VMWARE backup running slow compare to normal backups

Hi,

I have configured backup using VMWARE host but the backups are running very slow 100GB in one hour 10mins. I have tested using normal file level backups it is taking only 50mins for 100GB. But Vmware policy backups should be fast as we are taking backups through SAN.

Below are the environment details.

Netbackup 7.5

Master:Windows 2008 R2

Vcenter 5.5

I have selected the transport method as SAN: Use san to move virtual disk data.

Please help me out.

Regards,

Kiran Tarlada