@ Final Agenda -- X3T9.2 Meeting #84 October 16-17, 1989 -- Raleigh, NC 1. Opening Remarks 2. Approval of Agenda 3. Attendance and Membership 3.1 Roll Call of Members in Jeopardy 4. Approval of Minutes - August Meeting Col Spg, CO (X3T9.2/89-111) 5. Document Distribution 6. Liaison Reports 6.1 ISO 6.2 IT8 6.3 SCSI-2 Common Access Method Committee Report 6.4 Fiber Channel 6.5 X3B7 Report 7. Review of Old Action Items 8. Working Group and/or Project Status Reports 8.1 ESDI 8.2 SCSI General Working Group (X3T9.2/89-120) 8.3 SCSI Transceiver Special Working Group 8.4 Report on Cable Impedance Special Working Group Meeting (Tuesday a.m.) 9. Old Business 9.1 Cable Testing Results (Tuesday a.m.) 9.2 Single-Ended Terminator Specification Issues (89-115) (Tuesday a.m.) 9.3 Single-cable 16-bit SCSI (X3T9.2/89-94 Rev 3) 9.4 SCSI Transceivers 10. New Business 10.1 SCSI-2 Public Review Comment (X3T9.2/89-106) 10.2 SCSI-3: Evolutionary or Revolutionary? 10.3 Packetized SCSI (X3T9.2/89-36 R1) 10.4 Review of new documents 10.5 Agenda for the Santa Ana Working Group 10.6 Errors found in SCSI-2 Rev 10b 10.7 Should SCSI-2 replace SCSI-1? 10.8 Call for Volunteers -- X3T9.2 Chairman and Vice Chairman (89-125) 11. Review of Action Items 12. Meeting Schedule 12.1 General Working Group Schedule for 1990 13. Adjournment Minutes -- X3T9.2 Meeting #84 October 16-17, 1989 -- Raleigh, NC 1. Opening Remarks John Lohmeyer, the chairman, called the meeting to order at 9:00 a.m., Monday October 21, 1989. He thanked Dan Pitt of IBM Corporation for hosting the meeting and he also thanked Classic Conferences for arranging the meeting. The chairman announced that X3 had approved the ESDI standard and that it has been sent to ANSI for the Board of Standards Review approval. Dal Allan is the technical editor. Final editing and publication should occur within a few months. He also announced that SCSI-2 Revision 10b had been forwarded by X3T9 to X3 at its August 25 meeting by a vote of 17 yes, 0 no, 0 abstain, and 5 absent. SPARC has found SCSI-2 in compliance with its project proposal. The first public review period for SCSI-2 is from October 20, 1989 until February 16, 1990. [Sermon on] The chairman announced that Del Shoemaker, X3T9 chairman, had requested that people attending the various X3T9 meetings verify that they are registered with the hotel in the X3T9 group rate. At least 14 people had not identified themselves with the group. It is very important that people use the group name when making room reservations. The costs of the meeting rooms, audio visual equipment, refreshments, and meeting planners are all included in the group rate. Even though this often results in a room rate that is somewhat higher than the corporate rate, this is a fair and effective way to share the meeting costs. If too many people fail to use the group rate, then we may be forced to impose a meeting fee. This would create some new problems. Besides needing to set up a treasurer to collect the meeting fee, we would have to provide controls to insure people attending the meeting actually paid their fee. IEEE 802 has adopted meeting fees with the usual fee set at $125.00. While this fee includes a copying service which we do not have, it is easy to see that the meeting fee solution can be far more costly than our current system. People should make sure to correctly identify the group, even if this means making their own room reservations. [Sermon Off] As is customary, the attendees introduced themselves. A copy of the X3T9.2 membership list was circulated for attendance and corrections. Copies of a revised draft agenda and the recent document register were made available to all attendees. Information on X3T9.2 and Mailing Subscription forms were made available for new attendees. 2. Approval of Agenda The draft agenda was approved with the following additions: 9.4 SCSI Transceivers 10.6 Errors found in SCSI-2 Rev 10b 10.7 Should SCSI-2 replace SCSI-1? 10.8 Call for Volunteers -- X3T9.2 Chairman and Vice Chairman (89-125) 3. Attendance and Membership The membership requirements were reviewed. X3 rules permit one vote per organization. An individual from a new organization must attend one plenary meeting as an observer before he/she may apply for voting membership via a letter to the chairman of X3T9.2. The individual may vote at the second plenary meeting. Working group meetings do not count toward attendance requirements. The chairman stated that since the last meeting the following changes had occurred in the voting membership: Sam Washburn and Adrienne Turenne have swapped roles with Sam now the principal and Adrienne the Alternate. Thomas Wicklund is now the principal for Ciprico with Richard Taylor the new