Draft minutes of SCSI Physical WG - 1/10-11/00

John Lohmeyer lohmeyer at t10.org
Wed Jan 19 10:21:54 PST 2000


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

  ftp://ftp.t10.org/t10/document.00/00-120r0.pdf

Accredited Standards Committee*
National Committee for Information Technology Standards (NCITS)

                                                   Doc. No.: T10/00-120r0
                                                       Date: January 19, 2000
                                                   Reply to: John Lohmeyer

To:       T10 Membership
From:     Ralph Weber and John Lohmeyer
Subject:  SCSI Physical Working Group Meeting -- January 10-11, 2000
          Surfers Paradise, Queensland, Australia


Agenda
1.     Opening Remarks
2.     Approval of Agenda
3.     Attendance and Membership
4.     SPI-3 Topics
4.1      SPI-3 Letter Ballot Comments Review [Penokie]
4.2      Packetized L_Q IU type field changes (reflector messages) [Penokie]
4.3      WDTR/SDTR/PPR Interactions (00-119) [Penokie]
4.4      Breaking a multiple type command sequence (reflector messages)
[Srinivasan]
5.     SPI-4 Topics
5.1      Load Compensation [Novak]
5.2      SCSI out of band communications method (99-213) [Petty]
5.3      Extended Addressing for SPI-4 (99-249, 99-250) [Monia]
5.4      SPI-4 ISI reduction via transmit pre-compensation (99-260, 99-332)
[Petty]
5.5      SPI-4 timing budget utilizing receiver signal deskew method (99-261)
[Petty]
5.6      SPI-4 clocking proposal (99-262) [Petty]
5.7      Margin Control (99-264) [Lamers]
5.8      Flow Control & Continue I/O Process Flag (99-142) [Lamers]
5.9      Proposal for Fast-160 to be included in SPI-4 (99-295) [Milligan]
5.10     Proposal for turn-on/turn-off of a free-running clock (99-298)
[Evans]
5.11     Fast-160 Phase Encoded Data Enabling (99-323) [Moore]
5.12     ISI Measurements for Ultra4 Discussion (99-326) [Smith]
5.13     ISI Measurements (99-337) [Bridgewater/Bastiani]
5.14     Expander Guidelines (99-282) [Lamers]
5.15     Echo Buffer Considerations (99-306) [Lamers]
5.16     Compensation Techniques (00-104) [Bishop]
5.17     Implementing Transmit Precompensation (00-103) [Uber]
5.18     Ultra 320 Calibration Strategy (00-105) [Brown]
5.19     Ultra 320 Summary and Conclusions (00-106) [McGarrah]
5.20     Use of eye measurements [Bastiani]
6.     Domain Validation Technical Report Topics
7.     New Business
8.     Meeting Schedule
9.     Adjournment






Results of Meeting

1.     Opening Remarks

John Lohmeyer, the T10 Chair, called the meeting to order at 1:40 p.m., Monday
January 10, 2000.  He thanked Dal Allan of ENDL Pacific Technologies 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 no changes.

No agenda items were added or revised during the course of the meeting.


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. Vincent Bastiani   A# Adaptec, Inc.             bastiani at corp.adaptec.com
Mr. Robert C. Elliott  P  Compaq Computer Corp.     Robert.Elliott at compaq.com
Mr. Neil Wanamaker     P  Crossroads Systems, Inc.  ntw at crossroads.com
Mr. George O. Penokie  P  IBM Corp.                 gop at us.ibm.com
Mr. Dennis Moore       P  KnowledgeTek, Inc.        dmoore at ix.netcom.com
Mr. John Lohmeyer      P  LSI Logic Corp.           lohmeyer at t10.org
Mr. Ralph O. Weber     A  LSI Logic Corp.           roweber at acm.org
Mr. Jay Neer           P  Molex Inc.                jneer at molex.com
Mr. Mark Evans         P  Quantum Corp.             mark.evans at quantum.com
Mr. Gene Milligan      P  Seagate Technology        Gene_Milligan at notes.
                                                    seagate.com
Mr. Bill Gintz         V  Seus, Inc.                wcgintz at ix.netcom.com

Mr. Robert N. Snively  P  Sun Microsystems          bob.snively at sun.com
                          Computer Co
Mr. Vit Novak          A  Sun Microsystems, Inc.    vit.novak at sun.com
Mr. Paul D. Aloisi     P  Texas Instruments         Paul_Aloisi at ti.com

14 People Present

Status Key:  P    -  Principal
             A,A# -  Alternate
             O    -  Observer
             L    -  Liaison
             V    -  Visitor


4.     SPI-3 Topics

4.1    SPI-3 Letter Ballot Comments Review [Penokie]

George Penokie led a review of the comments resolution for the letter ballot
on forwarding SPI-3 to first public review (99-350r1).  George noted that Bill
Ham of Compaq had reviewed the resolutions for his comments prior to this
meeting.

