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LUNs Seen Multiple Times at the Operating System Level

 
Daniel Faille
Occasional Contributor

LUNs Seen Multiple Times at the Operating System Level

Greetings,

When I create and map a LUN to a server running Windows Server 2008 x64 using the HP StorageWorks Simple SAN Connection Manager, the LUN is seen by the OS multiple times.

I read here: http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=421492&prodTypeId=18964&objectID=c01459160 that this can happen if you have multipath setup. I do see the appearance of the LUN 1 time for every path.

How do I fix this?
4 REPLIES 4
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Dileep..
Trusted Contributor

Re: LUNs Seen Multiple Times at the Operating System Level

Hi,
Do you have MPIO installed onm the server?
If not do install MPIO and check the status


Regards,
Dileep
Daniel Faille
Occasional Contributor

Re: LUNs Seen Multiple Times at the Operating System Level

Where do I get MPIO?
Daniel Faille
Occasional Contributor

Re: LUNs Seen Multiple Times at the Operating System Level

Yes, Multipath I/O is installed as a feature on this server.
Marcus Schack
Trusted Contributor

Re: LUNs Seen Multiple Times at the Operating System Level

Did you install the MPIO version from HP site? Do not use the one from Windows 2008. Here is the link.

http://h20000.www2.hp.com/bizsupport/TechSupport/ProductList.jsp?lang=en&cc=us&prodTypeId=18964&prodSeriesId=421492&taskId=135