BackupPC Server:
CentOS 6.3
4GB Ram
Quad Core 1.6ghz Xeon CPU 5110
Raid 5 - 5 2tb drives current state active. totaling 7.9tb storage 4.6tb free
2 1gb Network Interfaces Bonded mode 4

Network Switch: cisco WS-C4948-10GE
All other servers being backed up are connected to the same switch.

Cisco port configurtations for the Backup Server

interface GigabitEthernet1/31
 channel-protocol lacp
 channel-group 30 mode active
!
interface GigabitEthernet1/32
 channel-protocol lacp
 channel-group 30 mode active
!

All of the listed servers are connected to the same 4948 switch. All have 1gb connection to this switch.

All linux servers are backed up via rsync daemon. Windows servers are backed up via smb access to C$

The majority of the servers have less then 200gb of information that is being backed up. However, the following servers store a rather large amount of data:

DVR - 1.1tb currently
SC - 1.3tb currently

The SC server is my primary concern. As you can see, I have not been able to acquire a full backup on that server.