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- Date: March 13, 1989
- To: X3T9.2 Membership
- From: Larry Lamers, X3T9.2 Recording Secretary
- John Lohmeyer, X3T9.2 Chairman
- Subject: March 1989 SCSI Working Group Minutes
-
- Jim McGrath of Quantum hosted a working group meeting March 6, 1989
- in Milpitas, CA at the Sheraton Inn. The working group thanks Jim and Quantum
- for hosting this short meeting. The final agenda was:
-
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- SCSI-2 Items
-
- 1. Review of the SCSI-2 Revision 7a changes. [Larry Lamers]
-
- 2. Proposed new Sequential-Access Density Code. (89-43) [Bill Duran]
-
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- SCSI-3 Items
-
- 50. 87-186 SEND DIAGNOSTIC Pages [Bill Spence]
- 51. 87-203 & 87-217 LOAD SKIP MASK command proposal [Greg Floryance, Dave
- McIntyre]
- 52. 87-206 More that 8 devices on wide SCSI [David Harms]
- 53. 88-002 Search Command modifications [Jeff Stai]
- 54. 88-007 Expanded RelAdr Bit Definition [Paul Boulay]
- 55. 88-69R1, 88-92, & 88-100 Autoconfiguration SSWG [Jerry Marazas, Paul
- Nitza, Jim McGrath, Paul Boulay]
- 56. 88-127 Error Handling Action Codes [George Penokie]
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- The following people attended the meeting:
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- Name Status Organization
- ------------------------------ ------ ------------------------------
- Mr. Robert N. Snively P Adaptec, Inc.
- Mr. Al Wilhelm A Adaptec, Inc.
- Mr. Scott Smyers A Advanced Micro Devices
- Mr. Jerry Katzung A Apple Computer
- Mr. Cristopher J. Rhea A AT&T
- Mr. Dan Davies P Cipher Data Products, Inc.
- Mr. Paul Hanmann A Emulex Corp.
- Mr. I. Dal Allan P ENDL
- Mr. Curtis Mulder A Exabyte Corp.
- Mr. Robert Liu P Fujitsu America, Inc.
- Mr. Bob Pentecost P Hewlett Packard Co.
- Mr. Mike Peper V Hewlett Packard Co.
- Mr. Minoru Yoshida V Hitachi Computer Products
- Mr. George Penokie P IBM Corp.
- Mr. David A. Buesing O IBM Corp.
- Mr. Gene Milligan P IMPRIMIS/CDC
- Mr. William Homans P LMS-TSD
- Mr. Lawrence J. Lamers P Maxtor Corp.
- Mr. John Lohmeyer P NCR Corp.
- Mr. Paul Nitza P OTL Engineering
- Mr. James McGrath P Quantum Corp.
- Mr. Mark Sherwood A Scientific Micro Systems
- Mr. D. W. Spence P Texas Instruments
- Mr. Jeff Stai P Western Digital
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- 24 attendees
-
- Status Key: P - Principal A - Alternate O - Observer V - Visitor
-
- Only one new document was distributed at the meeting:
-
- Document Doc Date Author Description of Document
- ------------- -------- --------------- ---------------------------------------
- X3T9.2/89-43 B. Duran Proposed Sequential-Access Density Code
-
- General Discussion
-
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- Mr. Mori's comments on ISO 9316 (SCSI) were discussed briefly. It was felt
- that they only pertain to the ISO document and not to SCSI-2.
-
- Gene Milligan, as X3T9 International Representative, raised the question of
- who should be appointed the ISO technical editor. Since Harvey Rosenfeld has
- hinted that ANSI will accept ISO style, Larry Lamers tentatively agreed to
- edit both documents. At the last SC-13 meeting, the USA delegation promised
- to submit a copy of SCSI-2 to ISO upon its acceptance by X3T9.
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- Agenda Items for SCSI-2
-
- 1. Review of the SCSI-2 Revision 7a changes. [Larry Lamers]
-
- At the plenary meeting in Austin quite a few last-minute changes were
- made to revision 7 which was then forwarded to X3T9 as revision 8. In
- order to insure these changes were correctly incorporated, the general
- editor prepared revision 7a, which was distributed at the meeting.
