Limit from Windows Backup in SBS 2011 / 2TB drive or Partition

Hi,

i want to ask if the Windows Backup in SBS 2011 / is Limited to 2TB per Partition or drive?

so if i have a drive 3TB with 2 partitions C:\ 1,5TB and D:\ 1,5TB it would be ok to backup this? i get then 2 VHD Files wich are smaller than 2TB and all ok?