Draft minutes of parallel SCSI WG - September 11, 2001

John Lohmeyer lohmeyer at t10.org
Mon Sep 17 14:59:19 PDT 2001


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

    ftp://ftp.t10.org/t10/document.01/01-277r0.pdf

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

                                                  Doc. No.: T10/01-277r0
                                                      Date: September 17, 2001
                                                  Reply to: John Lohmeyer
To:       T10 Membership
From:     Ralph Weber & John Lohmeyer
Subject:  Parallel SCSI Working Group Meeting -- September 11, 2001
           Huntington Beach, CA

Agenda
1.     Opening Remarks
2.     Approval of Agenda
3.     Attendance and Membership
4.     SPI-4 Topics
4.1      SPI-4 Physical Topics
4.1.1      Periodic structures on SCSI buses (00-352) [Barnes]
4.2      SPI-4 Protocol Topics
4.2.1      SPI-4 negotiation message rewrite (01-131) [Elliott]
4.2.2      Bad IU Error Recovery (01-226) [Galloway/Elliott]
4.2.3      Clarification of SPI-4 DT Data Group Pad and pCRC Transfers
(01-251) [Lohmeyer]
4.2.4      Training Gap (Brown)
4.2.5      Disable PreComp During Training (Evans)
4.2.6      Message After Streaming (Penokie)
4.3      SPI-4 working draft review [Penokie]
4.3.1      Minor Issues in SPI-4 Draft (01-271) [Moore]
4.3.2      Adding Relationship to Developing Standards (01-294) [Aloisi]
4.3.3      SPI-4 Revision 06 Review (Penokie)
5.     SPI-5 Topics
5.1      Removal of SE and MSE from SPI-5 (01-236) [Aloisi]
5.2      SPI-5 Programmable Termination (01-270) [Aloisi]
6.     Old Business
6.1      SDV Recommendations to Change Wording in SPI-4 (01-149) [Ham/Elliott]
6.2      Project Proposal for SPI-6 (01-145) [Lohmeyer]
7.     New Business
8.     Review of Recommendations to the Plenary
9.     Meeting Schedule
10.    Adjournment

Results of Meeting

1.     Opening Remarks

John Lohmeyer, the T10 Chair, called the meeting to order at 9:00 a.m.,
Tuesday, September 11, 2001. He thanked Skip Jones of QLogic 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:

4.2.4      Training Gap [Brown]
4.2.5      Disable PreComp During Training [Evans]
4.2.6      Message After Streaming [Penokie]
4.3.2      Adding Relationship to Developing Standards [Aloisi]

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

4.3.3      SPI-4 Revision 06 Review [Penokie]


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. Vince Bastiani     A  Bass Technology           bass.tech at gte.net
                           Consulting
Mr. Bill Galloway      P  BREA Technologies, Inc.   billg at breatech.com
Mr. Mike Kosco         V  Chip Craft Corp.          mike at chipcraft.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. Wayne Bellamy      V  Compaq Computer Corp.     wayne.bellamy at compaq.com
Mr. Robert Griswold    P  Crossroads Systems, Inc.  rgriswold at crossroads.com
Mr. Titkwan Hui        A  Dallas Semiconductor      tk.hui at dalsemi.com
Mr. Kevin Marks        P  Dell Computer Corp.       kevin_marks at dell.com
Mr. Ralph O. Weber     P  ENDL Texas                roweber at acm.org
Mr. Eugene Lew         P  Fujitsu                   elew at fcpa.fujitsu.com
Mr. George O. Penokie  P  IBM / Tivoli Systems      gop at us.ibm.com
Mr. John Lohmeyer      P  LSI Logic Corp.           lohmeyer at t10.org
Mr. William Petty      A  LSI Logic Corp.           william.petty at lsil.com
Mr. Brian Day          V  LSI Logic Corp.           brian.day at lsil.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. Skip Jones         P  QLogic Corp.              skip.jones at qlogic.com
Mr. Richard Moore      A# QLogic Corp.              richard.moore at qlogic.com
Mr. Tim Hsia           V  QLogic Corp.              tim.hsia at qlogic.com
Mr. Henry Kuo          V  QLogic Corp.              henry.kuo at qlogic.com
Mr. Gerald Houlder     P  Seagate Technology        gerry_houlder at seagate.com
Mr. Jim Coomes         V  Seagate Technology        jim_coomes at seagate.com
Mr. Kenneth Moe        P  Sun Microsystems, Inc.    kenneth.moe at sun.com
Mr. Paul D. Aloisi     P  Texas Instruments         Paul_Aloisi at ti.com
Mr. Donald R. Getty    A  Texas Instruments         donald_getty at ti.com
Mr. Ron Mathews        AV UNISYS Corporation        ronald.mathews at unisys.com

