Allocating Lun to Hyper-V host

There might be multiple ways to allocate lun to Hyper-V clusters but I follow below way . Once lun is allocated via storage system it will be available via disk management on one of the cluster node. Bring it online and format it without drive letter and partition name.

Once drive is formatted open cluster manager and browse to storage right click to add the storage

Once added it will show up as available storage

Now we need to allocate this to cluster shared volumes

Once this is allocated it will showup under cluster manager and under SCVMM

Failover Cluster validation warning: No disk were found

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.

Error 12700 VMM cannot complete host operation while creating Virtual Networks

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

Change DataBase location for System Center VMM 2012

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.

 

This node is an active node in a failover cluster - Windows 2008R2

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.