ti.com
Mr. Ron Mathews        AV UNISYS Corporation        ronald.mathews at unisys.com

28 People Present

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


4.     SPI-5 Topics

4.1    SPI-5 Testing [Manildi]

In the absence of Bruce Manildi, Umesh Chandra reported to the group on Ultra
640 testing. He noted that Ultra 320 backplanes appear to work at Ultra 640
and stated that detailed information will be ready for presentation at the
next meeting.

4.2    SPI-5 Status [Penokie]

George Penokie reviewed the editor's notes in SPI-5 revision 0 with the result
that the group agreed to the editorial changes.

4.3    Messages During Packetized [Bellamy]

This topic was discussed under new business item 6.3.

4.4    Negotiation Issues [Galloway]

This topic was discussed under new business item 6.4.

4.5    Ultra640 SCSI, Reduction of Crosstalk Errors During Timing Deskew
(02-163) [Brown & Aliahmad]

Russ Brown presented a discussion of crosstalk issues in SPI-5 (02-163r0). The
goal of the presentation was to explain the rational for a modification to the
training pattern to compensate for identified crosstalk issues. The group
agreed that the proposed modification to the training pattern would better
center the resulting compensation with respect to whatever crosstalk effects
exist. The complexity of the proposed training pattern changes was discussed
and the group agreed that the changes appeared to be practical for most
implementations, but some of those present reserved the right to review the
detailed proposal.

Based on the agreements reached by the group, Mark Evans offered to prepare a
detailed proposal for next time.


5.     Old Business

5.1    Project Proposal for SPI-6 (01-145) [Lohmeyer]

John Lohmeyer asked that this item be deferred to the July meeting.

5.2    PIP Report [Ham]

Bill Ham reported that PIP is holding one meeting every two weeks in at
attempt to get finished. The goal is to hold a letter ballot in July and to be
finished well in advance of SPI-5. Bill offered to review the document
personally with anyone who is interested.


6.     New Business

6.1    Inconsistent use of 'assertion and negation' in SPI-4 (02-114)
[Houlder]

Gerry Houlder asked that this item be covered in combination with item 6.2.

6.2    Public Review Comment #1 on INCITS 362 (SPI-4) (02-129) [Houlder]

After a brief review of the issues raised by the SPI-4 public review comment,
Gerry Houlder moved to recommend that T10 accept the public review comment on
SPI-4 (02-129r0). Mark Evans seconded the motion.

Mark and Gerry noted that the changes caused by accepting the public review
comment affect only the minimum length of time at the beginning of a phase
during which a transmitter is required to remain invalid while sending clock
signals. The change reduces the minimum time from 200 ns to 100 ns.

Ting Chan asked about whether the 100 ns value is a minimum value or exactly
required value. George explained that it is a minimum.

Mark noted that the circumstances resulting in the need for this change are an
unfortunate decision to design to a "e.g." example in the dpANS and called
upon those present to refrain from designing to examples in the future.

Ting stated his opposition to reducing the value to 100 ns minimum, noting
that the only work around is to require training on every new data transfer
phase. George and others disagreed with this assessment.

The motion passed on a vote of 9:3:7.

The group unanimously agreed that the change would be substantive.

George noted that the wording in SPI-4 is confusing and that just changing the
numbers in SPI-4 (as requested by the public review comment) could lead to
additional confusion with the result that some implementations might use 50
ns. He asked the group to consider rolling the SPI-5 wording into SPI-4. He
reviewed the SPI-5 wording with the group. Concerns were raised about the lack
of review on the SPI-5 material.

George Penokie moved that the editor be instructed to take the SPI-5 r0
wording in subclauses 10.7.4.2.2 10.7.4.2.3 and 10.7.4.3.3 and replace the
equivalent subclauses in SPI-4 with that text as a non-substantive change.
Bill Galloway seconded the motion. In the absence of any objections, the
motion passed unanimously.

6.3    Link control message correction (02-150) [Galloway]

Bill Galloway moved that the group recommend 02-150r0 for inclusion in SPI-5.
Gerry Houlder seconded the motion. Rob Elliott questioned text reading "if
messages are allowed". George noted that the text should name the specific
messages and Bill agreed to prepare a new revision. By agreement of Bill and
Gerry, the motion was amended to reference r1. In the absence of any
objections, the amended motion passed unanimously.

6.4    Negotiation Corrections (02-151) [Galloway]

Bill Galloway reviewed the proposal in 02-151r0 and corrections were
requested.

Bill Galloway moved that 02-151r1 (r0 as modified) be recommended for
inclusion in SPI-5. Rob Elliott seconded the motion. In the absence of any
objections, the motion passed unanimously.

6.5    SPI-5 Wording Changes [Evans]

Mark Evans discussed editorial wording changes with George Penokie. George
agreed to make the changes in the next revision of SPI-5.


7.     Review of Recommendations to the Plenary

Ralph Weber noted that the following recommendations have been made to the T10
plenary:

Accept the SPI-4 PR comment (02-129r0) [Houlder] {9:3:7 - substantive}
Link control message correction (02-150r1) [Galloway] {SPI-5, r0 as revised}
Negotiation Corrections (02-151) [Galloway] {SPI-5, r0 as revised}


8.     Meeting Schedule

The next meeting of the Parallel SCSI Working Group will be Monday July 15,
2002 commencing at 9:00 a.m. in Colorado Springs, CO at the Wyndham Colorado
Springs Hotel (719-260-1800).


9.     Adjournment

The meeting was adjourned at 12:30 p.m. on Monday, April 29, 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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