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<FONT face=Tahoma size=2><B>From:</B> openib-windows-bounces@openib.org
[mailto:openib-windows-bounces@openib.org] <B>On Behalf Of </B>Alex
Estrin<BR><B>Sent:</B> Monday, December 25, 2006 5:47 AM<BR><B>To:</B> Andrey
Slepuhin; Yossi Leybovich<BR><B>Cc:</B>
openib-windows@openib.org<BR><B>Subject:</B> Re: [Openib-windows] Windows SRP
multipathing<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV id=idOWAReplyText89611 dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Hi Yossi,
Andrey,</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Unless supported by
OS, multipath DSM drivers provided by storage vendors, it is their
prerogative.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>So until HP sertified/validated
OpenFabric SRP driver I do not see how HP MPIO DSM </FONT><FONT
face=Arial size=2>could be used.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>With regard
to Microsoft there is a working generic DSM included
in MPIO DDK, that can be used as-is if HBA+storage
SPC-3 compliant. I think SRP should be just fine. What about
storage?</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Yossi, d</FONT><FONT face=Arial><FONT
size=2>id you look at Microsoft DSM code?<BR><SPAN
class=356592408-25122006><FONT color=#0000ff>[Yossi Leybovich] not yet .
I waiting for MS approval for getting the MPIO
DDK </FONT></SPAN></FONT></FONT></DIV>
<DIV dir=ltr><FONT face=Arial><FONT size=2>Do you think it is
workable alternative to team it with SRP?<BR><SPAN
class=356592408-25122006><FONT color=#0000ff>[Yossi Leybovich] I
hope </FONT></SPAN></FONT></FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Thanks,</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>Alex</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT><FONT face=Arial
size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV></DIV>
<DIV dir=ltr><BR>
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<FONT face=Tahoma size=2><B>From:</B> openib-windows-bounces@openib.org on
behalf of Andrey Slepuhin<BR><B>Sent:</B> Sun 12/24/2006 12:58
PM<BR><B>To:</B> Yossi Leybovich<BR><B>Cc:</B>
openib-windows@openib.org<BR><B>Subject:</B> Re: [Openib-windows] Windows SRP
multipathing<BR></FONT><BR></DIV>
<DIV>
<P><FONT size=2>Dear Yossi,<BR><BR>I have one 2-port PCI-X HCA in each of 4
cluster nodes. Different HCA<BR>ports are connected to two different IB
subnets managed by Silverstorm<BR>InfinIO 5000 switches.<BR>The switches are
connected to different FC controllers on HP MSA1500cs <BR>storage using
IB-FC gateway (Silverstorm VFx module). On the VFx module<BR>I mapped FC
target to both IOCs. If I will map it only to one IOC, I<BR>will see each
logical disc 2 times instead of 4, but there will be two<BR>SRP miniport
drivers in Windows device manager marked by exclamation sign.<BR>Please note
that I have 2 separate subnets. Should I connect the IB<BR>switches together
to have a single subnet?<BR><BR>Regarding the disks: They are writable and
they are working fine, but if<BR>I map a disk to the certain drive letter,
this drive will be accessible<BR>only while the appropriate path is
working.<BR><BR>HP storage has 2 active-active controllers, so the host can
choose any<BR>path to access the storage. They have MPIO-based MSD drivers and
the<BR>management software that allows to choose the primary and the
failover<BR>paths, but this software just does not see any array devices if
I'm<BR>using SRP as a SCSI driver. The same for array management utility: I
can<BR>not update the firmware and configure logical volumes on the storage
if<BR>I'm working through SRP driver (I was forced to plug QLogic 2340
HBA<BR>into one node to do these tasks).<BR><BR>Best
regards,<BR>Andrey<BR><BR><BR>Yossi Leybovich wrote:<BR>>