alternate. During the meeting the following membership changes were received: DuPont Electronics has become a new member with John Walden the principal and Steven Clark the alternate member. Berk-Tek has become a new member with John Gibson the principal and John Osborne the alternate. Astro Cable Company has become a new member with Peter M. Blackford the principal and Anthony P. Gabriel the alternate. Since IMPRIMIS has been sold by Control Data Corp. to Seagate Technology, the three members from IMPRIMIS have been transferred to Seagate Technology as observers. The Control Data membership was transferred to Wayne Sanderson. The net effect of these changes plus the four terminations for non- attendance, below, is that X3T9.2 now has 76 voting organizations down from 77 at the last meeting. Enclosure (1) is the list of attendees at the meeting. Enclosure (2) is the X3T9.2 membership changes since the last minutes and enclosure (3) is the current X3T9.2 membership list. 3.1 Roll Call of Members in Jeopardy The chairman stated that he had sent jeopardy letters to all representatives of the following organizations: ACT Technology, Apple Computer, Archive Corp., Congruent Software, Inc., Datacopy Corp., Exabyte Corp., Interphase Corp., Nat. Inst. of Stnds. & Tech., NEC, Olivetti, OTL Engineering, Priam Corp., Quantum Corp., and Technology Forums, Ltd. The letters said that these organizations had failed to attend two of the last three plenary meetings and that their membership would be terminated unless they attended the October plenary meeting. John Lohmeyer noted that he had phoned Bill Burr, the former chairman of X3T9.2, and offered to make a motion on his behalf to retain the NIST membership. Bill declined saying he did not expect NIST to continue its participation. Members were present from all of the organizations except: Interphase Corp., Nat. Inst. of Stnds. & Tech., OTL Engineering, and Priam Corp. The principals and alternates from these organizations were changed to observer status. 4. Approval of Minutes - August Meeting Col Spg, CO (X3T9.2/89-111) The minutes were approved as written. The following updates in the meeting schedule were mentioned during the discussion: If the August 1991 meeting is hosted by Western Digital, it would be in Irvine, CA not San Diego, CA. The April 1990 meeting will remain during the week of April 23. The hotel contract has not been signed yet, but space has been found at the Hilton in St. Petersburg. An alternative location of Hersey, PA is also being considered. 5. Document Distribution The chairman had not received any complaints about the quality of the mailing, except for the lack of holes. John Lohmeyer accepted an action item to request that future mailings be 3-hole punched. Members with mailing subscription problems should deal directly with Katrina Gray of the X3 Secretariat. She can be reached at (202) 626-5741. John Lohmeyer requested that all documents for the November mailing be sent to him before November 6, 1989. The following new or revised documents were distributed and/or discussed at the meeting: Document Doc Date Author Description of Document ------------- -------- --------------- --------------------------------------- X3T9.2/89-115 8/17/89 Chan/ Matheson Alternative 2 Termination: Worst-Case Analysis and Recommendations X3T9.2/89-124 9/28/89 C. Curry Differential SCSI Concerns X3T9.2/89-125 10/6/89 J. Flanagan Call for Volunteers -- X3T9.2 Chairman and Vice Chairman X3T9.2/89-127 B. Spence MODE SENSE Page Code 00 The current document register is enclosure (4). 6. Liaison Reports 6.1 ISO Gene Milligan provided the following report on the IEC/ISO JTC 1/SC 13 Meeting 25-29 September 1989 in Copenhagen: The basic goal of the U.S. delegation was to strive for international approval of ANS documents which have been proposed as international standards. The goal was achieved. This was the last meeting of SC 13. Further meetings will take place under the auspices of SC 25. Since the bulk of the projects are originating with X3T9, both the Secretariat and the Chairman lobbied for the first business meeting of SC 25 (the November Milan meeting is considered to be an organizational meeting without standards projects on the agenda) to be held in the U.S. They felt it was important to initiate the new committees work at a fitting site. We explained some of the difficulties to host a meeting in the U.S. but agreed to determine if the U.S. would be able to extend an invitation to SC 25 for their first full meeting which should occur in June of 1990. We cautioned the Chair that such an approval was not likely in time for the November organizational session in Milan. During the meeting the following resolutions