X3T9.2/92-71 Date: March 18, 1992 To: X3T9.2 Membership From: Lawrence J. Lamers, X3T9.2 Secretary TEL: 408-432-3889 FAX: 408-943-1203 CS: 71540,2756 John B. Lohmeyer, X3T9.2 Chair Subject: March 16-18, 1992 X3T9.2 Working Group Meeting Minutes This meeting was split into three sessions, one Monday evening March 16 devoted to the topic of high-density ribbon-contact connectors (agenda item 9), one Tuesday morning March 17 devoted to queuing issues (agenda items 13 & 14), and one on Wednesday March 18 to cover the other agenda items. Dal Allan chaired the Monday evening session and John Lohmeyer chaired the other sessions. They both thanked Marilyn Martinez of Applied Micro Circuits Corp. for hosting the meeting. As is customary, the people attending 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 those attending. Information on X3T9.2 and Mailing Subscription Forms were made available. The final agenda was as follows: 1. Revised SCSI-3 project proposals 2. Serial Bus Protocol-P1394 (91-189R2) [Smyers] 3. FC-4S Protocol [Snively] 4. Generic Packetized Protocol (91-013R2) [Stephens] 5. SCSI-3 Architecture Model (91-045) [Monia] 6. ATA Extensions - DMA Timing [McGrath] 7. CAM comments resolution [Smyers, Youngwerth] 8. Enhancement of Sequential Access for Medium Changers (92-6) [Jones] 9. Alternate P Cable Connector for SCSI-3 10. Dual-port Issues [Houlder] 11. Request for new Additional Sense Codes (92-46) [Houlder] 12. SSA Update [John Best & Collin Butterworth] 13. Queuing Model [Penokie] (91-098R5) 14. TIB on SCSI-2 Queuing [Gallant] 15. Contact WG Report (Mosley) 16. Density Code Proposal (92-047R0) [Gardner] 17. PCMCIA/ATA Response 18. MI Proposal [Wilhelm] The following people attended the meeting: Name Status Organization Phone Number ------------------------- ------ ------------------------------ -------------- Mr. Robert C. Herron A 3M Company (512) 984-6807 Mr. Ken Wolfswinkel V 3M Company (512) 984-6719 Mr. Thomas Newman P Adaptec, Inc. (408) 945-8600 Mr. Al Wilhelm A Adaptec, Inc. (408) 945-2525 Mr. Sassan Teymouri A Advanced Micro Devices (408) 235-8616 Mr. Yun-Che Wang O Advanced Micro Devices (408) 987-2478 Mr. Charles Brill P AMP, Inc. (717) 561-6198 Mr. Bob Whiteman A AMP, Inc. (717) 780-7481 Mr. Bill Garver O AMP, Inc. (717) 986-3223 Mr. Ken Schreder S AMP, Inc. (717) 780-7699 Mr. J. Michael Evans V AMP, Inc. (717) 780-4248 Mr. Russell D. Moser V AMP, Inc. (717) 986-5022 Mr. Michael Wingard A Amphenol Interconnect (607) 786-4241 Mr. Scott Smyers P Apple Computer (408) 974-7057 Mr. Mike Eneboe A Apple Computer (408) 974-0615 Mr. Edward Hrvatin P Burndy Corp. (203) 852-8553 Mr. Dan Davies O Cipher Data Products, Inc. (619) 693-7750 Mr. Joe Chen P Cirrus Logic Inc. (510) 226-2101 Mr. John Geldman A Cirrus Logic Inc. (510) 226-2368 Mr. Michael Lazar P Connector Ind. Consulting Gr (914) 949-5450 Mr. Wayne Sanderson P Control Data Corp. (612) 482-2712 Mr. Greg McSorley O Data General Corp. (508) 870-8829 Mr. Charles Monia P Digital Equipment Corp. (508) 841-6757 Mr. Edward A. Gardner A Digital Equipment Corp. (719) 548-2247 Mr. Ralph Weber A Digital Equipment Corp. (603) 881-1497 Mr. John A. Gallant A Digital Equipment Corp. (603) 881-2472 Dr. William Ham A Digital Equipment Corp. (508) 841-2629 Mr. Skip Jones A Emulex Corp. (714) 668-5058 Mr. I. Dal Allan P ENDL (408) 867-6630 Mr. D. W. Spence A ENDL Associates (512) 255-0339 Mr. Stan Sharp P Foxconn International, Inc. (408) 749-1228 Mr. Nick Ladas A Foxconn International, Inc. (714) 256-1888 Mr. Joel Urban O Fujitsu Components of Amer. (408) 922-8928 Mr. Robert Liu P Fujitsu Computer Products,Am (408) 894-3790 Mr. Erwin Hauck P Future Domain (714) 253-0495 Mr. Jeffrey L. Williams P Hewlett Packard Co. (208) 323-5030 Mr. Kurt Chan A Hewlett Packard Co. (916) 785-5621 Mr. Kevin Jones O Hewlett Packard Co. 01 44 272 22051 Mr. Stewart Wyatt V Hewlett Packard Co. (208) 323-3594 Mr. Patrick Maher V Hirose Electric U.S.A. Mr. Howard Wang O Hitachi Computer Products (408) 986-9770 x207 Mr. Tom Kulesza O Honda Connector (708) 913-9566 Mr. George Penokie P IBM Corp. (507) 253-5208 Mr. Gary R. Stephens A IBM Corp. (602) 799-2246 Mr. Claude Mosley S IBM Corp. (507) 253-4064 Mr. Giles Frazier S IBM Corp. (512) 838-1802 Mr. Carl Zeitler V IBM Corp. (512) 838-1797 Mr. Jim Kopec V IBM Corp. (607) 757-1241 Mr. John S. Best V IBM Corp. (408) 927-1947 Mr. Thomas H. Newsom V IBM Corp. (407) 982-6447 Mr. Jay H. Neer V IBM Corp. (407) 982-5651 Mr. Tom Taetsch O Intellistor, Inc. (303) 682-6651 Mr. William D'Andrea S J.S.T. Corporation (714) 669-8035 Mr. David H. Shaff P JAE (305) 563-3484 Mr. Carl Salamon V JAE (714) 753-2600 Mr. Ronald Diotallevi V JST Corp. (708) 803-3300 Mr. Lansing Sloan V Lawrence Livermore Nat'l Lab (510) 422-4356 Mr. Lawrence J. Lamers P Maxtor Corp. (408) 432-3889 Mr. Bob Masterson P Methode Electronics, Inc. (303) 695-1333 Mr. Raymond C. Yule O Micropolis Corp. (818) 718-7803 Name Status Organization Phone Number ------------------------- ------ ------------------------------ -------------- Mr. Joe Dambach P Molex Inc. (708) 969-4550 Mr. Jim McGrath A Molex Inc. (708) 969-4550 Mr. David Bowen O Molex Inc. (708) 969-4747 Mr. Max Bassler O Molex Inc. (708) 969-4550 Mr. John Lopata V Molex Inc. (708) 969-4747 Mr. John Lohmeyer P NCR Corp. (316) 636-8703 Mr. David Steele S NCR Corp. (719) 596-5795 Mr. Gerald Houlder A Seagate Technology (612) 844-5869 Mr. Gene Milligan A Seagate Technology (405) 324-3070 Mr. Ram Battu S Seagate Technology, Inc. (408) 439-2625 Mr. Forrest Crowell P SGS-Thomson Microelectronics (714) 957-6018 Mr. Robert L. Simpson P Sony Corp. of America (408) 944-4348 Mr. Jim Smith V Tandem Computers (408) 285-9955 Mr. Todd Sprenkle V Tandem Computers (408) 285-6264 Mr. Alan Wetzel O Texas Instruments (214) 997-2370 Mr. Harvey Waltersdorf P Thomas & Betts (803) 676-2905 Mr. Tak Asami O Western Digital (714) 932-7621 Mr. Steve Drake O Yamaichi Electronics, Inc. (408) 452-0797 78 People Present Status Key: P - Principal Member O - Observer A - Alternate Member S,V - Visitor Results of Meeting 1. Revised SCSI-3 project proposals John Lohmeyer stated that several SCSI-3 projects need new or revised proposals. Needed are: P1394 Mapping (SBP), Fibre Channel Mapping (FC-4S), SCSI-3 Architecture Model (SAM), and one for each of the command sets. Dal Allan volunteered to draft the project proposals for review at the next plenary. 2. Serial Bus Protocol (P1394) [Smyers] Scott Smyers reviewed the latest changes to his document. The biggest change was the front cover, which was designed by his wife. He stated that Gene Milligan's comments were taken into account and that a better description of address space was done. He noted that the Unit ROM was now included, borrowed from IEEE 1212. The 64-bit SCSI Entity identifier address still needs correction to be 32 bits. There was debate on allowing a P1394 unique method of data transfers that did not use SCSI commands. This topic needs more discussion. 3. FC-4S Protocol [Snively] No activity. 4. Generic Packetized Protocol [Stephens] Gary had a new revision for the March mailing. No other activity. 5. SCSI-3 Architecture Model [Monia] Charles Monia presented his architectural model for the SAM layer of SCSI-3. The critique offered by the working group will be incorporated into the presentation and Rev 1. will be included in the May mailing. Charles stated his next objective is to develop a draft document framework. 6. ATA Extensions - DMA Timing [McGrath] A separate meeting was convened to address the DMA timing issue. An agreement was reached. Skip Jones will write up a report on the agreement. 7. CAM comments resolution [Smyers, Youngwerth] Dal Allan reported that CAM was now sanitized with generic OS names. Of the two outstanding comments, one is already addressed in SIM, the other has no solution within the current architecture. The plan is to include CAM 2.7 in next mailing for a forwarding vote at the X3T9.2 April Plenary meeting. 8. Enhancement of Sequential Access for Medium Changers (92-6) [Jones] Kevin Jones made a presentation of modifications to the sequential-access command set to support some medium exchange functions. He considers these to be a new class of devices having characteristics of tape drives and medium changers. These devices only deal with a limited number of media within a cartridge. The proposal included a bit in Inquiry Data to identify the device and allowing implementation of medium changer commands on a data device (i.e., the same logical unit number is used for both). There are several additional sense codes proposed. Kevin's proposal addressed only tape drive needs. The working group sentiment was that a general solution was needed, one that would also work with CD-ROM's in particular. Two specific issues were identified that need resolution: the PREVENT/ALLOW MEDIUM REMOVAL command needs to choose either cartridge or media; and the MOVE MEDIUM command meaning needs to be clarified. Kevin will generate a revision that incorporates the suggestions of the working group. 