rsync error: unexplained error

What steps will reproduce the problem?
1. Trying to copy files via rsync (lots of them) 
2. Files are 300-350 mb each, first 2 are copied but then rsync hangs
3. scp command does the same
4. 1st disk:2tb disk formatted ext3 2 partitions, 2nd disk 2tb ext3 2 
partitions (for back up via rsync)

What is the expected output? What do you see instead?
user x$ rsync -avrzou /Volumes/served/TV_SERIES/A* 
root@10.0.0.2:/usb/sda1/TV_SERIES
root@10.0.0.2's password: 
building file list ... done
...copying....then...
Read from remote host 10.0.0.2: Connection reset by peer
rsync: writefd_unbuffered failed to write 16385 bytes [sender]: Broken pipe (32)
rsync: connection unexpectedly closed (108 bytes received so far) [sender]
rsync error: unexplained error (code 255) at 
/SourceCache/rsync/rsync-37.3/rsync/io.c(452) [sender=2.6.9]

What version of the product are you using? On what operating system?
ns 330 , SNAKE OS V1.2.0 (20100621)  with osx 10.6 or ubuntu 10.10

Please provide any additional information below.
The only solution seems to be this one?
Remove the disks from the nas and from the mac, copy files on different machine 
linux based that can read hfs+ and write on ext3, then put the disks back in 
and share the files.
OK it is doable, but why rsync and ssh (scp) hangs every time that I transfer a 
lot of files? (appr. 1.3 tb?)

Original issue reported on code.google.com by nicktheg...@gmail.com on 11 Dec 2010 at 3:55

eniac111 / snake-os

rsync error: unexplained error #107