Approved Agenda X3T9.2 Meeting #75 April 25-26, 1988 St. Petersburg Beach, FL 1. Opening Remarks 2. Approval of Agenda 3. Attendance and Membership 3.1 Roll Call of Members in Jeopardy 4. Approval of Minutes - Feb. Meeting Phoenix (X3T9.2/88-020) 5. Document Distribution 5.1 New Document Distribution Procedures 6. Liaison Reports 6.1 ISO 7. Review of Old Action Items 8. Working Group and/or Project Status Reports 8.1 ESDI 8.2 Flexible Disk 8.3 SCSI General Working Group (X3T9.2/88-031) 8.3.1 ECA control bit in MODE SELECT/MODE SENSE 8.3.2 AEN enable/disable 8.3.3 MODE SELECT changes to nonchangeable parameters 8.3.4 Only report current values in MODE SENSE? 8.3.5 Residues on WRITE FILEMARKS commands 8.3.6 Additional Sense Codes (X3T9.2/88-032) 8.3.7 Wide Data Transfer Request (Allan) 8.3.8 Clarification of SDTR protocol 8.4 SIWG on embedded cache disk parameters 9. Old Business 9.1 BUSY issue (short vs. long?) (X3T9.2/87-192 - Semenak) 9.2 Review of SCSI-2 Draft Document (X3T9.2/86-109 Rev 4) 9.3 Pin assignments for new SCSI connectors 10. New Business 10.1 Proposed withdrawal of the Rigid Disk Interface (X3.101-1984) 10.2 Low-density connectors for Cable B 10.3 Review of new documents 10.4 Agenda for Minneapolis Working Group 10.5 Patent issue on the AMP high-density connector (X3T9.2/88-034) 10.6 Vendor Unique block address on CD-ROM 11. Review of Action Items 12. Meeting Schedule 12.1 1988 General Working Groups 13. Adjournment Approved Minutes X3T9.2 Meeting #75 April 25-26, 1988 St. Petersburg Beach, FL 1. Opening Remarks John Lohmeyer, the Chairman, called the meeting to order at 9:00 a.m., Monday April 25, 1988. He thanked Charles Brill of AMP for hosting the meeting in sunny Florida. He also thanked Classic Conferences for arranging the meeting. As is customary, each of the attendees introduced themselves. A copy of the X3T9.2 membership list was circulated for attendance and corrections. Copies of the draft agenda, the recent document register, and information on X3T9.2 were made available to all attendees. Application forms for membership and mailings were made available to the new attendees. 2. Approval of Agenda The draft agenda was approved with the following additions: 8.3.7 Wide Data Transfer Request (Allan) 8.3.8 Clarification of SDTR protocol 8.4 SIWG on embedded cache disk parameters 10.5 Patent issue on the AMP high-density connector (X3T9.2/88-034) 10.6 Vendor Unique block address on CD-ROM 3. Attendance and Membership Membership requirements were reviewed. The Chairman stated that three organizations had requested membership since the last meeting. Cinch connectors will be represented by William Cover and John Guennewig. DEST Corp. will be represented by Terence Chua and Jeff Seideman. JAE Electronics will be represented by Martin Pullam and Ken Tsukinari. New members at the meeting were Bart Raudebaugh of Cygnet and David Goodman of ITT Cannon. 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: Archive Corp., Data General Corp., EG&G WASC, Inc, ICL, and Intergraph Corp. The letters said that these organizations failed to attend two of the last three plenary meetings and that their membership would be terminated unless they attended the April plenary meeting. The Chairman stated that he had received a letter from Arnold Roccati saying that he would not be able to attend in the near future due to budgetary problems. X3T9.2 will miss Arnold's participation. Representatives were present from all of the organizations in jeopardy except EG&G WASC which will be changed to Observer status. 4. Approval of Minutes - Feb. Meeting Phoenix (X3T9.2/88-020) Two corrections were offered: In the last paragraph of 8.2.2, add a statement saying that the CHANGE DEFINITION command no longer has a DATA IN phase. In 10.4, indicate that the vote was a straw poll. The minutes of the Phoenix meeting were approved as corrected. revised minutes will be placed on the SCSI Bulletin Board, but will not be re- distributed. 