Hello Dana, Please refer to this solved forum thread ..hopefully it answers your questions regarding upgrading from 2010 R3 to 2012.

Hi

Hyper-V backups of Virtual Machines with pass through disks will show the error message "One or more virtual machines have been excluded from the backup as the the virtual machine uses one or more physical disks."

Please check link below

http://www.symantec.com/docs/TECH87330

Hope that helps

Thanks

To avoid the error mentioned in the previous reply, you need to backup the VM's with pass-thourgh disks as if they are physical machines.  First you have to install the remote agent in them and then back them up as if they are physical machines.

please refer to :

http://www.symantec.com/tv/products/details.jsp?vi...

http://www.symantec.com/business/support/index?pag...

if this answer to ur questions please mark it as solution

The Backup Exec 2012 will backup only the VMDK disks in case of using the agent for VMware.

You can backup the pass-through Disk if you would backup the VMS using RAWS (Remote agent for Windows) Then backup exec will list all connected disk as in in case of  physical Server backup.