Plugin for EMC VMAX fibre channel storage

I am new to Oracle VM and VM Manager. After reading the documentation, I believe that I need a plugin for VM Manager to discover our EMC VMAX Fibre Channel SAN LUNs. As it is now, discovery on its own does not show the LUNs. Where can I get this plugin? I contacted EMC and they know nothing about a plugin.

904115 wrote:
I am new to Oracle VM and VM Manager. After reading the documentation, I believe that I need a plugin for VM Manager to discover our EMC VMAX Fibre Channel SAN LUNs. As it is now, discovery on its own does not show the LUNs. Where can I get this plugin? I contacted EMC and they know nothing about a plugin.There is no plugin for EMC VMAX SANs. It will use the Unmanaged FC Storage Array functionality. If you are not seeing your VMAX luns, check that multipathd is started on your Oracle VM Server and that multipath.conf has the correct device {} stanza for the VMAX.

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http://blogs.msdn.com/b/san/archive/2008/07/27/microsoft-mpio-command-line-reference-mpclaim-and-server-core-configuration.aspx
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http://sourcedaddy.com/windows-7/configuring-multipath-io.html
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> but we need more CPUs and Ram! for our application !! that is what will solve the problem!
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>
>
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[Warning: A little self promotion follows. Read at your own risk!]
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First let me apologize for not responding earlier to your response, I tend to get busy and then forget to check back here.
Tod, the answer to your question is No, only one computer is accessing the xserve raid files at any one time and that is via Fibre Channel. However I do have the xserve raids set up as share points via ethernet.
Maybe I should turn that off and only access the files with the one computer that can connect via fibre channel.
I never thought of that. I will try that while I await for your answer, thanks again.
Todd Buhmiller
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Apple Fibre Channel Cards in Xserve, and Mac Pro Tower; Apple 2 Port 4Gbs Fibre Channel Card
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Widescreen Media
Calgary, Alberta Canada
Tod Kuykendall
Posts: 1,237
From: San Diego
Registered: Oct 11, 2000
Re: Xserve Raid Mounts, Corrupt Directory tired of rebuilding directory
Posted: Jun 27, 2010 1:25 PM in response to: Todd Buhmiller
Are multiple computers accessing the same data on the RAID at the same time?
If so then NO. This is the source of your data corruption and I'm surprised if you were able to get all your data back every time if this is how you've been running your system. Each fibre channel assumes it has full and sole control of every volume it has mounted, no data arbitration is practiced and data corruption will occur if this assumption is wrong.
The only way this set-up will work is to use partitions or LUN masks so the volumes are accessed by one computer at any time. As long as one computer relinquishes control before another mounts it you will dodge arbitration issues but this is a dangerous game. If you screw up and mount an already mounted volume - and there is no easy way to tell if a volume is mounted - corruption will then occur. Sharing data simultaneous at fibre speeds is what XSAN does and to do this you need it.
HTH,
=Tod
Intel Xserve, G5 XServes, XRAID, Promise

+The xserve raids will mount automatically to any computer that I connect the qlogic fc switch to+
This is source of the corruption to your data. Any computer that attaches to a drive/partition via fibre channel assumes that it alone is in control of the drive and data corruption is inevitable.
+Is that the issue, should I disconnect the xserve from the fc switch and leave it connected via ethernet?+
Short answer: YES. The ethernet connections are fine because the server is controlling the file arbitration through the sharing protocol. Fibre channel connections assumes complete control over the partition and no arbitration of the file access is performed. It's like two people independently driving trying to drive the same car to different locations.
Depending on your set-up it is possible for the two machines to see and use different parts of the Xserve RAID storage but they cannot access the same areas without SAN doing the arbitration.
Hope that's clear,
=Tod

Plugin for EMC VMAX fibre channel storage

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