Minutes of X3T10 SCC Working Group Meeting - May 07, 1996
Lohmeyer, John
JLOHMEYE at cossymwest.co.symbios.com
Tue May 14 08:46:00 PDT 1996
* From the SCSI Reflector, posted by:
* "Lohmeyer, John" <JLOHMEYE at COSSYMWEST.CO.SYMBIOS.COM>
*
Accredited Standards Committee
X3, Information Processing Systems
Doc. No.: X3T10/96-165r0
Date: May 10, 1996
Project: 1047D
Ref. Doc.:
Reply to: G. Penokie
To: Membership of X3T10
From: George Penokie
Subject: Minutes of X3T10 SCC Working Group Meeting -May 07, 1996
AGENDA
1. Opening Remarks
2. Attendance and Membership
3. Approval of Agenda
4. Report on status of the SCC-2 project proposal
5. Indication that a redundancy group is overlaid
6. Making it illegal to modify an object without specifying the object
7. Allow a spare to be configured to cover all like objects within a
target in one service action
8. Add disable, enable, and report disabled volume set service actions
9. Add a report device identification service action
10. What to return in Report LUN command?
11. The difference between p_extent and ps_extent
12. Add in a new redundancy group identifier of P+S redundancy
13. Configure Storage Array Command and Report Storage Array
Configuration
Command
14. Annex of configuration examples
15. Action Items
16. Meeting Schedule
17. Adjournment
Results of Meeting
1. Opening Remarks
George Penokie convened the meeting at 9:00 am, Tuesday, May 07, 1996.
He thanked Norm Harris of Adaptec for hosting the meeting.
This is a joint meeting of the X3T10 SCSI Controller Commands working
group
and the RAB Host Interface working group. 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
the
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
group.
The voting rules for the meeting are those of the parent committee,
X3T10.
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
the
subjects being discussed.
RAID Study Group Meeting Attendees
Attendee Company Email Address
---------------- ------------------ -------------------------------
A. Taylor Adaptec ataylor at corp.adaptec.com
Edward Fong Amdahl esfi0 at spg.amdahl.com
Chris Nieves Auspex cnieves at auspex.com
Doug Hagerman DEC hagerman at starch.enet.com
Paul Massiglia DEC massiglia at genral.enet.dec.com
Brett Quinn EMC quinn_brett at isus.emc.com
John Hartjen EMC hartjen_john at isus.emc.com
Dal Allan ENDL dal_allen at micmail.com
George Penokie IBM gop at rchvmp3.vnet.ibm.com
Dan Strevey Intellistor/Fujitsu dstrevey at intellistor.com
Corky Ball JMR Electronics corky at jmr.com
Bob Snively Sun Microsystems bob.snively at sun.com
Rick Wagner Stream Logic richard_wagner at streamlogic.com
Rod DeKoning Symbios Logic rod.dekoning at symbios.com
M.W. Jibbe Symbios Logic mahmoud.jibbe at symbios.com
Joe Molina Technology Forums tforums at ic.manicato.mn.us
Dave Wehrman Unisys 75122,177 at compuserve.com
Paul Scammell Veritas ps at veritas.com
Rager Klorese Veritas rogerk at veritas.com
Ed Barnes Xyratex/Peer edbarnes at primenet.com
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) will be presented to X3T10 for vote.
5. Indication that a redundancy group is overlaid
This proposal was accepted without comment.
6. Making it illegal to modify an object without specifying the
object
This proposal was accepted without comment.
7. Allow a spare to be configured to cover all like objects within a
target in one service action
It was requested that the term 'like objects' be clearly defined in SCC.
This definition should also discuss if like objects may or may not have a
capacity less than the spare (eg can a 2GB drive cover a 1GB drive).
During the discussion it was requested that the cover all be split into
to
two functions. One function would be to cover all like devices regardless
of any other currently defined spares (note: this is the way things work
in
SCC and that behavior should be make clear in SCC-2). The other would be
to only cover those like objects that are not already covered by a spare.
(note: if there are no objects free to spare then an error should occur.)
8. Add disable, enable, and report disabled volume set service
actions
The group requested the disable and enable volume set service actions be
renamed to deassign and assign volume set. No other requests for changes
was made.
9. Add a report device identification service action
This proposal was accepted without comment.
10. What to return in Report LUN command?
This was not discussed.
11. The difference between p_extent and ps_extent
George pointed out the model is not clear and the differences between a
p_extent and a ps_extent. Information will be added to the model in
SCC-2
to make it cleared on the differences.
12. Add in a new redundancy group identifier of P+S redundancy
This was proposal was accepted with requests that more information be
added
to the model to give examples of what things the spare would cover.
13. Configure Storage Array Command and Report Storage Array
Configuration Command
A long discussion occurred on weather a one command configuration is
desired
or possible. The group agreed such a command would be a good idea. The
problem is getting more than two groups to agree on what the parameters
should be specified and the meaning of those parameters. Rod agreed to
put
a list of proposed parameters on the SCSI reflector within two weeks.
14. Annex of configuration examples
George expressed the opinion that an annex containing examples of how a
host would use the SCC commands to configure various RAIDs would be
useful.
All agreed this is a good idea but is a big job and it is uncertain it
actually be completed.
15. Action Items
-Develop a list of actions that could be used to create a one step
configuration command - Rod DeKoning
-Add into the SCC-2 the proposals agreed to by the working group - George
Penokie
16. Meeting Schedule
The next meeting will be hosted by Symbios Logic in Colorado Springs at
the
Embassy Suites July 16 9:00AM to Noon.
17. Adjournment
The meeting was adjourned at 12 noon.
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