Minutes of X3T10 SCC Study Group Meeting - July 16, 1996

Lohmeyer, John JLOHMEYE at cossymwest.co.symbios.com
Tue Jul 23 12:24:00 PDT 1996

* From the SCSI Reflector, posted by:

Accredited Standards Committee
X3, Information Processing Systems
                                                 Doc. No.: X3T10/96-206r0
                                                     Date: July, 16 1996
                                                Ref. Doc.:
                                                 Reply to: G. Penokie

To:       Membership of X3T10

From:     George Penokie / Ralph Weber

Subject:  Minutes of X3T10 SCC Study Group Meeting - July 16, 1996


1. Opening Remarks
2. Attendance and Membership
3. Approval of Agenda
4. Report on status of the SCC-2 project proposal
5. SCC-2 proposals (96-164r1)
6. Simplification of SCAL configurations (96-196r0)
7. Action Items
8. Meeting Schedule
9. Adjournment

Results of Meeting

1.      Opening Remarks

George Penokie convened the meeting at 9:00 am, Tuesday, July 16, 1996.
He thanked John Lohmeyer of Symbios Logic for hosting the meeting.

This is a joint meeting of the X3T10 SCSI Controller Commands working
group, the RAB Host Interface working group, and the DMTF disk subgroup,
mass storage working committee.  The purpose of the group is to deal with
interface issues related to using RAIDs.  The study group will assess the
issues and then formulate a strategy for dealing with them.

As is customary, the people attending introduced themselves.  A copy of   
attendance list was circulated for attendance and corrections.

It was stated that the meeting had been authorized by X3T10 and would be
conducted under the X3 rules.  Working group meetings take no final
actions, but prepare recommendations for approval by the X3T10 task   
The voting rules for the meeting are those of the parent committee,   
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 X3T10 membership.  Working group meetings are
open to any person or company to attend and to express their opinion on   
subjects being discussed.

RAID Study Group Meeting Attendees

Attendee          Company             Email Address
 ----------------  ------------------  -------------------------------
A. Taylor         Adaptec             ataylor at corp.adaptec.com
Eddy Quicksall    Adaptec             edyq at btc.adaptec.com
John Horvath      Adaptec             johnho at btc.adaptec.com
Terry Braun       Adaptec             tbraun at corp.adaptec.com
Paul Massiglia    DEC                 massiglia at genral.enet.dec.com
Dal Allan         ENDL                dal_allen at micmail.com
Bill Hutchison    HP                  hutch at boi.hp.com
George Penokie    IBM                 gop at rchvmp3.vnet.ibm.com
Corky Ball        JMR Electronics     corky at jmr.com
Janakiraman Gopalan Mylex/Buslogic    janakig at mylex.com
Mark Evans        Quantum Corporation mevans at qntm.com
Bob Snively       Sun Microsystems    bob.snively at sun.com
Rick Wagner       Stream Logic        richard_wagner at streamlogic.com
Ray Jantz         Symbios Logic       ray.jantz at symbios.com
Rod DeKoning      Symbios Logic       rod.dekoning at symbios.com
Ralph Weber       Symbios Logic       ralph.weber at symbios.com
Joe Molina        Technology Forums   tforums at ic.manicato.mn.us
Dave Wehrman      Unisys              75122,177 at compuserve.com
Ed Barnes         Xyratex             edbarnes at primenet.com
Herb Silverman    Xyratex             herb at cerf.net

3.       Approval of Agenda

The agenda presented at the meeting was approved.

4.      Report on status of the SCC-2 standard

The SCC-2 project proposal(96-152r0) was accepted by X3T10.

5.      SCC-2 proposals (96-164r1)

George reviewed the SCC-2 proposals (96-164r1) and distributed marked-up
pages showing changes from SCC.  Some questions were raised regarding the
definition of P+S redundancy groups.  The group discussed the  definition
"fractionally exposed".  Concerns were raised about representing the
exchange of controllers providing access to volume  sets.  It was noted
that the proposed definition of the ENABLE RANGE field does not define   
normal case as 00b.

6.      Simplification of SACL configurations (96-196r0)

George described his simplification of the SCC command structure
(96-196r0).  The simplified construction of volume sets from physical
device capacity provoked a lengthy discussion.  The proposal expressed
usage in terms of percentage of the volume set.  A counter proposal
suggested using percentage of the device.  Details of the counter   
were discussed but not fully resolved.

The group also discussed how to simplify configuration.  George supported
developing an intermediate configuation command structure, with a high-
level configuration structure above it and the current detail   
command structure below it.

7.      Action Items

 -Add into the SCC-2 the proposals agreed to by the working group - George
Penokie (DONE)

8.      Meeting Schedule

The next meeting will be hosted by DEC in Natick, MA at the Crowne Plaza
on September 10 9:00AM to Noon.

9.      Adjournment

The meeting was adjourned at 12 noon.

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