Wbadmin issue in windows server 2012 R2

HI,

Recently we installed the windows 2012 R2 with role hyper-v & failover cluster services in our new server.

Also downloading and installing the all recently windows updating.

Everything seen is fine.

But when we try to do the backup using Wbadmin on this new server, it will got issue.Refer to below :

1) if i only backup the C driver (OS installed driver) & system state only, it will backup successfully & quickly.

2) But if i backup the system including the EFI system partion, it will take about 12 hours to finish the backup. The backup always be running in status : Backup in process for EFI system partion. and theData transfer always is ZERO. But if it begin to transfer ,it will finish it quickly.

I try to post the picture, but the forums will remind me *Body text cannot contain images or links until we are able to verify your account*.

Thanks.