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Approved Agenda -- X3T9.2 Meeting #78 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 Milpitas, CA (X3T9.2/88-096) 5. Document Distribution 6. Liaison Reports 6.1 ISO 7. Review of Old Action Items 8. Working Group and/or Project Status Reports 8.1 ESDI 8.1.1 ESDI Public Review Comment Resolution 8.2 Flexible Disk 8.3 SCSI General Working Group (X3T9.2/88-109) 8.4 Fiber Optic Physical Layer Study Group 8.5 Autoconfiguration SSWG 8.6 Transmission Line SSWG 8.7 Medium Changers SSWG 8.8 Hierarchical Filemarks SSWG (X3T9.2/88-107) 9. Old Business 9.1 SCSI Device Connector Orientation (X3T9.2/88-80 Rev 2) 9.2 Number of Terminator Power Lines for SCSI-2 (X3T9.2/88-48R1,-77,-87) 9.3 Schedule for SCSI-2 9.4 Review of SCSI-2 Draft Document (X3T9.2/86-109 Rev 5) 9.4.1 12-byte LOG SELECT/SENSE (X3T9.2/88-95) 9.4.2 Rotational Position Locking 9.4.3 Device Models 9.4.4 B Cable Data Transfer Requirements (X3T9.2/88-108) 9.4.5 Generic Error Recovery Page (X3T9.2/88-103 Rev 1) 9.4.6 What if the initiator fails to negate ATN per Table 5-2? 9.5 Connector Proposals 9.5.1 AMP (X3T9.2/88-133,134) 9.5.2 Stewart Stamping Connector Proposal (X3T9.2/88-67,-111,-128) 9.5.3 Plating & maximum envelope -- Amphenol 9.6 Format Progress Reporting 10. New Business 10.1 Review of new documents 10.2 Agenda for Austin Working Group 10.3 Alternative S.E. terminator 10.4 Terminate indicate 11. Review of Action Items 12. Meeting Schedule 12.1 General Working Group Schedule for 1989 13. Adjournment Minutes -- X3T9.2 Meeting #78 1. Opening Remarks John Lohmeyer, the Chairman, called the meeting to order at 9:00 a.m., Monday October 10, 1988. He thanked Mary Jane Strohl (in absentia) of Apollo for hosting the meeting and he also thanked Classic Conferences for arranging the meeting. He apologized in advance for Dal Allan's, Larry Lamers', and his lack of alertness due to having just returned from the SC-13 meeting in Tokyo. As is customary, the attendees introduced themselves. A copy of the X3T9.2 membership list was circulated for attendance and corrections. Copies of the draft agenda and the recent document register were made available to all attendees. Information on X3T9.2 and Document Distribution Application forms were made available for new attendees. 2. Approval of Agenda The draft agenda was approved with the following additions: 3. Attendance and Membership The membership requirements were reviewed. The Chairman stated that since the last meeting several changes had occurred in the voting membership: Masayuki Yokoyama has replaced Sergio Fonesca as Sony's Alternate; Anil Gupta has replaced Ken D'Souza as Western Digital's Alternate; and Martin Pullam and M. Perugini of Winchester Electronics have become voting members of the committee. Martin Pullam was a Principal member of the committee previously when he worked for JAE. At the meeting, Jim Harper of Optotech was reinstated as a Principal member. John Lohmeyer said he was sorry if he had frightened anyone at the last meeting by announcing those organizations which had not paid their service fees. After some analysis, the X3 Secretariat had determined that their membership lists were only about 25% accurate. They were re-entering the membership lists from the committee lists to bill the correct people in the organizations. No one will be terminated for non-payment until the Secretariat's lists are straightened out. 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: A.C.T./Shugart, Advanced Micro Devices, Congruent Software, Inc., Datacopy Corp., Interphase Corp., Iomega Corp., MAI Basic Four, Mitsubishi Electronics America, Northern Telecom, Inc., Seagate Technology, Storage Technology Corp., Sun Microsystems, Inc., 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. The letters to Michael O'Donnell of Storage Technology and Moshe Segal of AMD were returned marked that they are no longer at their addresses. Representatives were present from all of the organizations except A.C.T./Shugart, and MAI Basic Four. These organizations were changed to Observer status. 4. Approval of Minutes - August Meeting Milpitas, CA (X3T9.2/88-096) The minutes were approved as written. 