were passed: Resolution 1: Based upon the technical structure of FDDI, SC 13 resolves to continue the subdivision of FDDI as follows: Existing Project New Project Project 1.3 9314-1 FDDI-PHY Project 1.4 9314-2 FDDI-MAC Project 1.5 9314-3 FDDI-PMD 9314-4 FDDI-SMF-PMD Project 1.6 9314-5 FDDI-HRC Project 1.7 9314-6 FDDI-SMT Project 1.8 Resolution 2: SC 13 requests the ISO Central Secretariat to revise the foreword and nomenclature for all JTC1 standards published in the future to agree with the IEC/ISO JTC1 organization. Resolution 3: SC 13 resolves to progress DIS 9314-3 on FDDI PMD to the Central Secretariat for final processing as an IS with the changes incorporated by the project editor, resulting from the letter ballot along with editorial changes completing the conversion to ISO style. Resolution 4: SC 13 resolves to authorize the Secretariat to issue a DP letter ballot for the Fibre Distributed Data Interface (FDDI) Hybrid Ring Control (HRC), N 546, or a later revision, upon the JTC1 approval of project 1.7. SC 13 further resolves to authorize its secretariat to initiate a DIS letter ballot upon resolution of any DP letter ballot issues concerning 9314-5. The USA National Body will provide the necessary documentation to the SC 13 secretariat concerning the resolution of comments from the DP ballot. Resolution 5: SC 13 resolves to progress a revised DIS 9324 Storage Module Interfaces (SMD) to the Central Secretariat for final processing as an IS with the changes requested by the DIS letter ballot comments as summarized in N 506. Resolution 6: SC 13 resolves in support of resolution 12 of the last meeting in October, 1988, to progress DIS 9318-3 Intelligent Peripheral Interface (IPI) - Part 3: Device Generic Command Set for Magnetic and Optical Disk Drives, to the Central Secretariat for final processing as an IS, after the project editor has incorporated the changes resulting from comments and corrections for consistency with 9318-4. Resolution 7: SC 13 resolves to progress DIS 9318-4 Intelligent Peripheral Interface (IPI) - Part 4: Device Generic Command Set for Magnetic Tape to the Central Secretariat for final processing as an IS, with the changes incorporated in DIS 9318-4 dated 23-SEP-89 along with any changes resulting from the completed DIS letter ballot as stated in document N 549. Resolution 8: SC 13 resolves to progress (DP 9318-7) Intelligent Peripheral Interface (IPI) - Part 7: Generic Command Set for Communications for a DP letter ballot after a project editor has been nominated and the project editor has supplied the SC 13 secretariat a document in ISO style. SC 13 further resolves to authorize its secretariat to initiate a DIS letter ballot upon resolution of any DP letter ballot issues concerning 9318-7. The USA National Body will provide the necessary documentation to the SC 13 secretariat concerning the resolution of comments from the DP ballot. Resolution 9: SC 13 resolves to progress the Small Computer System Interface (SCSI-2) (DP 10288) as of 22-AUG-89 as a DP. SC 13 further resolves to authorize its secretariat to initiate a DIS letter ballot upon resolution of any DP letter ballot issues concerning DP 10288. The USA National Body will provide the necessary documentation to the SC 13 secretariat concerning the resolution of comments from the DP ballot. Resolution 10: SC 13 resolves to progress the (DP 9318-6) Intelligent Peripheral Interface (IPI) - Part 6: Enhanced IPI, physical level as a DP based upon a revision of the document along with additional cable impedance choices, and the completion of ISO style changes. SC 13 further resolves to authorize its secretariat to initiate a DIS letter ballot upon resolution of any DP letter ballot issues concerning 9318-6. The USA National Body will provide the necessary documentation to the SC 13 secretariat concerning the resolution of comments from the DP ballot. Resolution 11: SC 13 requests a new work item be assigned to provide a project 1 subdivision 1.9, for the processing of the High Speed Channel latest revision 29-AUG-89. SC 13 further resolves to authorize its secretariat to issue a DP letter ballot upon the approval of the project subdivision by JTC1. In addition, SC 13 authorizes its secretariat to initiate a DIS letter ballot upon resolution of any DP letter ballot issues concerning this proposal. The USA National Body will provide the necessary documentation to the SC 13 secretariat concerning the resolution of com- ments from the DP ballot. Resolution 12: SC 13 resolves to authorize its secretariat to issue a DP letter ballot for the Fibre Distributed Data Interface (FDDI) - Single mode fibre physical medium dependent (SMF-PMD), see document N 525 Rev 5.1, upon the