29 People Present

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


4.     SPI-4 Topics

4.1    SPI-4 Physical Topics

4.1.1  Periodic structures on SCSI buses (00-352) [Barnes]

In the absence of Larry Barnes, discussion of this topic was deferred to the
November meeting.

John agreed to move this topic to SPI-5 on the November agenda.

4.2    SPI-4 Protocol Topics

4.2.1  SPI-4 negotiation message rewrite (01-131) [Elliott]

Rob Elliott presented 01-131r3, the SPI-4 negotiation message rewrite revision
resulting from comments received at the July working group meeting. Bill
Galloway raised several concerns, including a problem with "invalid" transfer
parameters. It was agreed that "invalid" transfer parameters really is
intended to mean that a "negotiation is required".

Rob Elliott moved that 01-131r4 (r3 as revised) be recommended for inclusion
in SPI-4. Bill Galloway seconded the motion. In the absence of any objections,
the motion passed unanimously.

4.2.2  Bad IU Error Recovery (01-226) [Galloway/Elliott]

After a brief presentation, Bill Galloway moved that 01-226r1 be recommended
for inclusion in SPI-4. Rob Elliott seconded the motion. In the absence of any
objections, the motion was approved unanimously.

4.2.3  Clarification of SPI-4 DT Data Group Pad and pCRC Transfers (01-251)
[Lohmeyer]

John Lohmeyer presented proposals intended to resolve a deadlock situation. He
noted that the problem can be corrected by requiring changes in the initiator
or in the target. Bill Galloway asked if the problem could be corrected by
requiring both sides to change. John noted that such a solution was what the
committee decided to do in SPI, but it went beyond what was necessary to solve
the problem.

John presented two specific proposals, one for initiator requirements and one
for target requirements. The changes in target requirements were deemed more
desirable as all the target hardware manufacturers in the room felt they
already met the modified requirements.

John Lohmeyer moved that the target requirements version of the document be
recommended as 01-251r1 (r0 as revised) for inclusion in SPI-4. Skip Jones
seconded the motion. The motion passed on a vote of 11:0:5.

4.2.4  Training Gap [Brown]

Mark Evans reported a problem with the words describing DT DATA OUT Phase
Training. George Penokie agreed that the words need editorial correction and
details of the correction would be worked out in the document review part of
the meeting (see item 4.3.3).

4.2.5  Disable PreComp During Training [Evans]

Mark Evans presented a concern about the clarity of the description of signal
strength when precompensation is required to be disabled during training. One
of the difficulties encountered in developing corrective wording was the fact
that, when precompensation is negotiated to be disabled, the standard has no
concept of strong and weak driver levels, meaning that those terms cannot be
used in comprehensive replacement wording.

The group agreed that the disable precompensation wording will be changed to,
"if precompensation is enabled use the strong driver level." No reference to
precompensation disabled was deemed necessary because there is only one level
in that circumstance.

4.2.6  Message After Streaming [Penokie]

George Penokie described a corner case in stopping data streaming. The group
agreed that nothing was really broken because the target has to deal with
whatever the initiator does. George agreed that no changes would be made in
SPI-4.

4.3    SPI-4 working draft review [Penokie]

4.3.1  Minor Issues in SPI-4 Draft (01-271) [Moore]

Richard Moore presented three problems with wording in SPI-4 (01-271r0).
Richard Moore moved that 01-271r0 be recommended for inclusion in SPI-4. Rob
Elliott seconded the motion. In the absence of any objections, the motion
passed unanimously.