5. Document Distribution The Chairman stated that the X3 Secretariat had once again processed the mailing promptly, but that due to the large size, they had to authorize overtime for the copy service in order to meet the two-week rule. Kate McMillan has requested that the next mailing be split into two mailings: the first would include SCSI-2 Rev 6 and the second would include new documents from the Austin working group meeting. The second mailing may not arrive two weeks prior to the December meeting due to the short time between meetings. The idea is to give the secretariat more lead time on the bulky part of the mailing. John Lohmeyer requested that all documents for the next mailing be sent to him by October 28. The following new documents were distributed at the meeting: Document Doc Date Author Description of Document ------------- -------- --------------- --------------------------------------- X3T9.2/88-65 10/10/88 P. Boulay Asynchronous Event Notification Rev 3 Revision X3T9.2/88-95 9/30/88 B. Pentecost LOG SELECT and LOG SENSE commands for Rev 1 Large Logs X3T9.2/88-107 10/3/88 B. Homans Hierarchical Filemarks (Setmarks) Rev 1 X3T9.2/88-108 10/6/88 R. Snively B Cable Data Transfer Requirements Rev 1 X3T9.2/88-116 J. Stai Disable function for "IGNORE WIDE RESIDUE" message X3T9.2/88-118 9/27/88 J. Lohmeyer Interpretation of the Connector Standing Rules X3T9.2/88-119 9/29/88 B. Weber NCR Public Review comment on dpANS BSR X3.170-198X (ESDI 2.A) X3T9.2/88-120 10/9/88 B. Spence Data Pointer X3T9.2/88-121 10/10/88 P. Boulay Disconnect Control via Mode Select X3T9.2/88-122 9/20/88 S. Jones Change Definition vs. Inquiry Inconsistency X3T9.2/88-123 9/30/88 D. Allan Common Access Method Committee X3T9.2/88-124 10/6/88 S. Cornaby Progress Reporting X3T9.2/88-125 10/8/88 B. Spence Notice re the November X3T9.2 Working Group Meeting X3T9.2/88-126 10/5/88 T. Wicklund Comments on SCSI-2, Revision 5 document X3T9.2/88-127 10/10/88 G. Penokie Error Handling Action Codes X3T9.2/88-128 10/10/88 D. Hatch Stewart Connector presentation Enclosure (4) is the current 1988 document register. 6. Liaison Reports 6.1 ISO The ISO/JTC 1/SC 13 meeting the week of 3 October in Tokyo was attended by delegates from Denmark, Germany, F.R., Japan, Sweden, United Kingdom, U.S.A., and the U.S.S.R. In addition there was liaison representation from ISO/IEC JTC 1/SC 6, ISO Central secretariat Geneva, and the ISO/IEC JTC 1 (Vice Chairman). During the work, SC 13 passed the following resolutions: (1) terminate consideration of the LDDI under Project 1 in favor of the newer alternative interface FDDI; (2) progress DIS 9314-1 on FDDI PHY to the Central Secretariat for final processing with applicable editorial changes (including elimination of the Foreword), the elimination of references to contacting the secretariat for further information, a change of Note 2 on page 7 to "This primitive is not used by ISO 9314-2 FDDI MAC.", and correction of the typographical error in Figure 4 on page 29 to label Input(I) as (30a) rather than (31a). (3) initiate an amendment to IS 9314-1 on FDDI PHY to delete the unused service primitive. (4) progress DIS 9314-2 on FDDI MAC to the Central Secretariat for final processing with applicable editorial changes (including elimination of the Foreword and moving Normative References 6 and 7 to an informational reference at the end of the standard), the elimination of references to contacting the secretariat for further information, a change of Note 2 on page 12 to "This PHY to MAC service primitive is not used by this standard.", changing note 4 on page 24 to "This clause is the subject of a future amendment.", changing note 5 on page 40 to "The list of Valid Frame criteria may be the subject of a future amendment.", and by the editorial clarification of the last paragraph on page 47 of replacing "restored" in two places by "restored to the set condition". (5) initiate an amendment to IS 9314-2 on FDDI MAC to change the addressing to 48 bits mandatory and 16 bits optional and to delete the unused service primitive. (6) progress DIS 9315 on Flexible Disk Drive Interface to the Central Secretariat for final processing and to correct the dimensional errors in the board edge dimensions. (7) terminate consideration of DP 9323 on Rigid Disk Interface under project 10.2 in favor of the newer alternative interfaces ESDI and IPI-2 disk. (8) progress DIS 9316 on SCSI to the Central Secretariat for final processing. (9) progress DIS 9317 on Streaming Cartridge and Cassette Tape Drives to the