JTC 1 endorsement of project 1.6. SC 13 further resolves to authorize its secretariat to initiate a DIS letter ballot upon resolution of any DP letter ballot issues concerning 9314-4. The USA National Body will provide the necessary documentation to the SC 13 secretariat concerning the resolution of comments from the DP ballot. Resolution 13: SC 13 resolves to encourage the USA National Body to submit documentation on the proposed Fibre Channel project to the SC 13 secretariat so that a new SC 13 work item proposal can be initiated. Resolution 14: SC 13 resolves to further the subdivide the IPI and SCSI projects to include: a) IPI enhancements; b) SCSI enhancements. SC 13 instructs its secretariat to submit a subdivision request to JTC1 for endorsement. The justification for the subdivisions will be provided by the USA National Body. Resolution 15: SC 13 resolves to inform the JTC1 Secretariat that the proposed new work item for "International Standardized Profiles for the Use of Fibre Distributed Data Interface (FDDI) as LAN and as a Backbone Network Between LANs of the 8802 Type" has been reviewed and discussed as instructed by the JTC1 Secretariat. SC 13 concluded that the new work item should be developed and that SC 13 should commence work immediately. SC 13 instructs its secretariat to forward the document "Disposition of comments on the new work item ballot on FDDI profiles (JTC1 N 327)" to the JTC1 Secretariat in response to JTC1 N 387. Resolution 16: SC 13 wishes to express its appreciation to the Danish Standards Association for hosting the 12th meeting of SC 13. Coincidentally, WG 2 of the future SC 25 was holding a meeting in the same hotel. Consequently a joint meeting was held that discussed the title and scope of SC 25 and the proposed WG 2 and WG 4. In the joint meeting held on 27-SEP-89 and 28-SEP-89 the following title and scope were agreed upon: The title of SC 25 is: "Interconnection of Information Technology Equipment". The scope of SC 25 is: "Standardization of interfaces, protocols and associated media for information technology equipment, principally in commercial and residential applications. In particular this excludes the standardization of telecommunication networks and interfaces to telecommunication networks." The title of SC 25 WG 2 is: "Physical Connections for Information Technology Equipment". The scope of SC 25 WG 2 is: "The standardization of physical connections for information technology equipment, such as fibre optic local area networks and peripheral interfaces, including the requirements for components and media". The title of SC 25 WG 4 is: "Interconnection of Computer Systems and Attached Equipment". The scope of SC 25 WG 4 is: "The standardization of interfaces and protocols for the interconnection of computers and computer peripheral equipment". 6.2 IT8 John Lohmeyer reported that Kip Smythe, the secretary of ASC IT8, had expressed his thanks to X3T9.2 for allocating two device type codes to their committee in SCSI-2 Rev 10b. In the same phone call, Kip also requested a slight change to the reference to ASC IT8. The parenthetical note in Table 7-17 will be clarified to read, "(Graphic Arts Pre-Press Devices)". The current note reads, "(Graphics Pre-Press Devices)". 6.3 SCSI-2 Common Access Method Committee Report Dal Allan reported. There have been two CAM meetings and one ATA meeting since the last X3T9.2 meeting. The ATA meeting reviewed the existing ATA document and decided to reverse the signal assignment on pins 21 and 27. Hopefully, an acceptable single implementation of PDIAG and DASP was reached. The next ATA meeting is Nov. 7, 1989 at Maxtor, 251 River Oaks Parkway, San Jose, CA. Contact Larry Lamers at 408-432- 4341 for more information. A draft CAM document has now been generated, based largely on material from an Adaptec internal document. In general there has been a positive response. This document will be reviewed at the next CAM meeting, which is Nov. 1, 1989 in Santa Ana, CA at the Embassy Suites Hotel. The following meeting is Dec. 7, 1989 during the San Diego Plenary week. 6.4 Fiber Channel Dal Allan reported. The Fiber Channel working group is still arguing about which coding scheme should be selected. This discussion was slated to continue during the X3T9.3 meeting on Tuesday and the Fiber Channel working group meeting on Wednesday. There are five contenders, with three that Dal felt were serious; clear channel with forward error correction, 8B/10B from IBM, and 8B/10B with forward error correction (DEC). A frame structure was presented by Joe Mathis of IBM which allowed the intermix of SCSI, HSC, and IPI frames via a link control field. The next fiber channel is at the Amdahl Education Center, Classroom B, 3120 Scotts Boulevard, Santa Clara, CA on November 2-3, 1989. Hotel rooms have not been blocked for this meeting. 