Hi<BR>><BR>> First I build new binaries base on revision 566.<BR>> I
hope we will post it to the web early next week.<BR>> Note that the build
include fix to blue screen when 2 HCA on the same<BR>> host connected to
the same storage.<BR>><BR>> WinIB does support multipath but only
between ports of the same HCA.<BR>> Mean if you connect both ports of the
HCA to the storage they will<BR>> appear as one controller and switch if
one port fail.<BR>><BR>> We just now started to look at the MPIO DDK and
I hope we will be able<BR>> to support it.<BR>><BR>> Can you describe
the connectivity of your network ?<BR>> Does the multiple paths is feature
in the eHP storage ? Can you disable<BR>> it ?<BR>> What is the problem
with multiple disks instances ? Cannot you write to<BR>> the disks
?<BR>><BR>> >From my experience with Enginio storage I just disable
their fail over<BR>> feature and I did not see the multiple
disks.<BR>><BR>> I hope that in the coming weeks we will be able to
support MPIO.<BR>> Thakx<BR>>
Yossi<BR>><BR>><BR>><BR>> <BR>>> -----Original
Message-----<BR>>> From: openib-windows-bounces@openib.org<BR>>>
[<A
href="mailto:openib-windows-bounces@openib.org">mailto:openib-windows-bounces@openib.org</A>]
On Behalf Of<BR>>> Andrey Slepuhin<BR>>> Sent: Thursday, December
21, 2006 10:25 PM<BR>>> To: Tzachi Dar<BR>>> Cc:
openib-windows@openib.org<BR>>> Subject: Re: [Openib-windows] Windows
SRP multipathing<BR>>><BR>>> Currently I'm running build
1.0.0.506.<BR>>><BR>>> Best regards,<BR>>>
Andrey<BR>>><BR>>> Tzachi Dar
wrote:<BR>>> <BR>>>> What version of
openib stack are you using?<BR>>>> As far as I can tell there have
been many changes in this area from<BR>>>> the last build that openib
has made.<BR>>>> (this means that you will probably have to update
your binaries).<BR>>>><BR>>>> Thanks<BR>>>>
Tzachi<BR>>>><BR>>>> <BR>>>> <BR>>>>>
-----Original Message-----<BR>>>>> From:
openib-windows-bounces@openib.org<BR>>>>> [<A
href="mailto:openib-windows-bounces@openib.org">mailto:openib-windows-bounces@openib.org</A>]
On Behalf Of Andrey<BR>>>>> Slepuhin<BR>>>>> Sent:
Thursday, December 21, 2006 4:13 PM<BR>>>>> To:
openib-windows@openib.org<BR>>>>> Subject: [Openib-windows]
Windows SRP multipathing<BR>>>>><BR>>>>> Dear
folks,<BR>>>>><BR>>>>> We have 4-node cluster system
using 2 QLogic (Silverstorm) InfinIO<BR>>>>> 5000 switches, HP
DL385 servers and HP MSA1500cs
storage.<BR>>>>> <BR>>>
The cluster<BR>>> <BR>>>>> is working
under MS Windows Server 2003 x64. We successfully<BR>>>>>
installed IB stack including SRP drivers, and the logical disks
on<BR>>>>> the storage are visible on the cluster nodes. The
problem is that<BR>>>>> each disk is encountered 4 times due to
the
multiple<BR>>>>> <BR>>>
paths. We tried<BR>>> <BR>>>>> HP DSM
driver for Microsoft MPIO but unfortunately
it<BR>>>>> <BR>>>
doesn't work -<BR>>> <BR>>>>> it
seems that the driver expects only QLogic and Emulex
FC<BR>>>>> <BR>>>
HBAs. Does<BR>>> <BR>>>>> anybody
have an experience with IB SRP multipathing
on<BR>>>>> <BR>>>
Windows? Any<BR>>> <BR>>>>> help will
be much appreciated.<BR>>>>><BR>>>>> Thanks in
advance,<BR>>>>> Andrey Slepuhin,<BR>>>>> Head of
Cluster Solutions Center,<BR>>>>>
T-Platforms<BR>>>>><BR>>>>> <A
href="http://www.t-platforms.ru/english">http://www.t-platforms.ru/english</A><BR>>>>>
tel.: +7 495 9565490, +7 495 7440995<BR>>>>> fax: +7 495
9565415<BR>>>>> mob.: +7 916
1636117<BR>>>>><BR>>>>><BR>>>>>
_______________________________________________<BR>>>>>
openib-windows mailing list<BR>>>>>
openib-windows@openib.org<BR>>>>> <A
href="http://openib.org/mailman/listinfo/openib-windows">http://openib.org/mailman/listinfo/openib-windows</A><BR>>>>><BR>>>>> <BR>>>>> <BR>>>
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