Central Secretariat for final processing. (10) progress DIS 9318 on Intelligent Peripheral Interface (IPI) - Physical Level to the Central Secretariat for final processing. (11) progress DIS 9319 on Intelligent Peripheral Interface (IPI) - Device specific command set for magnetic disk drives to the Central Secretariat for final processing. (12) progress DIS 9320 on Intelligent Peripheral Interface (IPI) - Device generic command set for magnetic and optical disk drives to the Central Secretariat for final processing. (13) progress DIS 9321 on Intelligent Peripheral Interface (IPI) - Device generic command set for magnetic tape to the Central Secretariat for final processing, providing that the upcoming DIS letter ballot passes without the need for substantial change. (14) progress the Intelligent Peripheral Interface (IPI) - Device specific command set for magnetic tape (N468) as a DIS. (15) progress the Enhanced Small Device Interface (ESDI) (N469) as a DIS. (16) progress the enhanced Small Computer System Interface (SCSI-2) as a DP after its approval by X3T9. (17) progress the Enhanced Intelligent Peripheral Interface (IPI) - Physical Level as DP 9318-6 after its approval by X3T9. (18) renumber the family of IPI documents replacing the separate numbers with 9318 followed by a sequential part number as new IPI documents are assigned. (19) forward Tokyo-9, "International Standardized Profiles for the use of FDDI as LAN and as backbone network between LANs of the 8802 type." proposed New Work Item on ISPs for FDDI, to the JTC 1 secretariat for letter ballot with assignment to SC 13. (20) close liaison with SC 83 and nominates Prof. Popovic to become liaison officer to SC 83. (21) Thanks to Japan for hosting the meeting. Chairman's note: The complete minutes of the ISO/IEC JTC1/SC13 meeting are available on the SCSI Bulletin Board (316-636-8700) in File Area 1. 7. Review of Old Action Items 1. Dan Davies will propose revised wording in the retry counts and algorithms of REQUEST SENSE and MODE SELECT. Complete (see 88-103R1). 2. Harvey Waltersdorf will provide the UL, CSA, VDE listings and the electrical characteristics of 25-mil centerline, 28-AWG ribbon cables. This item was mostly completed at the August meeting. No further work was done on it. It will be dropped from action item list. 3. Bob Mortensen will take another pass at the wording on Rotational Position Locking and will submit it to the working group for further consideration. Carried over. 4. Jerry Marazas will modify the connector orientation drawing to be more generic and will attempt to get it into a suitable electronic format. Jerry was not present. This action item was dropped as a result of the failed motion during 9.1. 5. John Lohmeyer will revise section 5 to include 88-91 along with the modifications developed in the August meeting. Carried over. 8. Working Group and/or Project Status Reports 8.1 ESDI 8.1.1 ESDI Public Review Comment Resolution The first public review period on ESDI (BSR X3.170-198X) ended October 3, 1988. Two formal comments were received, one from GSA and one from NCR. There were also several informal comments were received by the task group: 1) Registration authority procedure for vendor codes (88-61). 2) Revised vendor codes (88-73). 3) Correction to spindle motor control (88-74). 4) Tom Wicklund's comments (88-89). 5) Ciprico/NCR proposal on ESDI timing parameters (88-113). Dal Allan reported that the comment from GSA was subsequently withdrawn after he sent Mr. Rinehuls a complete copy of the ESDI document. The resolution of these comments was assigned to an ad hoc group which met Monday evening (see X3T9.2/88-131). All comments were resolved by the ad hoc group. Dal Allan will revise the ESDI document and will send it to John Lohmeyer for the next X3T9.2 mailing and to Bill Burr for the next X3T9 mailing. It is expected that there will be a forwarding motion on ESDI at the December meeting. 8.2 Flexible Disk Gene Milligan reported for Gary Robinson. The edge connector dimensions for width do not add up correctly. This may be a tolerance issue. Gary Robinson will address this issue and it will be fixed as a editorial item in the document. Gene suggested that the edge-connector drawings should be checked in other X3T9 documents which may have copied the Flexible Disk drawings. 