6.5 X3B7 Report John Lohmeyer stated that the second day of the next working group meeting (October 31) had been designated to start with a review of the X3B7.1 draft document (X3T9.2/89-119) on testing SCSI disk drives. He had called Frank Meijers, the X3B7.1 chairman, and that Frank agreed to announce the October 31st meeting to the X3B7.1 members. Frank also informed John of the next meeting of X3B7.1. This meeting will be held November 6-7, 1989 in the Phoenix area. The hotel had not been determined at that time (Oct. 6). X3T9.2 members with an interest in drive testing methods are encouraged to attend. Normally, the SCSI issues are addressed on Monday morning. Anyone needing more details should call Frank Meijers at (602) 582-5503. 7. Review of Old Action Items 1. Larry Lamers and John Lohmeyer will prepare SCSI-2 Revision 10b. Complete. 2. John Lohmeyer will revise the list of fiber channel requirements from X3T9.2 and submit them to the fiber channel working group. Complete. 3. Dal Allan will clarify the ESDI document and send an electronic copy to John Lohmeyer. Complete. 4. John Lohmeyer will transmit SCSI-2 Revision 10b to X3T9 for further processing. Complete. 5. George Penokie will develop the two alternatives on 16-bit SCSI pin- outs for presentation at the Oklahoma City working group. More than complete -- the third alternative won. 8. Working Group and/or Project Status Reports 8.1 ESDI The official results on the X3 letter ballot approving the ESDI standard were: 34 Yes, 0 No, 2 Abstain, and 4 did not return their letter ballots. ESDI has been sent to the ANSI Board of Standards Review to verify that X3 correctly followed the process. Dal Allan is the technical editor. Final editing and publication should occur within a few months. This will be the first X3T9 standard to be published by ANSI in ISO style. 8.2 SCSI General Working Group (X3T9.2/89-120) Gene Milligan of IMPRIMIS hosted a working group meeting in Oklahoma City on September 6-7 with 27 people from 19 organizations present. The most controversial item addressed was Gary Stephens' document on preparing to move to alternate physical layers. This document was not a complete proposal, but rather a list of suggestions and criticisms about the current SCSI protocol. Gary was particularly critical of the message protocol. Gary received some astonished remarks and some encouragement. Apparently, there was enough encouragement to suit Gary. He announced plans to edit a more complete proposal from the SCSI-2 Rev 10b files. The working group agreed to place this item on the agenda for the Raleigh meeting (see 10.3). Another important decision made was to accept the "P3" signal assignments for the 16-bit single-cable SCSI proposal. These assignments place the A cable signals in the center of the P cable with the new signals added on both ends. This keeps the terminator power centered, but allows 8-bit devices to be placed on the P cable without crossing or folding signals. Kurt Chan brought up additional single-ended termination issues. There is a trade-off between optimal signal quality and maximum terminator power current requirements. Since most people had not studied Kurt's proposal, it was deferred to the Raleigh meeting (see item 9.2). 8.3 SCSI Transceiver Special Working Group (X3T9.2/89-120) This group met on Wednesday evening, September 6 to discuss possible new transceivers for SCSI that would improve signal quality and provide for high integration levels. The group principally focused on defining a new differential option that would dissipate less power so that more devices could be integrated into a single chip. The group reached consensus on several items: o that differential transceivers were required to meet the transfer rate, distance and noise immunity characteristics desired. o that trying to fit 16-bit SCSI into a 50-conductor cable is not of great interest. o that the ideal chip is one with integrated differential transceivers, little cost penalty, 16-bit SCSI, a plastic package, surface mount, and that does not require external heat sinks. o that an ECL-type chip could be done with todays technology although it would be expensive and run hot. o that a CMOS-type chip would be marginal with todays technology and would probably require a ceramic package. This item was discussed further under agenda item 9.4. The next meeting is scheduled for the afternoon of October 30 during the next working group meeting. 