9. Alternate P Cable Connector for SCSI-3 Tom Newsom of IBM made a presentation on the Burndy 60-position ribbon connector. Ken Wolfswinkel of 3M made a presentation on their ribbon connector. Tom indicated a desire for a SCSI 68-pin unique connector to prevent usage in other applications. Dal Allan pointed out that this is a system integrator's prerogative and could not be requirement of the connector. The standard has no way of preventing a chosen connector from being used in other applications. Mike Lazar stated that EIA already has a project underway to standardize the IBM-Burndy connector. Dal Allan recapped the discussion stating that it was a product of different perspectives regarding decision points. The next meeting should decide criteria for making a judgement. Test results from an independent test lab to substantiate claims were requested. 10. Dual-port Issues [Houlder] Gerry Houlder reviewed how resets work for dual port implementations, specifically an interlocking system for resets. SCSI bus signal affects only the port it was received on, a BUS DEVICE RESET message affects all ports, and a BUS DEVICE RESET OTHER PORT to reset only the other port. The items discussed are in the latest SPI document. One note that needs to go into the SAM document is that on a reset the current mode parameters of the port not reset are adopted. 11. Request for new Additional Sense Codes (92-46) [Houlder] This document requests two new additional sense codes: 65h for voltage fault and 09h 04h for head select fault. The working group recommended acceptance and it will be added to the next plenary meeting agenda. 12. SSA Update [John Best & Collin Butterworth] John Best presented the latest in SSA. The presentation covered a SCSI mapping proposal (see 92-66) and a daisy chain proposal (see 92-67). 13. Queuing Model [Penokie] (91-098R5) George Penokie's latest proposal was very good for parallel SCSI but stumbled on serial bus usage of current I/O process. A definition of current I/O process independent of transport mechanism is needed. George promised yet another revision of the queuing model. 14. TIB on SCSI-2 Queuing [Gallant] John Gallant wants to develop a Technical Information Bulletin on SCSI-2 queuing in a multi-initiator environment. One point is the use of ECA to deal with error conditions. There are issues with CAM, packetized, and CAM auto- sense. John Gallant planned to develop a proposal for the mailing (92-75). 15. Contact WG Report (Mosley) Claude Mosley reported on the connector contact working group meeting which was held Monday afternoon. An agreement had been reached to develop one combined note on surface finish and performance level. The note reads as follows: The alternate connector system is to be a multi-wipe design with contact geometry and normal force to be sufficient to maintain a maximum change of 15 mohm from an initial resistance reading after the following sequence of tests: - initial contact resistance measurement - 50 mating /unmating cycles - contact resistance - perform flowing mixed gas test per IEEE 1156.1 on mated connectors - measure contact resistance and compare to initial measurement - resistance to be measured using a four-point dry circuit method directly across mated contacts The radius on the blade is to be 0.040 +/- 0.010 inches. 16. Density Code Proposal (92-047R0) [Gardner] Ed Gardner reported that a new reference document for tape media code 17h existed. A new denser media code was requested (18h) for 42500bpi tape. He also requested that the next few codes be set aside for compatible media that is expected before the forwarding of SCSI-3. 17. PCMCIA/ATA Response A letter was drafted and faxed to Mark Cummings, Tony Wutka, and John Reimer expressing the concerns of the ATA Extensions Working Group about the PCMCIA/ATA proposal (see 92-60). 18. MI Proposal [Wilhelm] Al Wilhelm made a proposal to add medium interchange features to SCSI. The proposal include adding a medium interchange bit to the inquiry data and a new mode page to define the translation used by the device. His aim was towards removable media, but Gene Milligan pointed out that the same problem needs to be solved for non-removable media. It was stated that Syquest has already solved the translation problem in CAM for removable media in a DOS-specific environment. It was also pointed out that future versions of OS's will deal with logical block addressing, and obviate the need for an MI bit. Gene Milligan suggested that by adopting a solution to the translation problem this movement may be hindered. Al stated that neither of these totally satisfy the existing market need. He indicated that a vendor-specific solution existed and if the working group was not interested he would drop the proposal. The consensus was that he should revise the proposal incorporating the suggestions made and bring to the next plenary meeting for a vote. Larry Lamers pointed out that an enabling bit is needed in the proposed mode page to maintain backward compatibility. Without such a bit, disk drive vendors would feel considerable pressure to operate with non-MI drivers anyway, defeating the MI strategy.