8.3 SCSI General Working Group (X3T9.2/88-109) A working group meeting was held August 29-31 in San Jose, CA. Jim McGrath of Quantum hosted the meeting. Dal Allan chaired the meeting and Larry Lamers kept the minutes. There were 45 attendees. Dal Allan reported on the significant actions taken by the working group. Please refer to X3T9.2/88-109 for the meeting minutes (September mailing). The main topic discussed was the transmission line problems. The alternatives were not attractive. However the issue will not disappear, and the problem is aggravated with the higher transfer rates and the fact that cables are typically of a lower impedance than was assumed in the SCSI standard. 8.4 Fiber Optic Physical Layer Study Group A fiber optic study group meeting was held September 26-27 at Hewlett Packard in San Jose, CA. Dal Allan chaired the meeting. Dal gave a brief report on the meeting and minutes (see X3T9.2/88-129) will be included in the next mailings from X3T9.2 and X3T9.3. The fiber optic physical layer project proposal was approved by X3 36 Yes to 1 No. The no vote was from AMP, who wanted connector selection responsibility to go to EIA because they felt that X3T9 could not handle connector issues expeditiously. X3T9.3's response is that they do not want to be dependent on another group's schedule for connector selection. A set of items was developed as a requirements document model for the group. Three levels of performance and cost were discussed by the group. The initial study activity has been completed and now the group will begin the proposal stage. The next fiber optic physical layer working group meeting is scheduled for December 1-2, 1988 in Cupertino. Jim Smith at Tandem Computers (408- 996-6545) is arranging the meeting. In response to questions from committee members on where this activity is going with respect to SCSI, Dal Allan responded that the fiber channel is an X3T9.3 activity. He requested more active representation from the SCSI group. He expected that SCSI-3 could reference the fiber channel as an alternative physical configuration. Chairman's note: X3T9.2 will probably have to develop some documentation to describe how to use the fiber channel physical layer with SCSI. This may be part of the SCSI-3 project or we may elect to submit a separate project proposal for this activity. 8.5 Autoconfiguration SSWG Paul Boulay led this SSWG which met at various times during the San Jose working group meeting. Jerry Marazas gave an overview of revision 2 of his proposal (88-69R2) and time was spent on developing Jim McGrath's counter-proposal. The SSWG asked Jerry and Jim to identify any changes that should be made in SCSI-2 so that their techniques, if included in SCSI-3, would have optimal compatibility with SCSI-2 devices. Paul Boulay gave a brief report of the SSWG activities. Jim McGrath completed his action item in document X3T9.2/88-115. 8.6 Transmission Line SSWG (X3T9.2/88-109) This SSWG met in San Jose during the general working group meeting. Jeff Stai led the group. Since Jeff was unable to attend the Boston meeting, Dal Allan reported on the SSWG. The SSWG developed three recommendations on what should/could be done about single-ended signal quality: 1) All cable used in the system should be 90-132 ohms. 2) Reduce the maximum cable length from six meters. 3) Provide advice on cable lengths in implementations. Other more-drastic solutions such as changing the drivers/receivers and termination circuits were deemed unacceptable for SCSI-2 but may be considered under the SCSI-3 project. Jim Schuessler presented an idea on a method to automatically cut the power to the terminator if the bus is plugged into an old device. This would prevent any of the old drivers from being damaged. The proposal does require the re-definition of a signal to terminator sense in the interface. If any old device is connected to the bus then all new devices would cut power to their terminators. The proposed termination circuit would dissipate about 3 watts and thus there is a size consideration for fitting into a terminator block. 8.7 Medium Changers SSWG Paul Boulay led this SSWG and gave a brief report to the plenary. He is also the editor of this section. There still is work to be done on this section. The most significant change so far has been to the READ ELEMENT STATUS command. The plan is to complete the work and have a revised document for the Austin working group meeting. 