5. Document Distribution The following new documents were distributed at the meeting: Document Doc Date Author Description of Document ------------- -------- --------------- --------------------------------------- X3T9.2/87-192 4/24/88 J. Semenak Proposal on returning additional BUSY Rev 2 information X3T9.2/88-37 4/18/88 B. Spence Synchronous ACK Edge Proposal X3T9.2/88-38 4/23/88 J. McGrath Rev 4 Issues - Sections 7 and 8 X3T9.2/88-39 4/18/88 B. Weber Proposed clarification to ESDI X3T9.2/88-41 4/25/88 D. Davies READ SILI Implementation Requirement X3T9.2/88-44 4/25/88 P. Boulay WORM Device Specific MODE SELECT Page X3T9.2/88-46 4/22/88 R. Liu MODE SELECT/SENSE Cache Control Page X3T9.2/88-47 4/22/88 R. Schlitzkus FORMAT TRACK Command for FLoppy Disk Drives X3T9.2/88-48 C. Brill Pin Assignments for High-Density Connectors X3T9.2/88-49 4/23/88 J. McGrath Proposed Read Caching Page Enclosure (4) is the current 1988 document register. 5.1 New Document Distribution Procedures The Chairman stated that the new document distribution system had been used for the last mailing. As insurance against major glitches he had distributed a redundant mailing to the Principal members only. Most members had received their mailings from the X3 Secretariat two weeks prior to the meeting. He thanked Del Shoemaker for his efforts in making the new document distribution system a success. There was one problem with the new mailing system. Almost universally, the mailings arrived in damaged envelopes. The Chairman's mailing was so badly damaged that the Postal Service wrapped it in plastic to keep the contents from falling out. He stated that this problem should be temporary because the copying service will do the future mailings, hopefully with stronger envelopes. The X3 Secretariat now maintains the database of who gets the committee mailings. The Chairman plans to continue maintaining a committee database for attendance purposes and for non-scheduled mailings. He sends change information to the X3 Secretariat bimonthly (shortly after each plenary meeting). Thus changes made on the attendance sheet are sent to the Secretariat. However, there is no guarantee how promptly the Secretariat processes this data. Therefore it is best to write to the Secretariat with any important changes. Please copy the Chairman on such correspondence. 6. Liaison Reports 6.1 ISO Gene Milligan gave the ISO liaison report. The ISO delegates need to establish positions on consideration of withdrawal of RDI, timing and method of EDSI submittal, submittal of IPI communications and submittal of IPI-2 tape. These positions must be established before the end of the June plenary meeting. Dal Allan provided the technical editor's response to the comments on DIS-9318 (IPI Physical), DIS 9319 (IPI-2 Disk), and DIS 9320 (IPI-3 Disk) documents. Francis Schrotter agreed to submit the SMD-E document to ISO for fast track publication without addressing the ISO/ANSI publication conflicts. The ISO document may be an exact copy of the ANSI document. SMD-E calls out references to prior publications which do not exist in international form. This issue has not been resolved. 7. Review of Old Action Items 7.1 Larry Lamers will reword section 5 to clarify that the initiator cannot send multiple groups of messages during a single MESSAGE OUT phase. Completed at the working group, see 88-009 R1. 7.2 Paul Boulay will review the archival vs. update issue for WORM optical media. Complete see 88-004. 7.3 Bob Snively will investigate compatibility issues of non-queued targets with queued initiators. Dropped, no issues. 7.4 Gary Stephens will propose revised wording in the retry counts and algorithms of REQUEST SENSE and MODE SELECT. Reassigned to Dan Davies. 7.5 John Lohmeyer will take the SCSI-3 project proposal (X3T9.2/87-193 Rev 1) to X3T9. Complete: X3T9 plans to take a meeting vote on this Project Proposal April 29. 7.6 Steve Goldman will research cables and pin assignments for new high- density connectors. Completed, see 88-048. 7.7 Charles Brill will provide the editors with the eight drawings needed for the high-density connector. Complete: The drawings were combined so that only four drawings were necessary. 7.8 Larry Lamers will move bit 0 to bit 2 in the WRITE SAME CDB. Bit 0 will be reserved. Carry over: WRITE SAME needs to be reviewed by the General Editor. 