For what it's worth, I took the following steps to "rename" the volume without actually renaming it:
1. Create a subdirectory within the default Volume_1 that exists on the drive. I created the directory through the Advanced > Network Access area by browsing for a folder and clicking on the "new directory" icon.
2. Create a new network access setting to the new directory, setting the permissions according to your needs. In my case, the SMB share created looks like this:
NAS-01 Volume_1/NAS-01 ALL [no comment] No No R/W [Yes]
3. Remove the original share to Volume_1 from within the SMB list.
Now when you browse to the DNS-323 through Windows (or mount it in linux), it won't show Volume_1, but instead the name of your new share, in my case, NAS-01.
Hope that helps!