hi, I have a problem with DELL server with two HBAs that connect to EMC2 storage.
I've installed Hyper-V Server 2008 R2 and enabled failover clustering.
Installed Mpio software from EMC2. I've registered the server with Server Utility and from Disk Management I can now see the 4 volumes (LUNs).
First run validating tests and had some warnings regarding disks.
I've installed the failover cluster correctly.
Now when I try to add disks or storage it says that there are no such devices.

Can enybody help?

The warnings regarding disks need to be investigated. Even after the Failover Cluster has been established you can go rerun the validation tests and ensure that you have a supported cluster configuration. Can you run through the validation again and post the information on the warning messages? With the current information you provided it is pretty difficult to troubleshoot.

HI, resolved..now the hyper-V cluster is up and running and can switch over the resources.
The only funny part and a bit tedious if I can say, is the creation of VM once you have enabled CSV disks.
The path should bee C:\ClusterStorage\Volume1 and the location?
When I try to create a VM the wizard only sees local disks, not the CSV disks. In the first option I've inserted the path C:\ClusterStorage\Volume1 , but I can't understand where to define the real location of VM.
Non very stright forward approach...

ok, answered myself:
http://searchstorage.techtarget.com.au/articles/33698-How-to-Implement-Hyper-V-R2-s-new-Cluster-Shared-Volumes-feature

Be aware that when you create the BASIC disks for cluster to define the proper lable, otherwise you will have to FORMAT the volume to set the new label.