8.4 Report on Cable Impedance Special Working Group Meeting Bob Bellino reported on the cable impedance specification working group meeting, which was held Monday afternoon. In attendance were 35 people, with from 10 cable companies, 9 from connector companies, and 4 from systems integrators. This group focused on using round cables with high density connectors. They agreed that the outside diameter of the cable should not exceed 0.45 inch maximum. The individual wires should not exceed 0.035 inch maximum. They also reached agreement on the test method which should be specified. Bob Bellino will document the working group results in a separate document for the committee mailing. The working group asked whether the 90 ohm minimum characteristic impedance number is realistic. Cables with lower impedances have passed systems tests. Bob Bellino has arranged with several companies to do more testing to verify what the real requirements are. Chuck Mann reported on the cable impedance test procedure that was selected by the working group. They plan to measure the impedance in single-ended mode with a Time-Domain Reflectometer with 1 ns resolution. He said there is a known, fixed relationship between single-ended and differential impedance based on the cable geometry (single-ended impedance times 1.64 equals differential impedance). Wills Xu of C&M Corporation presented data on testing of four different type of cables with 0.035 wire outside diameter. The data illustrated the relationship between differential and single-ended, but did not seem to support the 1.64 ratio number. Several people suggested that perhaps it would be better to test in the intended mode rather than using a formula. This issue was not resolved. 9. Old Business 9.1 Cable Testing Results Kurt Chan presented results of his multiline cable evaluation. There are still several cables to be tested. The results will be published at that time. Test was done driving all 18 signals with a square wave using alternative 2 termination. The data needs to be correlated to impedance and across cable vendors to be useful. Dennis Springer of 3M presented information on a new cable type that 3M has built. This is a flat cable with 25 conductors on 0.050 inch centers and a pleated foil shield. The cable is designed singled-ended configuration; a differential version is possible, but has not yet been constructed. A combination of dielectrics and spacers is used to get the 93 ohm impedance with 16.3 pF/ft. Propagation delay is 1.52 ns/ft. The cable is 50 mil center and the odd pins are bussed inside the connector. The cable characteristics are similar to a bundle of coaxial cables, but the skew characteristics are better. Data rates can be increased by a factor of 10 over conventional cables. Bob Herron, in response to prodding by Gene Milligan, indicated that should such a cable be included in an X3T9 standard, 3M would comply with the ANSI patent policy. 9.2 Single-Ended Terminator Specification Issues (89-115R1) Kurt Chan presented data on the trade-offs between optimal signal quality using the alternative 2 terminator and meeting the maximum current specification on terminator power. SCSI-1 requires at least 800 mA be sourced on the single-ended terminator power line. SCSI-2 increases this specification to 900 mA. Kurt's document shows that under worst case conditions, these values can be exceeded. Nominal current requirements are below these numbers. There was some discussion over whether an implementors note should be added pointing out the possibility that worst case conditions (18 signals driven low, low VOL, worst case terminator resistor values, and high terminator power voltage) could exceed the terminator current requirements. The consensus was that the note was not necessary. 9.3 Single-cable 16-bit SCSI (X3T9.2/89-94 Rev 3) Most outstanding issues were resolved in revision 3 of this proposal. Steve Cornaby raised the question of intermixing 16-bit single connector (P cable) and 16- or 32-bit dual connector devices (that is, ones that use wide SCSI with an A cable and a B cable). Steve will work on a proposal. George Penokie suggested a method of agreeing on cable types that would add another byte to the WDTR message. This issue is related to the idea of sensing correct cabling that was abandoned in December 1988. The topic was remanded to the next working group meeting. 9.4 SCSI Transceivers Gary Murdock of National Semiconductor gave a brief presentation on an approach for putting differential transceivers on a single chip. The technique: o adds 11 pins o converts existing grounds to open-collector transceivers o requires a different termination scheme o might be somewhat compatible with existing single-ended devices (maybe) o still is limited to 6 meters at 5 mega-transfers per second o may need more powerful drivers for REQ and ACK signals o would require more terminator power o does not improve the impedance issues Gary said that the limited signal rise time would limit create a limit on cable lengths vs. transfer lengths. This issue was remanded to the Santa Ana working group. 