7.9 Dexter Anderson will develop proposed wording for resolving the message protocol issues. Complete -- See 88-009 R1. 8. Working Group and Project Status Reports 8.1 ESDI Due to delays in getting the ESDI document to the X3 Secretariat and delays in the X3 Secretariat's office, ESDI still has not started its first public review. Once the X3 Secretariat discovered the delay, it was rushed to SPARC where it passed its compliance review. It is now ready to go to ANSI to announce the public review in "Standards Action", a publication of ANSI. This publication is part of the "ANSI Reporter". John Lohmeyer spoke about an issue concerning how the intersector gap is spread before and after the Index/Sector pulse. Document 88-039 from Bret Weber of NCR describes the proposed change. This issue turned out to be somewhat controversial in that Bob Snively objected citing that the proposed change would create difficulties with those devices that support Count/Key/Data format. These devices negate Write Gate upon encountering the Index pulse and then assert Read Gate to read the first sector. Thus he felt the Write-to-Read time should remain defined as the ISG time after Index/Sector. John Lohmeyer agreed to discuss the issue with Bret Weber and to submit a public review comment if NCR still feels that the change is necessary. Gene Milligan voiced a concern that Appendix K in ESDI recommends using a phone plug connector that may be affected by the Stewart Stamping patents. He did not want to incur the risk of a patent problem over a recommended connector in an appendix. Gene Milligan moved that the editor be instructed to remove the last paragraph of Appendix K which references a preferred connector for synchronized spindles in the ESDI document prior to public review. Bob Mortensen seconded the motion. The motion passed unanimously. Another ESDI issue concerned the list of vendor ID codes and the statement saying that additions to the list can be made by contacting the document editor. This issue is similar to the SCSI-2 registration authority issue that has been pending at X3T9 for over a year. John Lohmeyer accepted an action item to bring up registration authority issue at X3T9 again. It was agreed that the list should be identified as the current list as of publication and that the appropriate person to contact for additions should be the X3T9 Chairman (until we receive X3T9 guidance). A motion to request X3T9 to substitute the draft ESDI dpANS with one that contains the following corrections and clarifications passed unanimously: Remove the Appendix K connector recommendation per the Milligan motion. Revise the vendor registration contact point from "the document editor" to "the X3T9 Chairman". Make typographical corrections which were identified. Dal Allan accepted an action item to prepare revision 2.A of ESDI and to send an original copy to John Lohmeyer. 8.2 Flexible Disk There was no report on this project. 8.3 SCSI General Working Group (X3T9.2/88-031) An SCSI-2 Working Group meeting was held March 7-9, 1988 in Newport Beach, CA with 30 attendees. The meeting was hosted by Jeff Stai of Western Digital. The minutes were distributed in the March mailing (X3T9.2/88-031). Dal Allan reported the highlights of the meeting. The following items were identified by the Working Group as requiring plenary discussion. 8.3.1 ECA control bit in MODE SELECT/MODE SENSE The working group noticed that the Extended Contingent Allegiance description in section 6 refers to a ECA enable bit in MODE SELECT/SENSE, but no such bit exists. The question was, "Do we drop the reference or add the bit?" The committee felt that the bit should be added. Jim Semenak accepted an action item to find a place for the bit. 8.3.2 AEN enable/disable An editorial review is needed for consistency of the AEN implementation requirements in document. The document should clarify that using UNIT ATTENTION condition is a viable alternative to AEN in most situations. Perhaps an implementors note is needed in the AEN description to explain why AEN is needed. Paul Boulay accepted an action item to develop wording. 