Rsync Problem - Files with Alternative Steam Data

I have recently come across an issue when rsyncing data from my local PC to my ReadyNAS 304. I play a selection of SoE games, which get updated regularly over the internet. So I backup a copy, for easy re-installs on my numerous PC/Laptops.

I’m using the following command line:

C:\DeltaCopy\rsync.exe  -v -rlt -z --chmod=a=rw,Da+x --delete "/cygdrive/C/SoE/" "fruit_bowl::Backup/SoE/"

However, recently it has started to “hang” i.e. stop and wait on certain files (unless I put in a –timeout command, which aborts the copy). Upon further inspection, if I try to manually copy a file rsync has “hung” on, I get the following error in Windows:

The file filename.ext has properties that can’t be copied to the new location.

Looking into this, it seems that some of the files have additional alternative data streams, i.e.

On NTFS, files can have more than one stream of data. Usually there's only one, the default, data stream. Windows 2000 and XP used to use alternate streams to store additional properties which you could add in Summary tab of Properties dialog. This feature has been deprecated since Windows Vista. Yet you may still have files with such properties. The warning is displayed when you copy a file which has alternate streams from NTFS drive to a drive that does not support alternate data streams. Therefore the alternate streams will be lost. Usually it's rather safe to ignore this warning. Anyway, in most cases, you can't use that data. Windows also uses alternate data streams to mark files as downloaded from the Internet.

Is there a way for rsync to ignore this data and just copy the file, or do I need to think of another solution to “clean” the files first?

Jonathan