Draft minutes of Parallel SCSI WG - May 1, 2001
John Lohmeyer
lohmeyer at t10.org
Wed May 2 13:35:59 PDT 2001
* 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.01/01-141r0.pdf
Accredited Standards Committee*
National Committee for Information Technology Standards (NCITS)
Doc. No.: T10/01-141r0
Date: May 2, 2001
Reply to: John Lohmeyer
To: T10 Membership
From: Ralph Weber & John Lohmeyer
Subject: Parallel SCSI Working Group Meeting -- May 1, 2001
Nashua, NH
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]
4.1.2 Minimum drive levels (01-094) [Bridgewater]
4.1.3 Precomp Cutback Level (01-136) [Manildi]
4.1.4 SPI-4 Timing Budget Question [Petty]
4.1.5 QAS Timing Question [Ham]
4.2 SPI-4 Protocol Topics
4.2.1 Streaming Clarifications (e-mail by Sriram Srinivasan and 01-125)
[Day]
4.2.2 SPI-4 reset cleanup (01-128) [Elliott]
4.2.3 SPI-4 negotiation message rewrite (01-131) [Elliott]
4.2.4 SPI L_Q error handling (reflector message) [Penokie]
4.2.5 Bus Free After Negotiation (reflector message) [Day]
4.3 SPI-4 working draft review [Penokie]
5. New Business
5.1 SDV Recommendations to Change Wording in SPI-4 (01-149) [Ham]
5.2 Project Proposal for SPI-5 (01-144) [Lohmeyer]
5.3 Project Proposal for SPI-6 (01-145) [Lohmeyer]
5.4 Segment Simulation Results (01-126) [Ham]
5.5 SPI-4 Length and Signal Specifications [Ham]
5.6 Does ABORT TASK Clear CA? (reflector message) [Penokie]
6. Review of Recommendations to the Plenary
7. Meeting Schedule
8. Adjournment
Results of Meeting
1. Opening Remarks
John Lohmeyer, the T10 Chair, called the meeting to order at 9:00 a.m.,
Tuesday, May 1, 2001. 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:
4.1.3 Precomp Cutback Level (01-136) [Manildi]
4.1.4 SPI-4 Timing Budget Question [Petty]
4.1.5 QAS Timing Question [Ham]
4.2.5 Bus Free After Negotiation (reflector message) [Day]
5.1 SDV Recommendations to Change Wording in SPI-4 () [Ham]
5.2 Project Proposal for SPI-5 (01-144) [Lohmeyer]
5.3 Project Proposal for SPI-6 (01-145) [Lohmeyer]
5.4 Segment Simulation Results [Ham]
5.5 SPI-4 Length and Signal Specifications [Ham]
The following items were added/revised during the course of the meeting:
5.6 Does ABORT TASK Clear CA? (reflector message) [Penokie]
6 Review of Recommendations to the Plenary
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. Vince Bastiani V Bass Technology bass.tech at gte.net
Consulting
Mr. Bill Galloway P BREA Technologies, Inc. billg at breatech.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. David Rotman V Compaq Computer Corp. david.rotman at compaq.com
Mr. Kevin Marks A Dell Computer Corp. kevin_marks at dell.com
Mr. Ralph O. Weber P ENDL Texas roweber at acm.org
Mr. Douglas Wagner P FCI dwagner at fciconnect.com
Mr. Kim R. Davies V FCI kdavies at fciconnect.com
Mr. Eugene Lew P Fujitsu elew at fcpa.fujitsu.com
Mr. Zane Daggett P Hitachi Cable Manchester, zdaggett at hcm.hitachi.com
Inc
Mr. George O. Penokie P IBM / Tivoli Systems gpenokie at tivoli.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 quantum.com
Mr. Bruce Leshay V Maxtor Corp. bleshay at tdh.qntm.com
Mr. Richard Uber V Maxtor Corp. duber at tdh.qntm.com
Mr. Paul Entzel P Quantum Corp. paul.entzel at quantum.com
Mr. A. Bruce Manildi V Seagate Technology bruce_manildi at seagate.com
Mr. Paul D. Aloisi P Texas Instruments Paul_Aloisi at ti.com
Mr. Phil Shelton V UNISYS Corporation phil.shelton at unisys.com
23 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
July meeting.
4.1.2 Minimum drive levels (01-094) [Bridgewater]
Vince Bastiani requested that this item be dropped from this and future
agendas.
4.1.3 Precomp Cutback Level (01-136) [Manildi]
Bruce Manildi presented laboratory data showing the effects of precomp cutback
(01-136r0). After reviewing the data, Bruce propose that the range of weak
driver levels be changed from 50%-66% to 60%-75%. Concerns were raised about
how the proposed changes affect the cable configurations. The group agreed to
only half of the proposed changes and Bruce agreed to prepare a new revision
of the proposal for the next meeting.
4.1.4 SPI-4 Timing Budget Question [Petty]
Bill Petty raised questions about how the Transmit assertion period and
Transmit negation period values are computed to the values shown in Table 35
in SPI-4 revision 4. The group explained how the numbers were picked (not
exactly computed). Some of those present wanted to consider making a proposal
for changes but consideration was deferred pending delivery of the proposal.
