From experience, boto-rsync does not handle large files very well. One of the biggest problems is that it doesn't support multipart uploads. I'd suggest using something like s3cmd, and specifically the sync option. http://s3tools.org/s3cmd-sync
We have some documentation in our wiki about installing and configuring s3cmd to work with DreamObjects. http://wiki.dreamhost.com/S3cmd
One modification I'd recommend is changing "multipart_chunk_size_mb" to something larger, say 50, since you're uploading a 230GB file. Multipart uploads are limited to 10,000 parts.
Let me know if that works better for you.