8.3.3 MODE SELECT changes to non-changeable parameters Gene Milligan made a motion as follows: If the initiator attempts to send a value to a MODE parameter field that is not changeable (as reported by the target in a MODE SENSE command requesting changeable values) and that value is different from the value returned in a MODE SENSE command requesting current values, the target shall either: (1) ignore the new value and complete the command with GOOD status. (2) terminate the command with CHECK CONDITION status, set the sense key to ILLEGAL REQUEST, and set the additional sense code to INVALID FIELD IN PARAMETER LIST. Dan Davies moved and Larry Lamers seconded to amend the motion to add a third alternative as follows: (3) Terminate the command with a CHECK CONDITION status and set the sense key to RECOVERED ERROR. Both the amendment and the main motion failed. The net effect is that targets must report CHECK CONDITION status and ILLEGAL REQUEST sense key to attempts to change nonchangeable parameters. A straw vote was taken on whether targets should be permitted to alter any parameters if CHECK CONDITION status and ILLEGAL REQUEST SENSE key are returned on a MODE SELECT command. 4 were in favor of permitting the target to alter parameters in such a case and 22 were opposed. 8.3.4 Only report current values in MODE SENSE? It was suggested that reporting default/saved/changeable values in MODE SENSE is not especially valuable and leads to considerable difficulty in properly documenting the MODE SENSE command. The working group is soliciting input on whether SCSI-2 could just document the return of current values, leaving support of the other values open for compatibility with CCS. John Lohmeyer reported that most feedback received on the SCSI Bulletin Board was favorable on making this change, except for one message from Gerry Houlder. Gerry is strongly opposed to the change. A straw vote regarding what should be done with the description of Saved/Default/Changeable parameters was taken with the following results: 1. Move to appendix: 3 in favor 2. In body of document & optional: 14 in favor 3. In body of document & mandatory: 13 in favor 4. Delete altogether: 4 in favor A second straw vote was taken regarding whether implementation of Saved/Default/Changeable parameters should be optional or mandatory if the MODE SENSE command is implemented: Implementation optional: 13 in favor Implementation mandatory: 16 in favor 8.3.5 Residues on WRITE FILEMARKS commands Dan Davies elected to procrastinate on this issue until the next working group meeting. 8.3.6 Additional Sense Codes (X3T9.2/88-032) John Lohmeyer prepared a spreadsheet on the current additional sense codes in SCSI-2. This spreadsheet shows many conflicts between device types. The editors removed the additional sense codes from Rev 4 until the conflicts are resolved. The committee felt that the general direction should be to let the editors take their best shot at resolving these conflicts, cognizant of historical events. This topic was placed on the agenda for the next working group meeting. A discussion of the architectural considerations of sense keys and additional sense codes ensued. John Lohmeyer moved that sense key Fh "SOME SENSE", be deleted from the SCSI-2 document. Dan Davies seconded the motion. The motion passed, 25 in favor, 0 opposed. Bob Snively moved that the following wording be added to section 6.1: "The sense key, additional sense code, and additional sense code qualifier provide a hierarchy of information. [A description of this hierarchy will be provided by Steve Goldman.] The sense key is mandatory and presents generic information describing an error or unusual condition. An additional sense code is mandatory and if the condition is reported by the device, shall be provided with the specified code value. If the condition is not reported by the device, 00h is an acceptable additional sense code. The additional sense code qualifier is optional and refines the error description information provided in the additional sense code. If the condition is reported by the device the value