Minutes of SMR Study Group July 18, 2013
gerry.houlder at seagate.com
Thu Jul 25 10:49:20 PDT 2013
Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r1307250_f.htm">HTML-formatted message</a>
Ric and Christoph,
Do you think we need to discuss the details of SMR recording with this
group? Or can we just say that SMR resuts in areas that must be treated as
"write sequential, read random" and not have to explain why? If we don't
have to explain this, we can focus more on discussing the decisions a host
system needs to make to use this type of device efficiently.
On Thu, Jul 25, 2013 at 12:25 PM, Ric Wheeler <rwheeler at redhat.com> wrote:
> Great, a single proposal will make it easier to pitch....
> On 07/25/2013 01:24 PM, Jorge.Campello at hgst.com wrote:
>> I believe the group is coalescing around the strategy of having a single
>> unified proposal that the group would put out to the community for
>> feedback, as opposed to having several different SMR proposals presented.
>> We are setting up a higher cadence of meetings to make sure we can get
>> unified proposal/presentation done.
>> That said, we can still have a couple of distinct presentations with
>> different aspects of the proposal done so that it is broken up into
>> and easier to digest pieces.
>> I will likely be there for both events.
>> *Ric Wheeler <rwheeler at redhat.com>*
>> 07/25/2013 10:01 AM
>> Gerry Houlder <gerry.houlder at seagate.com>, Christoph Hellwig <
>> hch at infradead.org>
>> T10 Reflector <t10 at t10.org>, Curtis Stevens <
>> curtis.stevens at wdc.com>, Dan Colegrove <daniel.colegrove at hgst.com>, Dave
>> B Anderson <dave.b.anderson at seagate.com>, James Borden <
>> james.borden at wdc.com>, Jim Hatfield <james.c.hatfield at seagate.com>**,
>> Jim Malina <Jim.Malina at wdc.com>, Jorge Campello <Jorge.Campello at hgst.com>,
>> Mike Fitzpatrick
<mike.fitzpatrick at taec.**toshiba.com<mike.fitzpatrick at taec.toshiba.com>>,
>> Mike H Miller <mike.h.miller at seagate.com>, Patrick Hery <
>> patrick.hery at taec.toshiba.com**>, William Boyle <William.B.Boyle at wdc.com>,
>> Zvonimir Bandic <zvonimir.bandic at hgst.com>
>> Re: Minutes of SMR Study Group July 18, 2013
>> I want to introduce you all to Christoph Hellwig who is looking to lead
>> the SMR
>> and SCSI mid layer talk in New Orleans. Christoph is one of the leaders
>> in file
>> system work and storage/SCSI, so he comes uniquely qualified to pull this
>> together for us.
>> What we would like to know is how many people would like to take part in
>> Orleans? Of those, how many have proposals that they can share (note
>> that the
>> proposals should be very short since we want to have this as a discussion
>> than a lecture).
>> Also, I can share that the Linux Foundation has also agreed to give us
>> space at LinuxCon Europe which is where the Linux Kernel Summit will
>> happen. I
>> think that we will get room for 30-40 people for at least a few hours, so
>> be able to follow up at that time as well and have a broader audience of
>> We might also want to touch on anything else that we are looking to
>> (atomic writes, etc) during part of this time.
>> On 07/23/2013 10:41 AM, Gerry Houlder wrote:
>> > The meeting anad webex started at 3:30 pm on july 18. Those attending
>> > Mr. Kevin Marks Dell, Inc.
>> > Mr. David Black EMC Corporation
>> > Mr. HengLiang Zhang Futurewei Technologies Inc
>> > Mr. Curtis Ballard Hewlett-Packard Company
>> > Mr. Rob Elliott Hewlett-Packard Company
>> > Mr. Dan Colegrove HGST
>> > Mr. Zvonimir Bandic HGST
>> > Mr. Kevin Butt IBM Corporation
>> > Mr. Pak-Lung Seto Intel Corporation
>> > Mr. Hugh Curley KnowledgeTek Inc
>> > Mr. John Lohmeyer LSI Corporation
>> > Mr. Dave Uddenberg LSI Corporation
>> > Mr. John Geldman Micron Technology Inc
>> > Mr. Calvin Chen Microsoft Corporation
>> > Mr. Frederick Knight NetApp
>> > Mr. Ie-Wei Njoo PMC-Sierra
>> > Mr. Keith Shaw PMC-Sierra
>> > Mr. Tim Symons PMC-Sierra
>> > Mr. Ric Wheeler Redhat
>> > Mr. Ronald Dennison Research Development Consultants Inc
>> > Mr. William Martin Samsung Semiconductor Inc (SSI)
>> > Mr. Martin Czekalski Seagate Technology
>> > Mr. Tim Feldman Seagate Technology
>> > Mr. Jim Hatfield Seagate Technology
>> > Mr. Gerald Houlder Seagate Technology
>> > Mr. Martin Furuhjelm Seagate Technology
>> > Mr. Mark Gaertner Seagate Technology
>> > Mr. Joe Breher Synapse Design Automation
>> > Mr. Patrick Hery Toshiba America Electronic Components
>> > Mr. Albert Chen Western Digital Corporation
>> > Mr. Takeaki Kato Western Digital Corporation
>> > Mr. Curtis Stevens Western Digital Corporation
>> > Mr. Ralph Weber Western Digital Corporation
>> > Mr. Curtis Stevens Western Digital Corporation
>> > Mr. Scott Watson Western Digital Corporation
>> > Mr. Jim Malina Western Digital Corporation
>> > Mr. William Boyle Western Digital Corporation
>> > Mr. Alan Westbury Xyratex
>> > Mr. Ron Dennison Consultant
>> > Mr. Tim Emani
>> > Mr. Garth Gibson
>> > Mr. Alan Poston
>> > The first presentation was by Dan Colegrove (HGST). His presentation is
>> > in 13-186r0, posted on T10.org web site.
>> > The second presentation was by Jim Malina (WD). His presentation is
>> shown in
>> > 13-184r0, posted on T10.org web site. This presentation explained the
>> > of defining a new device type for SMR disks instead of being a sub-type
>> > direct access devices.
>> > Gerry Houlder (Seagate) disclosed plans to make an SMR presentation at
>> > Plumbers Conference (Sept. 18-20, New Orleans) and LinuxCon Europe (Oct.
>> > 21-23, Scotland). The intend is to use information from the 3
>> > that have been publicly disclosed during SMR study group meetings to
>> > After the webex time completed, WD shows a live demo of a Linux host
>> with two
>> > drives that implement the interface recommended in their presentation.
>> > drive was a single zone and the other drive was a multi-zone
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