10. New Business 10.1 SCSI-2 Public Review Comment (X3T9.2/89-106) In document 89-106, Ben Mattox of Robinson Nugent has requested that the X3 Secretariat consider adding a connector employing a "redundant ribbon contact design". Although Ben appears to be slightly confused about the standards process in that the X3 Secretariat does not have the authority to overturn a Technical Committee, it is apparent that he intended this document to be a public review comment against SCSI-2. John Lohmeyer turned the meeting over to Dal Allan so that he could make the following motion: John Lohmeyer moved and Bill Spence seconded that X3T9.2 accept the public review comment from Robinson Nugent to add a "redundant ribbon contact design" high-density connector. The motion failed 0 Yes, 37 No, and 3 Abstained. John Lohmeyer presented a draft letter for X3T9 to send to Robinson Nugent in response to their comment. He accepted an action item to submit the letter to X3T9 on Friday. 10.2 SCSI-3: Evolutionary or Revolutionary? There was heated discussion over the scope of items that should be covered under the SCSI-3 project and whether the name should be SCSI-3 or SCSI-2 Revision. Some people felt that the packetized SCSI activity was unnecessary and would fragment the market. Others felt that it was the only sane thing to do. No consensus was reached on what names should be used on these activities. The only consensus reached was that it is not necessary to make a decision at this point in time. When more data is available, we can better determine whether a second project proposal is necessary and what the project names should be. 10.3 Packetized SCSI (X3T9.2/89-36 R1) A brief summary of Gary Stephens' paper was given. It would use the two reserved information transfer phases to send packets of message+command data out or message+status data in. This information would be transferred in synchronous mode and would not be processed on a byte-by- byte basis. The intent is to minimize the number of turn around delays to process a command. While not a significant factor for short cables, turn around delays limit performance on long cables. Most of the changes suggested would be confined to Sections 4 and 5, plus some new ASC/ASCQs would be required. While some people felt that Gary's ideas represent a logical step in moving toward longer cable lengths and Fiber Channel, others were adamantly opposed. Gary announced plans to develop a more complete proposal for the Santa Ana working group meeting. 10.4 Review of new documents Signal Quality Issues on Differential (89-124) [Curry] John Lohmeyer said that Clark Curry is concerned that the differential driver and receiver alternative may be inadequately specified to insure good signal quality. In particular, high slew rates may cause reflections at points where the cable type changes or at the terminators. This is differential-mode noise, so it is not rejected by the differential receivers. John asked that anyone concerned with differential signal quality issues contact him so that a group can be formed to study what additional requirements should be defined for the differential alternative. Dal Allan recommended that Clark Curry review the driver specifications in the enhanced IPI to see if those specifications address his concerns. Mode Sense Page Code 00 (89-127) [Spence] When a target is sent a MODE SENSE command requesting the current values of page code 00h it is permissible, even encouraged by the wording in the document, that the target return CHECK CONDITION status. This is not particularly friendly to SCSI-1 initiators which were required to set this field to 00h. An implementors note will be added following Table 7-26 of Rev. 10b with the following words: "If a target receives a MODE SENSE command with a PC field of zero and a page code field of zero, compatibility with SCSI-1 initiators can be maintained by returning at least the mode parameter header and the block descriptor data instead of CHECK CONDITION status." 