Accredited Standards Committee X3, Information Processing Systems Doc. No.: X3T9.2/92-222 R0 Date: November 13, 1992 Project: 791-D Ref. Doc.: X3T9.2/90-143 Reply to: L. Lamers To: Membership of X3T9.2 From: Lawrence J. Lamers, Secretary X3T9.2 I. Dal Allan Vice-Chair X3T9.2 Subject: Minutes of ATA November 9, '92 Working Group Meeting ______________________________________________________________________________ Agenda 1. Opening Remarks 2. Attendance and Membership 3. Approval of Agenda 4. DMA Timing Issue 5. Opcode 0h 6. Door Lock-Unlock Command 7. ATA Extenstions 7.1 Define Mode 1 and 2 for Multi-word DMA (Shah) 7.2 Extending Definition of PIO (Shah) 7.3 REST/RESUME Commands 7.4 FORMAT TRACK LBA 8. Meeting Schedule 9. Adjournment Results of Meeting 1. Opening Remarks Dal Allan, the Chair, called the meeting to order at 2:00 pm, Monday November 9, 1992. He thanked Rich Taborek of Amdahl for hosting the meeting. As is customary, the people attending introduced themselves. A copy of the attendance list was circulated for attendance and corrections. It was stated that the meeting had been authorized by X3T9.2 and would be conducted under the X3 rules. Ad hoc meetings take no final actions, but prepare recommendations for approval by the X3T9.2 task group. The voting rules for the meeting are those of the parent committee, X3T9.2. These rules are: one vote per company; and any participating company member may vote. The minutes of this meeting will be posted to the SCSI BBS and the SCSI Reflector and will be included in the next committee mailing. 2. Attendance and Membership Attendance at working group meetings does not count toward minimum attendance requirements for X3T9.2 membership. Working group meetings are open to any person or company to attend and to express their opinion on the subjects being discussed. The following people attended the meeting: Name Status Organization Phone Number ------------------------- ------ ------------------------------ -------------- Mr. Norm Harris P Adaptec, Inc. (408) 945-8600 x2230 Mr. Scott Smyers P Apple Computer (408) 974-7057 Mr. John Geldman A Cirrus Logic Inc. (510) 226-2368 Mr. Dale Smith V Data Transit (408) 365-1461 Mr. Charles Monia P Digital Equipment Corp. (508) 841-6757 Mr. I. Dal Allan P ENDL (408) 867-6630 Mr. Jim Luttrull A Fujitsu Computer Products,Am (408) 432-1300 Mr. Jeffrey L. Williams P Hewlett Packard Co. (208) 323-5030 Mr. Levi Lebo V Hewlett Packard Co. (208) 323-4652 Mr. George Penokie P IBM Corp. (507) 253-5208 Mr. Tom Taetsch O Intellistor, Inc. (303) 682-6651 Mr. Rick Paul V Judd Wire, Inc. (619) 744-7720 Mr. Lawrence J. Lamers P Maxtor Corp. (408) 432-3889 Mr. Ron Roberts V Maxtor Corp. (408) 432-3875 Mr. Robbie Shergill P National Semiconductor (408) 721-7959 Mr. John Lohmeyer P NCR Corp. (719) 596-5795 x362 Mr. Stephen F. Heil P Panasonic Technologies, Inc (201) 348-7064 Mr. Hale Landis A Seagate Technology (408) 439-2443 Mr. Gene Milligan A Seagate Technology (405) 324-3070 Mr. Stephen G. Finch P Silicon Systems, Inc. (714) 573-6855 Mr. Shishir Shah A Western Digital (714) 932-7235 Mr. Tom Hanan O Western Digital (714) 932-7472 Status Key: P - Principal Member A - Alternate Member L - Liaison Member O - Observer S,V - Visitor 3. Approval of Agenda The draft agenda was approved. 4. DMA Timing Issue George Penokie stated that the tJ value in revision 3.2 is not the same as was in the proposal accepted. The tJ references two different edges, trailing edge in burst mode, leading edge in non-burst mode. In multi-word transfers the tJ label will be changed to tM and the description will be changed to "DIOR-/DIOW- assert to DMACK hold". John Geldman stated an objection to the value of zero for tM. He requested that the value be 10 ns. John Geldman will arrange a get together of the silicon folks to arrive at the correct value. 5. Opcode 0h This opcode was requested by Adaptec, but was not included in the prior revision. It has been included in revision 3.2. 6. Door Lock-Unlock Command Hal Landis stated that the one sentence description for the Lock-Unlock command implies that a door is needed to comply with the document. There is no distinction between removable media and a removable devices. Dal Allan suggested that an annex be developed explaining the lock-unlock command. Tom Hanan volunteered to develop this annex and mail it to the principals and alternates. 7. ATA Extensions 7.1 Define Mode 1 and 2 for Multi-word DMA (Shah) 7.2 Extending Definition of PIO (Shah) There is a need for smaller granularity on cylce time to get higher performance when using PIO in local bus implementations. A 30 ns granularity was suggested. 7.3 REST/RESUME Commands Zenith not present. 7.4 FORMAT TRACK LBA Larry Lamers apologized for not having copies of the revised proposal available. 8. Meeting Schedule The next meeting of the ATA Working Group is planned for January 11, 1993 from 2:00 pm to 8:00 pm at the Sheraton Hotel (408-745-6000) in Sunnyvale, CA. 9. Adjournment The meeting was adjourned at 4:00 p.m. on Monday November 9, 1992.