Neil Wanamaker defended his letter ballot comment that the use of RESTORE DATA
POINTERS in packetized for error recovery in SPI-3 lacks functionality that
was present for parallel in SPI-2.  George stated that the packetized
definition was appropriate because packetized is a new feature that does not
work the same as non-packetized SCSI and does not need the same error recovery
capabilities in its RESTORE DATA POINTERS function.

In response to comments from Rob Elliott, the use of capitalization and small
caps was changed in several places relating to the packetized failure code
field.

In response to a comment from Gene Milligan, the group decided to continue
allowing the use of TERMPWR for powering devices other than terminators, but
to make the details of such use outside the scope of the standard, thus
returning SPI-3 to nearly the same position as what appeared in SPI-2.

In response to comment 9.2.28 (see 99-350r1), the group agreed on specific
wording changes to the definition of the REQ/ACK period.

The group investigated problems with the hot plugging behavior of the SCA-2
connector and agreed on several steps to be taken over the course of this
meeting and the next meeting to finalize a response.

George discussed the Quantum comments with Mark Evans, noting that this was
the first time Mark was able to attend a comments resolution review meeting.
Mark agreed that all his comments had been resolved satisfactorily.

At the completion of the review, George stated that all comment resolutions
had been discussed with the comment authors and that, in his opinion, the
process of resolving the letter ballot comments was complete.  He stated an
intention to request approval of the letter ballot comment resolution at the
plenary meeting.

4.2    Packetized L_Q IU type field changes (reflector messages) [Penokie]

George Penokie reported that this issue has been resolved in SPI-3 revision 12
and documented in the comments resolution document 99-350r1.

4.3    WDTR/SDTR/PPR Interactions (00-119) [Penokie]

George Penokie led the group in a discussion of how a target negotiates out of
a transfer mode that cannot be entered except via a PPR (Parallel Protocol
Request) message.  Per an agreement from the December meeting, use of the PPR
message is restricted to the initiator (to support legacy bus expanders).  So,
the target must have a way to use the SDTR (Synchronous Data Transfer Request)
and WDTR (Wide Data Transfer Request) messages to negotiate out of a state
that must have been established by a PPR message.

Following some discussions and inspections of old documents outside the
meeting, George presented a substantially revised proposal.  He showed that no
conflicts occur in wording that previously thought to contain internal
conflicts because one paragraph at issue referred to SDTR not WDTR.  He
proposed that a model section be developed for SPI-4.  Then, he reviewed
specific minor changes to be made in SPI-3.

In the absence of any objections, the group recommended approval of 00-119r1
(r0 as revised) for inclusion in SPI-3 coincident with the letter ballot
comment resolution.

4.4    Breaking a multiple type command sequence (reflector messages)
[Srinivasan]

In response to an e-mail message from Sriram Srinivasan, the group agreed to

wording changes in SPI-3, to be handled as resolution of a letter ballot
comment.  The wording agreed to by the group differed from the wording
proposed in the e-mail.  George recorded the action agreed by the group in the
comments resolution document (99-350r2) as comment number 178.5.


5.     SPI-4 Topics

5.1    Load Compensation [Novak]

Vit reported that no new material is ready for presentation.  He gave the
group a brief review of his current work and the difficulties preventing
further progress.  Vit asked that this item be dropped from future agendas,
until he requests time to present new information.

5.2    SCSI out of band communications method (99-213) [Petty]

This topic was deferred to a future meeting.

5.3    Extended Addressing for SPI-4 (99-249, 99-250) [Monia]

This topic was deferred to a future meeting.

5.4    SPI-4 ISI reduction via transmit pre-compensation (99-260, 99-332)
[Petty]

This topic was deferred to a future meeting.

