LUNs Seen Multiple Times at the Operating System Level

[Daniel Faille]

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?

[Dileep..]

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


Regards,
Dileep

[Daniel Faille]

Where do I get MPIO?

[Daniel Faille]

Yes, Multipath I/O is installed as a feature on this server.

[Marcus Schack]

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