Comment 6 for bug 471512

Using Ubuntu 10.04 LTS as a samba cifs client against a synology ds107+ NAS
The synology ip address is registered in /etc/host on the client with the name mini

on the client
uname -a
Linux xps 2.6.32-24-generic #42-Ubuntu SMP Fri Aug 20 14:21:58 UTC 2010 x86_64 GNU/Linux

lspci
09:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5906M Fast Ethernet PCI Express (rev 02)

iperf -c mini -f m -t 120 -i 10 -p 5002
------------------------------------------------------------
Client connecting to mini, TCP port 5002
TCP window size: 0.02 MByte (default)
------------------------------------------------------------
[ 3] local 192.168.0.3 port 38552 connected with 192.168.0.10 port 5002
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 98.8 MBytes 82.9 Mbits/sec
[ 3] 10.0-20.0 sec 99.2 MBytes 83.2 Mbits/sec
[ 3] 20.0-30.0 sec 98.8 MBytes 82.9 Mbits/sec
[ 3] 30.0-40.0 sec 99.4 MBytes 83.3 Mbits/sec

FTP speeds are consistent with iperf speeds ~8MBytes/s transfer both ways
SMB/cifs speeds to the same synology nas gives 700kBytes !! download / 7.5MBytes upload
All the config files on the ubuntu client are untouched
The problem is encountered when both connecting through nautilus then using nautilus copy or through an sudo mount.cifs then using an rsync -P -v

The file used for testing speed is 1.1GBytes