8.8 Hierarchical Filemarks SSWG (X3T9.2/88-107R1) The group has changed the name of this concept to "Setmarks" and has developed wording for SCSI-2 Rev 6. The idea is to create filemark-like blocks that have different levels or priorities. Setmarks used within a file would would have lower priority than those used to delimit a file. A group of related files could be delimited with still higher priority setmarks. Mike Mattei, substituting for Bill Homans, gave a report on the SSWG. The SSWG developed X3T9.2/88-107 Rev. 1 which was accepted by the plenary for inclusion into SCSI-2 R6. 9. Old Business 9.1 SCSI Device Connector Orientation (X3T9.2/88-80 Rev 2) Jerry Marazas was not present. Bill Spence nominated Gene Milligan to undertake the action item to provide a drawing of the correct connector orientation. Gene developed three figures during the course of the meeting. Tuesday morning, Gene Milligan presented the figures on connector orientation with pin 1 in the upper right-hand corner of the connector when viewing the device from the rear of the enclosure. Figure 1 included a suggestion that the power connector be further to the right of the A cable connector. Figure 2 included a suggestion on where the B cable connector should be located (between the A cable connector and the power connector with pin 1 in the upper right). Figure 3 omitted both the power and the B cable connectors. Dal Allan recommended that the figures also include a suggestion that when mounting such a device vertically, it be rotated so that pin 1 would be oriented up. Gene Milligan moved and Bob Snively seconded that X3T9.2 accept the first two figures presented by Gene Milligan showing preferred connector orientations but without the power connectors, (including the vertical recommendation), and that X3T9.2 direct the editor to include similar figures with appropriate wording to indicate that this is a suggestion only, not a requirement. The motion failed, 12 in favor and 20 opposed. 9.2 Number of Terminator Power Lines for SCSI-2 (X3T9.2/88-48R1,-77,-87) The discussion turned to reserving some of the lines in SCSI-2, to allow for future flexibility. There was a general agreement to do this as long as the standard did specify a particular future use. The big problem was what to do with the "reserved" signals; are they open, grounded, passively terminated, actively terminated, or some combination of these. John Morse moved and Steve Goldman seconded that four lines in the A cable connector be reserved for future use. "Reserved" was to be defined by the conclusion of this plenary meeting. Bill Spence moved and Bob Snively seconded that the motion be amended to not change any signal definition for the A cable from that specified in SCSI-2 R5. The motion to amend failed, 12 in favor and 16 opposed. The main motion carried, 14 in favor and 12 opposed. John Morse moved and John Lohmeyer seconded that pins 23, 24, 27, and 28 in the low-density A cable connector and 12, 14, 37, and 39 in the high- density A cable connector be those "reserved" lines. The motion carried, 9 in favor and 6 opposed. John Morse moved and John Lohmeyer seconded that "reserved" be defined as open at the devices and ground at the terminator. Jim McGrath moved and Bob Snively seconded that the motion be amended so that "reserved" be defined as either open or ground (with open recommended) at the device and ground at the terminator. The motion to amend carried, 23 in favor and 2 opposed. The amended motion carried, 26 in favor and 4 opposed. The plenary directed the editor to incorporate the necessary wording into SCSI-2 R6. 9.3 Schedule for SCSI-2 John Lohmeyer reported that he and Larry Lamers intend to meet the last week of October to prepare revision 6 of SCSI-2. This document is to be included in the November mailing. Bill Spence had volunteered to make a few copies for the attendees of the November working group meeting so that they can thoroughly review the document. If the changes are not too extensive, then a revision 7 would be prepared from the marked-up copy of revision 6 for forwarding at the December plenary meeting. Of course, any significant changes or unresolved issues would slip this schedule. Gene Milligan moved and Peter Johansson seconded that upon the termination of the October plenary meeting any new proposal not be considered until SCSI-2 is forwarded. The motion carried, 28 in favor and 4 opposed. 