must be as specified in this document. If the condition is not reported by the device, 00h is an acceptable additional sense code qualifier." Skip Jones seconded the motion. The motion passed, 26 in favor, 1 opposed. Steve Goldman stated that the original intent was for the sense key to vector the software to a recovery procedure, for the additional sense code to be an index into an error table that allowed a message to be displayed to the operator, and for the additional sense code qualifier to be vendor specific and not specified in the standard. Bill Homans in a late-in-the-day appeal for further architectural prostitution and logical disarray to protect his product's implementation persuaded the plenary to exchange the meaning of ASC-ASCQ 04-01 and 04-03 barring any objections stated at the next Working Group meeting. 8.3.7 Wide Data Transfer Request (Allan) The Working Group questioned why the negotiation process for Wide SCSI is not the same as for Synchronous SCSI. The working group deferred discussion on this issue to the plenary meeting so that Steve Goldman could participate -- He had defined the Wide SCSI negotiation procedure. Steve explained that the principal reason for the difference is that Wide SCSI only negotiates one value (the width) whereas synchronous SCSI negotiates two values (the transfer period and the REQ/ACK offset). The consensus was to add an implementors note to explain the differences. Steve Goldman accepted an action item to draft the note. 8.3.8 Clarification of SDTR protocol Gene Milligan questioned the clarity of item 10 of the Newport Beach working group meeting. In particular, what happens when going through reset? Bill Spence accepted an action item to clarify the wording (yet again). 8.4 SIWG on Embedded Disk Cache parameters A Special Interest Working Group (SIWG) meeting was held April 22 hosted by Jim McGrath of Quantum. This meeting was organized and chaired by Dal Allan, the Vice Chairman. The intent was to develop a proposal on a MODE page to control the relatively small caches that are being placed in embedded SCSI drives. Steve Goldman disagreed with the assumption that the control parameters for a small cache are different from those of a large cache. He expressed dismay that he had not been informed of the meeting and that he was now placed in the position of having to argue against the SIWG's proposal. A straw vote was taken on whether a Disk Cache Parameters page should be included in SCSI-2. 14 were in favor and 11 were opposed. Those people interested in this topic planned to work via telephone and FAX to further develop the proposal. Another SIWG meeting may be necessary to finish the proposal, but no definite date or location was set. 9. Old Business 9.1 BUSY issue (short vs. long?) (X3T9.2/87-192 - Semenak) Jim received several comments that he plans incorporate into a third revision of his proposal. The revision was to be reviewed at the next Working Group meeting. 9.2 Review of SCSI-2 Draft Document (X3T9.2/86-109 Rev 4) Larry Lamers briefly highlighted the changes made in Revision 4 of SCSI-2. A more detailed review was planned for the Working Group meeting. 9.3 Pin assignments in SCSI-2 (X3T9.2/88-048) The optimal pin assignments depend on whether 25 mil centerline ribbon cable can be built using 28 AWG wire. Enclosure (5) shows how such a cable would constructed. Enclosure (6) shows how to transition between low-density and high-density connectors. AMP had contacted two cable manufacturers who said that such cable can be built, but that the insulation would have to be thinner than on 50 mil cable. This would mean that the cable would not be able to obtain a 300 volt rating which 50 mil cable has. A new style number would be required. No one saw any problem with a low-voltage rating. Representatives from AMP and Honda indicated that there should not be any problems terminating such cable into their connectors. The committee requested that AMP provide information on the fan tool used to mate the 25 mil center cable on the 50 mil center connectors. A 3M representative stated the 25 mil flat cable using PVC insulation would have around 80 ohm impedance. A shield version would drop the impedance to around 45 ohms. Using teflon insulation would increase the impedance to around 90 ohms for non-shielded cable. Also cross-talk would increase if the rise times are short. AMP had prepared a document (88-048) showing the recommended pin to conductor assignments along with the signal assignments. Several corrections to the signal assignments were made during the course of discussion. Ed Gardner accepted an action item to revise this document per the discussion and to provide an electronic copy to John Lohmeyer. 