DSM-G600, DNS-3xx and NSA-220 Hack Forum

You can setup your rsync/DeltaCopy backup in two ways:
A. rsyncd running on DNS-323 and DeltaCopy client on PC.
B. rsync running on DNS-323   and DeltaCopy server on PC.
Which way do you want it to be?

I went with plan B since the DNS-323 is an under-powered device and I didn't want it to have a server running 24/7 which was only used a few minutes a day.

Another thing you need to consider: does your file or directory names use unicode characters? If so, you might run into problems since out-of-the-box DeltaCopy comes with cygwin binaries that were not compiled to support that. The DeltaCopy forums contain more details about how to sort this out.
If you go with plan B and have such unicode issues, Consider using cwrsync instead of DeltaCopy which appears to support unicode out-of-the-box.
There's no front-end to configure the server such as in DeltaCopy so you need to "fudge" in rsyncd.conf file, but I think it's a plus: You're not limited to the DeltaCopy server front-end's very limited set of options.

Decisions decisions

My PC is not on that often and my DNS-323 is on 24/7.  So, I use plan A.  The rsyncd daemon uses up less space than either the samba or sshd servers, so I don't see that as a problem.

Off the top of my head, you need to add a stanza to the rsyncd.conf file running on your 323 to define the backup target.  One of mine looks something like this:

[Stan]
        path = /data/Backups/Stan
        comment = Toaster
        read only = no
        list = yes
        auth users = karl

"Stan" is the name of the Windows PC that is running DeltaCopy.  /data is a symlink to my HD_a2 on the 323.  I call my 323 "Toaster", so "Toaster" will show up in the DeltaCopy GUI.

You'll also need to create a rsyncd.secrets file and reference it from the rsyncd.conf file.  There I have a password associated with the user "karl".

You'll probably need to consult an online man page for rsync/rsyncd to get the exact details.

The rest of the work is on the PC side - just run DeltaCopy and set it up to copy the files you want to the 323.  I then periodically run DeltaCopy whenever the PC is on.

If I'm using plan A with DeltaCopy client, the auth users and the password in the secrets file, is that my Windows login and password or my DNS login and password? I'm getting "@ERROR: auth failed on module Backup".
Thanks.