While running cluster validation it keep throwing warning 
Warning message says that "No Disks were found on which to perform cluster validation tests. To correct this,review that following possible causes:
Here it clearly says that disk should be offline when running this cluster validation test. After bring quorum disk offline and run the validation test and it went through.
While creating virtual networking on one of the Hyper-V 2008R2 host
It was giving an error 12700 VMM cannot complete the host operation on <servername> server because of the error
I tried rebooting/removing and reading back to cluster . But then it always throw an error while creating Virtual Network. Because of this I was not even able to create VM on the cluster . It was giving error "Error 20400 1 parallel subtasks failed during execution.
Found MS KB 2486812 which explain how to fix and what is the root cause. Downloaded nvspbind and run it on problematic Hyper-V cluster.
And finally I was able to create Virtual Network
I wanted to provide CNAME as a DB connection for SCVMM rather than actual server name. The reason for doing so was to make sure incase of mirrored DB goes down, I can make DNS changes and that can take care of SCVMM rather than making registry or application level changes.There are many ways to do so but one registry hack can also make changes.
"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft System Center Virtual Machine Manager Server\Settings\Sql " and update following changes
Restart System Center service and this will update SCVMM as well.
When I was trying to add node into existing cluster it throws the error message "The computer is joined to a cluster." I also found that cluster service was not started.
Hence I decided to remove feature failover cluster but then it throws the message "This server is an active node in a failover cluster. Though this node were not visible under fail over cluster
This seems to issue with stale connections . In order to clear this run PS command clear-clusternode
And finally it will allow to remove failover clustering feature.
While performing configuration of Citrix XenDesktop we found that there were no storage resource available to assign for virtual machine manager. Here we are trying to integrate System Center Virtual Machine Manager 2012 with XenDesktop 5.6
So there are few pre-requisite for storage to showup and this need to configured via SCVMM and Hyper-V host. Here we need to insure that for EVERY host placement is defined as show below
And for same path which is under placement sharing is enabled
Once this done you can view storage under virtual machine storage.
Source : http://blog.itvce.com/?p=675
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