-
- Larry Lamers led a detailed review of the changes that he had made. This
- resulted in several editorial improvements to the document and a couple
- corrections where Larry had misunderstood what the plenary wanted.
-
- Larry Lamers brought up a question of how much protocol support is
- required of a target that responds to a single-bit selection. The SCSI-2
- document does not permit an initiator to do a single initiator selection,
- but it does permit a target to respond for compatibility with SCSI-1
- initiators. The document is mute on further issues such as is the target
- required to honor the ATN signal or DISCONNECT messages? After some
- discussion, the working group felt that a target which responds to SCSI-1
- protocol (single-initiator option) should be bound by the SCSI-1 rules.
- A clarification was added to the implementors note saying that the target
- may respond as an SCSI-1 device.
-
- In order to avoid a null model in section 7, John Lohmeyer prepared a
- simple model for section 7.1. This model contains no requirements. He
- proposed that, later, the technical editor should consider moving parts
- of section 6 into the general device model.
-
- There are still some issues concerning ASCs and ASCQs. The last plenary
- did not want to merge these two fields because they did not want an
- implication that the ASCQ must be supported. But there are a few cases
- in the document where the document seems to require an ASC to be set to
- some value that has a nonzero ASCQ. The editors tried to conform to what
- they perceived was the group's intentions, but there may still be issues
- here. One place where they resolved an apparent conflict was in section
- 13 (CD-ROM) where a statement was changed so that a non-zero ASCQ would
- not be required.
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- A correction was made in Section 9 where some the the values for the
- density code corresponding to QIC 320 were in error.
-
- 2. Proposed new Sequential-Access Density Code. (89-43) [Bill Duran]
-
- Bill Duran of Exabyte presented a document requesting a new tape density
- code. While most people favored adding this new density code, it was
- felt that the working group did not have the authority to make such a
- change after the document was forwarded. There is not yet an X3B5
- reference document. This item was put into the queue for consideration
- when X3T9.2 next receives the document.
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- SCSI-3 items
-
- Near the end of Monday, the working group decided to adjourn yet that day
- rather jumping into the SCSI-3 project in depth. Each item in the queue for
- SCSI-3 was reviewed briefly to determine whether it was still appropriate to
- be considered and to outline the important features of each proposal.
-
- 50. 87-186 SEND DIAGNOSTIC Pages [Bill Spence]
-
- Bill Spence suggested that this item will turn into a more ambitious
- proposal to include ways to diagnostic functions in SCSI devices. He
- mentioned that X3B7 is working on something that relates to testing
- intelligent devices.
-
- 51. 87-203 & 87-217 LOAD SKIP MASK command proposal [Greg Floryance, Dave
- McIntyre]
-
- The LOAD SKIP MASK command (a.k.a. scatter/gather) functions are still
- desirable.
-
- 52. 87-206 More that 8 devices on wide SCSI [David Harms]
-
- More than eight devices on wide SCSI remains on the list. The three-bit
- encoded ID fields in some commands (COPY, third-party reservations) could
- pose some compatibility problems.
-
- 53. 88-002 Search Command modifications [Jeff Stai]
-
- Modifications of SEARCH commands is tied with the scatter/gather
- functions and is still an appropriate topic.
-
- 54. 88-007 Expanded RelAdr Bit Definition [Paul Boulay]
-
- John Lohmeyer outlined the history of why the RelAdr bit is restricted.
- He suggested that no decision should be made on the appropriateness of
- this topic since Paul Boulay was not present.
-
- 55. 88-69R1, 88-92, & 88-100 Autoconfiguration SSWG [Jerry Marazas, Paul
- Nitza, Jim McGrath, Paul Boulay]
-
- Jerry Marazas was not present to indicate whether he was still interested
- in this topic. Many of the other proposals had been submitted because
- people did not like the 60-pin proposal from IBM. If IBM drops their
- proposal, these competing proposals may also be dropped.
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- 56. 88-127 Error Handling Action Codes [George Penokie]
-
- George Penokie indicated that IBM is still interested in this topic.
-
- Proposed Additions to the SCSI-3 Queue
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- * Autosense [Nitza]
- * Apple request for Data DAT device type
- * Documentation Layering [Gary Stephens]
- * Single-cable 16-bit wide SCSI
- * Alternate physical layers (e.g., fiber optics)
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