9.4 Review of SCSI-2 Draft Document (X3T9.2/86-109 Rev 5) John Lohmeyer stated that Ben Driscoll has resigned his position as editor of the scanner section of SCSI-2 since he has left Datacopy. Greg DeRosa who replaces Ben as the Datacopy Alternate has volunteered to be the new scanner section editor. John asked for opinions on whether this section still required a section editor or should it be assigned to the general editor, Larry Lamers. Larry recommended that the scanner model and a glossary should be completed by the section editor prior to assigning the section to him. Larry Lamers will contact Greg DeRosa concerning the development of a model and a glossary for scanner devices and his willingness to be the scanner section editor. George Penokie made several (mostly editorial) comments on SCSI-2 R5. These comments were reviewed by the plenary meeting attendees and the section editors will make the appropriate corrections. 9.4.1 12-byte LOG SELECT/SENSE (X3T9.2/88-95, 88-132) The two options recommended by the working group were put to a straw vote: a) twelve-byte command descriptor blocks (3 in favor, 11 opposed) b) use ten-byte commands with the allocation length in blocks (13 in favor, 4 opposed) During the meeting, Bob Pentecost developed yet another proposal for doing log parameters in chunks using 10-byte commands (see 88-132). This document with a few additional changes (88-132 R1) was accepted for inclusion in SCSI-2 R6. During the discussion it was noticed that page 7-31 paragraph 3 in SCSI-2 R5 references a section that does not exist and should contain a description of time ordering of log entries. Jim McGrath said that the section had existed in the original proposal but may have been lost as it was edited into the draft document. Jim Semenak was assigned an action item to correct this problem. 9.4.2 Rotational Position Locking As Bob Mortensen and Larry Lamers had not met yet, this item was carried over. 9.4.3 Device Models The Chairman advised the committee that the following device models are still missing and, ideally, should be completed before the document is forwarded. The following is the list of assignments for model development: Section 8: Direct Access Devices - Greg Fry Section 9: Sequential Access Devices - complete Section 10: Printer Devices - John Lohmeyer Section 11: Processor Devices - Jeff Stai Section 12: Write-Once Devices - unassigned Section 13: CD-ROM Devices - complete Section 14: Scanner Devices - Larry Lamers to contact Greg DeRosa Section 15: Optical Memory Devices - Larry Lamers Section 16: Medium Changer Devices - Paul Boulay Section 17: Communication Devices - Bob Snively At the August working group meeting, Dal Allan had suggested that the Direct-Access Device model quite possibly could be developed from a model for rotating storage devices that Bill Burr had written 18 to 24 months previously. John Lohmeyer said he thought this model contained mostly device-level information and may have to be edited extensively before it could be used for SCSI-2. He accepted an action item to obtain this model from Bill Burr. 9.4.4 B Cable Data Transfer Requirements (X3T9.2/88-108 R1) Bob Snively's document (88-108 R1) was accepted as modified in the meeting for incorporation into SCSI-2 R6. 9.4.5 Generic Error Recovery Page (X3T9.2/88-103 Rev 1) Since Dan Davies had to leave before this item was discussed, it was remanded to the working group. 9.4.6 What if the initiator fails to negate ATN per Table 5-2? In revision 4, Table 5-2 was revised to specify that the initiator should negate the ATN signal prior to asserting the ACK signal on the last byte of several messages. The was intended to reduce the total number of messages that must be processed with a single MESSAGE OUT phase. Unfortunately, rev 4 did not say what a target should do if the initiator failed to meet this requirement. George Penokie noticed this problem and suggested that the standard should really specify the correct target response. John Lohmeyer added a statement to revision 5 on page 5-10 saying the target shall go to the BUS FREE phase (unexpected BUS FREE) if the initiator fails to negate ATN before asserting ACK on the last byte of one of these messages. He also included a [] note soliciting any objections. The San Jose working group felt that this change was sufficiently technical to warrant discussion and a formal vote at the plenary meeting. John Lohmeyer moved and Bill Spence seconded that the change made to the third paragraph of 5.2.1 be accepted as modified and that the [] note be deleted in SCSI-2 rev 6. The motion carried, 19 in favor and 0 opposed. 