I note that you're using copy-pass mode
, where cpio
copies files from one directory tree to another without actually using an archive. Too, because you're talking about Ethernet, I suspect you're copying to a network file system (rather than a physical drive on the same platform)?
Many people report slow throughput to NAS (I suspect that /mnt/NAS/15
is a NAS file system). I'm no expert but some reading of descriptions of similar speed problems (there are a lot of discussions about NAS speed problems) get to turning off HTTPS on the LAN, one in particular at http://arstechnica.com/civis/viewtop...ef28#p22044068
might be interesting to you. It's part of a long discussion of similar problems with speed to yours (read above and below the posts).
You may want to search through the Linux Networking forum here at LQ plus take a look at results from Google searching for "copy to nas slow" for more information. I don't the expertise to help, sorry.
Hope this helps some.