4.1.5 QAS Timing Question [Ham]
Bill Ham asked if the QAS timing budget included enough time for expanders and
received an answer of yes.
4.2 SPI-4 Protocol Topics
4.2.1 Streaming Clarifications (01-124 and 01-125) [Day]
Brian Day presented a request that a target may use either streaming or
non-streaming to complete a read transfer requested with streaming enabled
(01-124r0). The group discussed how best to represent the options in SPI-4
with George taking advisory notes to be applied to the next SPI-4 revision.
Brian presented a request for two clarifications regarding error handling on
streaming transfers. Brian Day moved that 01-125r1 (r0 as revised to remove
all but the changes to item g) be approved for inclusion in SPI-4. Bill
Galloway seconded the motion. The motion passed 9:0:2.
4.2.2 SPI-4 reset cleanup (01-128) [Elliott]
Rob Elliott presented a proposal to clarify a SPI target's response to logical
unit reset as well as to cleanup several other problems with reset terminology
and descriptions in SPI-4 (01-128r1). Minor corrections were agreed and Rob
promised a new revision. Rob Elliott moved that 01-128r2 (r1 as revised) be
accepted for inclusion in SPI-4. Bill Galloway seconded the motion. The
motion passed on a vote of 6:0:5.
4.2.3 SPI-4 negotiation message rewrite (01-131) [Elliott]
Rob Elliott presented a proposal (01-131r1) to rewrite the discussion of SDTR,
WDTR, and PPR including reorganization of the text to form a model subclause
and definitions subclauses. He noted that only r0 has been posted and
corrections are already in the r1 being presented. The group requested
several more corrections and enhancements. Rob agreed to prepare a new
revision for the next meeting.
4.2.4 SPI L_Q error handling (reflector message) [Penokie]
George Penokie reviewed two error handling problems relating to SPI L_Q
information units. The group discussed the proposal and George agreed to
prepare a proposal. George moved that 01-147r0 be approved for inclusion in
SPI-4. Bill Galloway seconded the motion. In the absence of any objections
the motion was passed unanimously.
4.2.5 Bus Free After Negotiation (reflector message) [Day]
George Penokie presented a question about going bus free after an exception
condition during a WDTR/SDTR negotiation while in packetized mode. The group
agreed that going to bus free was the correct response and it is not an
unexpected bus free because the situation is in the list of expected bus free
scenarios.
4.3 SPI-4 working draft review [Penokie]
George Penokie led a review of SPI-4 revision. Bill Ham asked that
interoperability points (the device connector) be more carefully specified and
George asked Bill to identify specific changes. Bill pointed out places where
he has problems.
Bill Ham agreed to prepare a proposal that cleans up the receiver signal
specifications for SPI-4. He stated a plan to discuss the draft proposal at
the upcoming SSM working group meeting.
5. New Business
5.1 SDV Recommendations to Change Wording in SPI-4 (01-149) [Ham]
Bill Ham reported that the SDV working group is requesting changes in the
margin controls parts of SPI-4 and noted that the request is documented in
01-149r0. The group agreed to discuss the topic in more detail at the next
meeting.
5.2 Project Proposal for SPI-5 (01-144) [Lohmeyer]
Due to the late hour, John Lohmeyer asked everybody to review the SPI-5
project proposal and come to the next meeting prepared to discuss it.
5.3 Project Proposal for SPI-6 (01-145) [Lohmeyer]
Due to the late hour, John Lohmeyer asked everybody to review the SPI-6
project proposal and come to the next meeting prepared to discuss it.
5.4 Segment Simulation Results (01-126) [Ham]
Bill Ham described how the minutes of the recent SSM working group (01-126)
include complete simulation results for a segment of parallel bus cable. He
asked that additional discussion of this topic be deferred to the next
meeting.
5.5 SPI-4 Length and Signal Specifications [Ham]
Bill Ham asked that discussion of this topic be deferred to the next meeting.
5.6 Does ABORT TASK Clear CA? (reflector message) [Penokie]
George Penokie reviewed a very old question about whether an ABORT TASK
message clears a Contingent Allegiance. Due to the late hour, George agreed
to review the issue and return with a proposal to the next meeting.
6. Review of Recommendations to the Plenary
Ralph Weber noted that the following recommendations have been made to the T10
plenary:
o Streaming Clarifications (01-125r1) [Day] - r0 as revised - 9:0:2
o SPI L_Q error handling (01-147r0) [Penokie] - unanimous
o SPI-4 reset cleanup (01-128r3) [Elliott] - r1 as revised - 6:0:5
7. Meeting Schedule
The next meeting of the Parallel SCSI Working Group will be Tuesday July 17,
2001 commencing at 9:00 a.m. in Colorado Springs, CO at the Wyndham Hotel
(719-260-1800).
8. Adjournment
The meeting was adjourned at 7:10 p.m. on Tuesday, May 1, 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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