9.5 Connector Proposals 9.5.1 AMP (X3T9.2/88-133,134) Bob Whiteman gave a presentation on the SCSI cable impedance characteristics based on computer simulation and an actual hardware configuration. Bud Reyner, a transmission line specialist for AMP, was present to respond to questions from the committee. See documents X3T9.2/88-133 and -134. 9.5.2 Stewart Stamping Connector Proposal (X3T9.2/88-67,-111,-128) David Hatch gave a presentation on nonshielded high-density connectors which can be used with 50-mil centerline flat ribbon cable. The ribbon cable is split into two equal width pieces and the cables are terminated one directly on top of the other with the conductors offset by 25-mils. See document X3T9.2/88-136. Dal Allan moved and Steve Goldman seconded that volunteer organizations initiate testing of the cabling and connector alternatives and that the existing connector and pinout designations be retained unless significant technical problems are uncovered. The motion carried, 25 in favor and 11 opposed. The following organizations volunteered to participate in the testing: 3M, Adaptec, AMP, DEC, and Technology Forums. 9.5.3 Plating & maximum envelope for connectors -- Amphenol Mike Wingard of Amphenol requested a recommendation from the committee on what the desired connector envelope is for terminators and cable harness assemblies and how thick the plating should be. Dal Allan recalled that the guideline for connector selection had been 1500 matings minimum. This may be excessive for some applications. There was a short discussion on the topic with the general conclusion that there is no single right answer. 9.6 Format Progress Reporting (X3T9.2/88-124) [Steve Cornaby] Steve Cornaby stated that the Format Progress reporting feature was not clear and that it was too specific to just one problem. He recommended that this kind of information be made available for other long-duration commands as well. He further suggested that the information be reported in terms of the expected maximum time to complete the command rather than the percentage completion. Several others expressed opinions that Steve had missed the point of what IBM had wished to accomplish through the Format Progress Reporting. No consensus was reached and this item was remanded to the working group for further consideration. In the meantime, the sense key specific bytes in REQUEST SENSE that relate to format progress reporting should be revised to make it clear that these bytes are only valid following the completion of a FORMAT UNIT command with an Immediate bit of one. This action item was assigned to Jim Semenak. 10. New Business 10.1 Review of new documents Asynchronous Event Notification Revision (X3T9.2/88-065 R3) [Paul Boulay] This document was accepted for incorporation into SCSI-2 R6. WDTR Disable Residue function (X3T9.2/88-116) [Jeff Stai] The committee requested that this proposal be re-written as a mode parameter instead of a modifier bit of the WDTR message. The revised proposal was remanded to the working group. Data Pointer (X3T9.2/88-120) [Bill Spence] Peter Johansson moved and Dal Allan seconded that X3T9.2/88-120 be accepted for inclusion in SCSI-2 R6. The motion carried, 10 in favor, 3 opposed. Disconnect Control via MODE SELECT (X3T9.2/88-121 R0) [Paul Boulay] This document was accepted for incorporation into SCSI-2 R6. CHANGE DEFINITION vs. INQUIRY Inconsistency (X3T9.2/88-122) [Skip Jones] This document was remanded to the working group since Skip was not present to defend it. Error Handling Action Codes (X3T9.2/88-127) [G. Penokie] The committee agreed to assign this as a SCSI-3 work item. 10.2 Agenda for Austin Working Group The following agenda items were identified. If there is any extra time available, then SCSI-3 items will be considered. 1. Detailed Review of SCSI-2 Revision 6 in preparation for forwarding. 