10. New Business 10.1 Proposed withdrawal of the Rigid Disk Interface (X3.101-1984) John Lohmeyer reported that X3T9 intends to not re-affirm X3.101-1984, the Rigid Disk Interface (RDI), since this standard is not being widely used. Furthermore, X3T9 intends to withdraw this standard from consideration at ISO. James Whitworth of Priam indicated that they still ship a product with the RDI to one customer. No other usage of RDI was identified. Gene Milligan moved that X3T9.2 recommend that X3.101-1984 be withdrawn as a future ANSI standard and that RDI be withdrawn as a proposed ISO standard. Dal Allan seconded the motion. Motion passed 23 in favor, 1 opposed. 10.2 Low-density connectors for Cable B There was insufficient interest to pursue this alternative. 10.3 Review of new documents The authors of new documents were given time to introduce their proposals. Jim Semenak's proposal on returning additional BUSY information (87- 192 Rev 2) was discussed under agenda item 9.1. Jim plans to prepare revision 3 for the Working group meeting. Bill Spence's proposal on adding an implementors note concerning synchronous ACK edges (88-037) was accepted for Rev 5 of SCSI-2. Jim McGrath's comments of SCSI-2 Rev 4 (88-038) were remanded to the Working Group. Bret Weber's proposal on the intersector gap in ESDI (88-039) was discussed under agenda item 8.1. NCR will review this issue and possibly submit a public review comment on ESDI. Dan Davies' READ SILI proposal (88-041) was reviewed with the result that an implementors note will be included to warn that length information may not be available. Dan Davies accepted an action item to draft this implementors note. Paul Boulay's proposal on WORM Device-Specific MODE page (88-044) was remanded to the working group. This page would provide the necessary controls to deal with the archive vs. update issue. Robert Liu's proposal on Cache Control MODE page (88-046) was included in 88-049 at the embedded cache SIWG. Ron Schlitzkus introduced a proposal to add a FORMAT TRACK command (88-047) for flexible disks. Previous proposals to include such a command have been rejected because of difficulties in dealing with the track concept when all other addressing is in logical blocks. The proposal was deferred pending further review. Jim McGrath's proposal on a Read Caching page is covered under agenda item 8.4. 10.4 Agenda for Minneapolis Working Group The following agenda was drafted for the Minneapolis working group meeting. It consists of carry-over items from the last working group meeting plus new items recently submitted. Items are prioritized by SCSI-2 vs. SCSI-3. Agenda Items for SCSI-2 1. Additional Sense Code resolution 2. [] bracket removal 3. Review of S2R4 4. Rev 4 Issues - Sections 7 and 8 [88-38] (J. McGrath) 5. WORM Device Specific MODE SELECT Page [88-44] (P. Boulay) 6. Pin assignments for high density connector B 7. ACCESS LOG proposals (Spence) 8. Long vs. Short BUSY [87-192R3] (Semenak) 9. RECOVER BUFFERED DATA command for sequential access devices [88- 022] (Appleyard) 10. Residues on WRITE FILEMARKS commands (Davies) 11. MODE SELECT rewording on saving pages and nonchangeable parameters [88-027] (Houlder) 12. Proposed definition of caching [88-030] (McGrath) 13. Wide Data Transfer Request (Goldman) 14. Embedded Disk Cache parameters [88-049] (McGrath) Agenda Items for SCSI-3 50. SEND DIAGNOSTIC Pages [87-186] (Spence) 51. LOAD SKIP MASK command proposal [87-203] [87-217] (Floryance, McIntyre) 52. More that 8 devices on wide SCSI [87-206] (Harms) 53. Search Command