10.5 Agenda for the Santa Ana Working Group 1. Review of X3B7.1 Diagnostic Command Set (Tuesday a.m.) 2. SEARCH Command Modifications [Snively] 3. Alternate Physical Protocol Layer Preparation [Stephens] 4. Single-Cable 16-bit Wide SCSI [Penokie, Lohmeyer, Lamers] 5. Cable Configurations in Wide SCSI [Penokie, Cornaby] 6. Autosense [Snively] 7. Arbitration Fairness (89-61) [Penokie] 8. Arbitration Unfairness (89-65) [Buesing] 9. New SCSI Transceivers [Murdock] (Monday p.m.) 10. Signal Quality Issues on Differential (89-124) [Curry] 10.6 Errors found in SCSI-2 Rev 10b Mike Eneboe and Chuck Micalizzi have found two minor errors in SCSI-2 Rev 10b: 1. Section 5.6.22 on the TERMINATE I/O PROCESS message refers to an additional sense code of I/O PROCESS TERMINATED, but no such code is defined. Either a code should be defined or this ASC/ASCQ reference should be changed to NO ADDITIONAL SENSE INFORMATION. 2. Section 8.3.3.6 (Page 8-78) contains an error in the description of the TB bit. It should say, "The TB bit does not affect the action taken for recovered data." The "not" was accidentally left out. The committee agreed to make these corrections. Larry Lamers accepted an action items to select an appropriate ASC/ASCQ for I/O PROCESS TERMINATED and to correct the error in the TB bit description. 10.7 Should SCSI-2 replace SCSI-1? John Lohmeyer stated that Del Shoemaker had requested a reading from the committee members on whether SCSI-2 should replace SCSI-1 or not. Replacement is the normal procedure. If it does not replace it, then a new number is needed. The harm is the confusion in the marketplace if there are two SCSI standards. SCSI-1 also will come up for its five-year review next year. If both standards are simultaneously active then this committee is saying that designing to either standard is acceptable. Bill Spence moved and Gary Stephens seconded that X3.131-198x be permitted to replace X3.131-1986. The motion passed 27-1-0-0. 10.8 Call for Volunteers -- X3T9.2 Chairman and Vice Chairman (89-125) John Lohmeyer announced that the terms of the X3T9.2 chairman and vice chairman expire in February 1990. Any member of X3T9.2 may apply for these positions by sending a statement of management support and a statement of experience to Joanne M. Flanagan, Secretary of SMC, by January 5, 1990. These positions are appointed by the Secretariat Management Committee (SMC) for a three-year term. The current officers may apply again. Any member wishing further information concerning the duties of these positions should contact John Lohmeyer. 11. Review of Action Items 1. Bob Bellino will provide a report on cable impedance. 2. John Lohmeyer will submit the response to the public review comment #1 to X3T9 for approval. 3. John Lohmeyer will request that the X3 Secretariat to 3-hole punch the committee mailings. 4. Larry Lamers will select an appropriate ASC/ASCQ for I/O PROCESS TERMINATED. 5. Larry Lamers will correct the error in the TB bit description. 12. Meeting Schedule The next meeting of X3T9.2 will be December 4-5, 1989 at the Catamaran Resort Hotel (619) 488-1081 in San Diego, California hosted by NCR. Please mention X3T9/NCR when making reservations to receive the special room rate of $99.00 single and $114.00 double, plus tax. The cut-off date for reservations is November 6, 1989. The plenary meeting schedule is: Date Location Host -------------------- ------------------------ --------------------- February 19-20, 1990 Austin, TX Motorola April 23-24, 1990 St. Petersburg Beach, FL AMP June 18-19, 1990 Wichita, KS NCR August 20-21, 1990 Seattle, WA Boeing October 15-16, 1990 Valley Forge, PA UNISYS December 3-4, 1990 Southern CA ?? February 18-19, 1991 Dallas, TX EDS April 22-23, 1991 St. Petersburg, FL AMP June 17-18, 1991 Minneapolis, MN Stanatek August 19-20, 1991 Vancouver, BC tbd or Irvine, CA Western Digital October 14-15, 1991 Atlanta, GA AT&T December 9-10, 1991 Phoenix, AZ DEC Steve Cornaby moved and Jim McGrath seconded that the San Diego plenary meeting start at 1:00 p.m. instead of 9:00 a.m. The motion passed 17 Yes and 4 No. A cable impedance testing working group meeting will be held from 9:00 a.m. until 12:00 noon on December 4. 12.1 General Working Group Schedule for 1989 The next SCSI working group meeting was scheduled for October 30-31, 1989 in Santa Ana, CA hosted by Ken Post of Future Domain. The hotel is the Embassy Suites Hotel, 1325 East Dyer Road, Santa Ana, CA 92705 (714-241- 3800). The room rates are $89.00 single or double, plus tax. See X3T9.2/89-100 Rev 1 for more information. A SCSI CAM meeting will be held on November 1 in the same hotel. The 1990 Working Group Schedule is as follows: Date Location Host Comments ------------------- -------------- --------------- ---------------- Jan 8-12, 1990 San Jose, CA Sun Mar 5-9, 1990 Costa Mesa, CA Western Digital May 7-11, 1990 Chicago, IL AT&T {tentative} Jul 9-13, 1990 Sep 4-7, 1990 Oct 29-Nov 2, 1990 These week-long meetings are to be divided as follows: Monday SCSI CAM Committee Tuesday-Wednesday SCSI Working Group Thursday-Friday Fiber Channel 13. Adjournment The meeting was adjourned at 11:30 a.m. on Tuesday October 17. @