2. Format Progress Reporting (X3T9.2/88-124) [Steve Cornaby] 3. Rotational Position Locking [Bob Mortensen] 4. Medium Changers [Paul Boulay] 5. Generic Error Recovery Page (X3T9.2/88-103 Rev 1) [Dan Davies] 6. WDTR Disable Residue function (X3T9.2/88-116) [Jeff Stai] 7. CHANGE DEFINITION vs. INQUIRY Inconsistency (X3T9.2/88-122) [Skip Jones] 8. TERMINATE IMMEDIATE and REPORT BLOCKS TRANSFERRED messages [Steve Goldman] 10.3 Alternative Single-ended terminator [Christian Mollard] Christian Mollard suggested changing the single-ended termination resistors to 180/390 ohm values and using a special 1N5818 Schottky diode to achieve a better impedance match without requiring any changes to the drivers or receivers. The committee was receptive to this idea and asked Christian to develop a complete proposal. See enclosure (5). 10.4 Terminate Immediate Steve Goldman gave a presentation on the need for a TERMINATE IMMEDIATE message when implementing large caches using SCSI direct-access devices. The TERMINATE IMMEDIATE message would request the target to terminate the current command (presumably a read or write command) at the end of the current logical block. The target would return a REPORT BLOCKS TRANSFERRED message indicating the actual number of logical blocks transferred. Drive-level interfaces such as ESDI have this capability and Steve suggested that the addition of this capability would permit usage of SCSI drives in certain caching applications. Some alternative approaches (such as command queuing) were also briefly discussed. Steve Goldman moved and Tom Wicklund seconded that X3T9.2 consider adding a TERMINATE IMMEDIATE message and a REPORT BLOCKS TRANSFERRED message to SCSI-2. The motion carried, 19 in favor and 0 opposed. This topic is to be considered at the November working group meeting. 11. Review of Action Items 1. Bob Mortensen will take another pass at the wording on Rotational Position Locking and will submit it to the working group for further consideration. 2. John Lohmeyer will revise section 5 to include 88-91 along with the modifications developed in the August meeting. 3. Gary Robinson will address the edge connector dimension issue in the Flexible Disk standard (X3.80R-198X). 4. Jim Semenak will correct page 7-31 paragraph 3 in SCSI-2 R5 which references a section that does not exist and should contain a description of time ordering of log entries. 5. Jim Semenak will clarify the format-in-progress part of the sense-key specific bytes in the REQUEST SENSE data wording so that it is clear that it only applies to the FORMAT UNIT command with the Immediate bit set to one. 6. Christian Mollard will develop a complete proposal on changing the termination network for single-ended systems. 7. Dal Allan will revise the ESDI dpANS per the results of the ad hoc meeting (see 88-131) and he will forward master copies to John Lohmeyer for the X3T9.2 mailing and to Bill Burr for the X3T9 mailing. 8. Larry Lamers will contact Greg DeRosa concerning the development of a model and a glossary for scanner devices and his willingness to be the scanner section editor. 9. John Lohmeyer will obtain Bill Burr's model on rotating mass storage devices for possible use in developing the SCSI-2 model for direct- access devices. 12. Meeting Schedule The next meeting of X3T9.2 will be December 5-6, 1988 at the Hyatt Islandia in San Diego (619-224-1234) hosted by Cipher. Please mention "X3T9/Cipher" when making reservations to receive the special room rate of $80.00 single or double occupancy. The cut-off date for room reservations is November 21, 1988. The X3T9.2 plenary meeting schedule for 1989 is: Date Location Host -------------------- -------------------------- -------- February 20-21, 1989 Austin, TX Motorola April 24-25, 1989 St. Petersburg Beach, FL AMP June 19-20, 1989 San Jose, CA AMD August 21-22, 1989 Denver DEC October 16-17, 1989 Research Triangle Park, NC IBM December 4-5, 1989 San Diego, CA NCR 12.1 General Working Group Schedule for 1989 The X3T9.2 general ad-hoc meeting schedule for the remainder of 1988 and 1989 is: Date Location Host -------------------- ------------ -------------------------------- November 7-9, 1988 Austin, TX Bill Spence January 9-11, 1989 Irvine, CA Jeff Stai March 6-8, 1989 San Jose, CA Jim McGrath {tentative} May 8-10, 1989 Wichita, KS John Lohmeyer {tentative} July 10-12, 1989 ? ? {tentative date} September 6-8, 1989 ? ? {tentative date} Oct 30 - Nov 1, 1989 ? ? {tentative date} 13. Adjournment The meeting was adjourned at 5:11 p.m. on Tuesday, October 11, 1988.