modifications [88-002] (Stai) 54. Expanded RelAdr Bit [88-007] (Boulay) 10.5 Patent issue on the AMP high-density connector (X3T9.2/88-034) John Lohmeyer stated that he had a received a copy of a letter from Martin G. Raskin, an attorney for Stewart Stamping Corporation to the president of AMP, Incorporated. The letter was included in the mailing as X3T9.2/88-034. The letter claims that AMP infringes two of Stewart's patents (4,641,901 and 4,653,837) with its AMPLIMITE connectors which were selected for the SCSI-2 draft standard. The letter does not state whether Stewart believes that the other vendors of compatible parts also infringe their patents or whether it is necessary to infringe their patents in order to comply with the draft standard. A letter from AMP (document 88-045) was received by the committee stating that AMP did not infringe on the Stewart patents. After some discussion no action was taken. 10.6 Vendor Unique Block Address for CD-ROM There was considerable discussion over whether MSF addressing should be included in the CD-ROM command set. Larry Lamers defended the MSF addressing, especially for audio commands, because this is the fundamental addressing of the media. Others argued that this is comparable to including CHS addressing for Direct-Access devices. No closure was reached on this issue. It was agreed that section 13 should be re-named CD-ROM devices instead of Read-Only devices. Paul Boulay accepted an action item to become the editor of this section and revise some of the objectionable terminology. 11. Review of Action Items 11.1 Dan Davies will propose revised wording in the retry counts and algorithms of REQUEST SENSE and MODE SELECT. 11.2 Larry Lamers will review the changes made in the WRITE SAME CDB. He was previously assigned to move bit 0 to bit 2 in the WRITE SAME CDB and to reserve bit 0. In Rev 4, Bit 0 is RelAdr and Bit 2 is reserved. 11.3 Dal Allan will prepare ESDI rev 2.A and mail an original to John Lohmeyer. 11.4 John Lohmeyer will request X3T9 to substitute ESDI Rev 2.A for Rev 2.0 for the public review. 11.5 John Lohmeyer will seek X3T9 resolution on the registration authority issue. 11.6 Jim Semenak will find a home for the ECA control bit. 11.7 Paul Boulay to reword the AEN and unit attention paragraph. 11.8 Steve Goldman to draft an implementors note clarifying the differences between synchronous and wide negotiation procedures. 11.9 Ed Gardner will revise the pin assignments for wide SCSI to reflect the changes made at the St. Petersburg Beach meeting. 11.10 Paul Boulay will revise the CD-ROM section of SCSI-2. 11.11 Steve Goldman will provide a description of the sense key, additional sense code, and additional sense code qualifier hierarchy. 11.12 Bill Spence will further clarify the SDTR wording. 11.13 Ed Gardner will revise 88-048 (pin assignments) and send an electronic copy to John Lohmeyer. 11.14 Dan Davies will draft an implementors note warning that length information may not be available when using the SILI bit. 12. Meeting Schedule The next meeting of X3T9.2 will be June 20-21, 1988 at the Embassy Suites hotel in San Jose, CA (408) 942-0400 hosted by AMD. Please mention "X3T9/AMD" when making reservations to receive the special room rate of $99.00 plus tax. This rate includes a full cooked-to-order breakfast as well as two hours of complimentary cocktails each evening. The cut-off date for room reservations is May 30, 1988. The X3T9.2 plenary meeting schedule for the remainder of 1988 is: August 15-16, 1988 Colorado Springs, CO at the Antlers Hotel October 10-11, 1988 Boston, MA [Date Changed] December 5-6, 1988 San Diego, CA 12.1 1988 General Working Groups The proposed X3T9.2 general ad-hoc meeting schedule for 1988 is: May 9-11, 1988 Minneapolis, MN Gerald Houlder (see 88-019) July 11-13, 1988 Boise, ID Dave McIntyre August 29-31, 1988 San Jose, CA November 7-9, 1988 Austin, TX Bill Spence A fiber optic physical layer for IPI and SCSI study group meeting will be held June 2-3 at AMD. Please contact Jayshe Ullal at (800) 538- 8450 for details. 13. Adjournment The meeting was adjourned at 16:30, Tuesday, April 26, 1988.