Speed up NIC / Rsync transfer rate on N54L Ubuntu Server

Hi experts,

I was hoping you could help me with this problem.
I am transferring 5TBs of data from an old Netgear ReadyNas NX v1 to my new HP Microserver N54L via an rsync.
However I am getting only

230,559,744 100%    1.38MB/s    0:02:39 (xfr#2536, ir-chk=1041/54820)

I was hoping someone could help me for out how to improve that, as it has been 2 weeks, and it is slow going.  
1. I cannot set mtu over 1500 on the N54L (is set on the ReadyNas NX)
2. I cannot get throughput over 1.4MBs :(

Some data for you, ethtool and ifconfig

Settings for em1:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
        Link partner advertised pause frame use: No
        Link partner advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: off
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x000000ff (255)
                               drv probe link timer ifdown ifup rx_err tx_err
        Link detected: yes
root@NASMedia:/home/craig# ifconfig
em1       Link encap:Ethernet  HWaddr fc:15:b4:90:36:a1
          inet addr:192.168.99.21  Bcast:192.168.99.255  Mask:255.255.255.0
          inet6 addr: fe80::fe15:b4ff:fe90:36a1/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1524649 errors:0 dropped:1768 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:332042199 (332.0 MB)  TX bytes:680 (680.0 B)
          Interrupt:18

eth0      Link encap:Ethernet  HWaddr 00:24:27:fe:8b:e2
          inet addr:192.168.99.221  Bcast:192.168.99.255  Mask:255.255.255.0
          inet6 addr: fe80::224:27ff:fefe:8be2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:462331468 errors:0 dropped:1769 overruns:0 frame:0
          TX packets:83198154 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:661902799947 (661.9 GB)  TX bytes:5756148471 (5.7 GB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:2276 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2276 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:136784 (136.7 KB)  TX bytes:136784 (136.7 KB)

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