5.5    SPI-4 timing budget utilizing receiver signal deskew method (99-261)
[Petty]

This topic was deferred to a future meeting.

5.6    SPI-4 clocking proposal (99-262) [Petty]

This topic was deferred to a future meeting.

5.7    Margin Control (99-264) [Lamers]

This topic was deferred to a future meeting.

5.8    Flow Control & Continue I/O Process Flag (99-142) [Lamers]

This topic was deferred to a future meeting.

5.9    Proposal for Fast-160 to be included in SPI-4 (99-295) [Milligan]

Gene Milligan presented a foil from 99-295 showing the setup and hold times.
He asked the group how we should specify setup and hold timing given that the
clocking signals will transition at the same time as the data signals.  The
conclusion was that since the skew compensation circuitry in the receiver
creates the setup and hold times, there is no need to specify setup and hold
times for Fast-160.

5.10   Proposal for turn-on/turn-off of a free-running clock (99-298) [Evans]

This topic was deferred to a future meeting.

5.11   Fast-160 Phase Encoded Data Enabling (99-323) [Moore]

This topic was deferred to a future meeting.

5.12   ISI Measurements for Ultra4 Discussion (99-326) [Smith]

This topic was deferred to a future meeting.

5.13   ISI Measurements (99-337) [Bridgewater/Bastiani]

This topic was deferred to a future meeting.

5.14   Expander Guidelines (99-282) [Lamers]

This topic was deferred to a future meeting.

5.15   Echo Buffer Considerations (99-306) [Lamers]

This topic was deferred to a future meeting.

5.16   Compensation Techniques (00-104) [Bishop]

This topic was deferred to a future meeting.

5.17   Implementing Transmit Precompensation (00-103) [Uber]

This topic was deferred to a future meeting.

5.18   Ultra 320 Calibration Strategy (00-105) [Brown]

This topic was deferred to a future meeting.

5.19   Ultra 320 Summary and Conclusions (00-106) [McGarrah]

This topic was deferred to a future meeting.

5.20   Use of eye measurements (00-126r0) [Bastiani]

Vince Bastiani presented preliminary concepts for a eye diagram method to
verify proper operation of a transmitter.  The group raised several issues
that were boiled down to lack of proper translation of the concepts to a
parallel transfer environment from the serial Fibre Channel specifications
that Vince used as a source for the presentation.  Vince agreed to bring a
revised presentation to the next meeting and to continue working on a formal
proposal.


6.     Domain Validation Technical Report Topics

This topic was deferred to a future meeting.


7.     New Business

No new business was brought before the group.


8.     Meeting Schedule

The next meeting of the SCSI Physical Working Group will be Wednesday,
February 9, 2000 commencing at 1 p.m. recessing on Wednesday evening and
resuming at 9 a.m. until 6 p.m. on Thursday, February 10, 2000 at the Hilton
Waterfront Hotel (714-960-7873) in Huntington Beach, CA hosted by QLogic Corp.

See 00-116 for meeting arrangements.

The subsequent meeting of this group is Tuesday, March 7, 2000 commencing at 9
a.m. until 8 p.m. at the Crowne Plaza Suites (972-233-7600) in Dallas, TX
hosted by Texas Instruments.

The group proposed additional Physical Working Group meetings on March 27
starting at 1 pm and continuing to March 28 in Monterey, CA and April 27
starting at 1 pm and continuing to April 28 in Colorado Springs, CO.

Paul Aloisi requested that the Cable Performance and Signal Modeling Working
Groups meeting schedules be included in these minutes.  They are:

Meeting          Date                Location / Contact
--------------  ------------------  --------------------------------------
Cable Perf. SG  02/07/00 Mon 1:00p  Huntington Beach, CA / Jones
SCSI Model WG   02/08/00 Tue 9:00a  Huntington Beach, CA / Jones
Cable Perf. SG  02/29/00 Tue        Manchester, NH / Daggett
SCSI Model WG   03/01/00 Wed        Manchester, NH / Daggett
Cable Perf. SG  04/11/00 Tue        Monterey, CA / Abou-Jeyab
SCSI Model WG   04/12/00 Wed        Monterey, CA / Abou-Jeyab


9.     Adjournment

The meeting was adjourned at 4:00 p.m. on Tuesday January 11, 2000.

--
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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