Failed to migrate VM in hyper-v cluster?

Dear EE's

When i am trying to migrate the VM from one mode to another node i am facing and error. Here below i mentioned in BOLD is from cluster events.

Please advice me

" Cluster resource 'Virtual Machine MBX_EXCH02' of type 'Virtual Machine' in clustered role 'MBX_EXCH02' failed. The error code was '0xe' ('Not enough storage is available to complete this operation.').

Based on the failure policies for the resource and role, the cluster service may try to bring the resource online on this node or move the group to another node of the cluster and then restart it.  Check the resource and group state using Failover Cluster Manager or the Get-ClusterResource Windows PowerShell cmdlet. "

Thank you
Shamil MohamedIT Infrastructure Engineer/IT Systems ManagerAsked:
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Cliff GaliherCommented:
Pretty straightforward. Your shared storage doesn't have enough space to process the move. There needs to be some free space so the system state can be shifted.
Shamil MohamedIT Infrastructure Engineer/IT Systems ManagerAuthor Commented:
Shared storage means? cluster storage right ? But the all storage having free space around 75% is free space.

Please see the attachments.

Thank you.
Cliff GaliherCommented:
Don't forget that many SANs allow thin provisioning. So the storage can appear tito have more free space than it really does. And that is a problem when extra space is requested to move the VM.
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Shamil MohamedIT Infrastructure Engineer/IT Systems ManagerAuthor Commented:
No SAN which i provisioned all are fixed (thick) provisioning. Is there anyway its related to the count of cores in processors?
Cliff GaliherCommented:
Not with that error. A storage error is a storage error. Has anything there changed recently?
Shamil MohamedIT Infrastructure Engineer/IT Systems ManagerAuthor Commented:
Nothing Bro I didn't changed much. I added extra storage for cluster and created VM's.

Its rectified now. I tried to lower number of core per vm and tried to Migrate. its worked and successfully migrated. I think core count is insufficient.

Thank you Bro.

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Shamil MohamedIT Infrastructure Engineer/IT Systems ManagerAuthor Commented:
I found myself in trail and error method. Number of core is changed to right number.
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Windows Server 2012

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