4.3.2  Adding Relationship to Developing Standards (01-294) [Aloisi]

Paul Aloisi requested the addition of references to PIP, SSM, and SDV to SPI-4
in the 'references to documents in development' section (01-294). George
Penokie raised concerns about adding normative references to technical
reports. The reference to SSM was switched to SSM-2, which is a standard, but
no similar resolution was possible for the SDV reference.

Paul Aloisi moved that 01-294r0 be recommended for inclusion in SPI-4. Bill
Ham seconded the motion. The motion passed on a vote of 5:1:6.

4.3.3  SPI-4 Revision 06 Review [Penokie]

George Penokie led a review of outstanding issues in SPI-4.

George Penokie moved that the group recommend that SPI-4 be modified in
subclause 10.5.2.3 to change the wording that says "?any task management
message is allowed?" to "?the target reset message is allowed?". Bill Galloway
seconded the motion. In the absence of any objections, the motion passed
unanimously.

George stated a plan to hold a letter ballot on forwarding SPI-4 revision 7 to
public review and the group concurred.


5.     SPI-5 Topics

5.1    Removal of SE and MSE from SPI-5 (01-236) [Aloisi]

Paul Aloisi presented a proposal that single ended and multimode single ended
be removed from SPI-5 (01-236r1). The group discussed the effects of the
removal on the industry and especially on disk drive manufacturers. While
trauma was predicted for some customers, the difficulty of maintaining 5 volt
support in SPI-5 components was presented as a critical problem to be solved
in SPI-5.

Paul Aloisi moved 01-236r1 (r0 as revised) be recommended for inclusion in
SPI-5. Vince Bastiani seconded the motion. In the absence of any objections,
the motion passed unanimously.

5.2    SPI-5 Programmable Termination (01-270) [Aloisi]

Paul Aloisi presented 01-270r0, a proposal to change the definition of
terminators in SPI-5 to allow terminators to be programmable as SES devices
with an I2C interface between the SES device and the terminator. Although
there was agreement that terminator characteristics might need to be more
adjustable in SPI-5, solutions other than programmable terminators were
preferred by several in the group. Paul agreed to review the proposal again at
the November meeting.


6.     Old Business

6.1    SDV Recommendations to Change Wording in SPI-4 (01-149) [Ham/Elliott]

Rob Elliott presented SDV recommendations for changes in SPI-4 (01-149r2). He
noted that r2 is r1 as revised by the SDV working group. The group requested a
minor change in one of the tables.

Rob Elliott moved that 01-149r3 (r2 as revised) be recommended for inclusion
in SPI-4. Paul Aloisi seconded the motion. In the absence of any objections,
the motion passed unanimously.

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

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


7.     New Business

No new business was brought before this meeting.


8.     Review of Recommendations to the Plenary

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

That 01-131r4 (r3 as revised) "SPI-4 negotiation message rewrite" be included
in SPI-4
That 01-149r3 (r2 as revised) "SDV Recommended wording changes" be included in
SPI-4
That 01-226r1 "Bad IU Error Recovery" be included in SPI-4
That 01-251r1 (r0 as revised) "Clarification of SPI-4 DT Data Group Pad and
pCRC Transfers" be included in SPI-4
That 01-271r0 "Minor Issues in SPI-4" be included in SPI-4
That 01-294r0 "Adding Relationship to Developing Standards" be included in
SPI-4
That the SPI-4 subclause 10.5.2.3 be changed where the wording that says "?any
task management message is allowed?" to replace the wording with "?the target
reset message is allowed?".
That 01-236r1 "Removal of SE and MSE from SPI-5" be included in SPI-5
That the chair conduct a letter ballot on forwarding SPI-4 revision 7 for
public review


9.     Meeting Schedule

The next meeting of the Parallel SCSI Working Group will be Tuesday November
6, 2001 commencing at 9:00 a.m. in Seaside, CA at the Embassy Suites Hotel
(831-393-1115).


10.    Adjournment

The meeting was adjourned at 5:15 p.m. on Tuesday, September 11, 2001.


--
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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