NAS products are equal parts hardware performance and software features. One complements the other in a balanced product. You need more hardware performance to run more software features at the same time.
Since the server we're testing today uses Windows, the possibilities are nearly endless. It's not that Linux systems are incapable of the same functions, but it's that not everyone is versed in Linux configuration and software.
The real limiting factor is the hardware itself. The Intel Atom D2700 is a nice processor for Linux systems, but it feels unreasonably slow in the 5400r when we use RDC to access the system. The processor is limited to just 4GB of RAM as well, so the server is at full capacity when shipped. Data transfers to and from the server are swift, so the input latency we noticed during RDC didn't affect our primary use.
Buffalo includes several software bits with the system like Buffalo Dashboard, a preinstalled feature that is a straightforward interface for configuring the system. The Dashboard software also shows system temperature, fan performance, and a host of other useful features.
Windows Storage Server 2012 R2 has a built-in Dashboard that is identical to Windows Server 2012 R2.
If you are well versed in Windows Server, you may prefer to use the Windows Dashboard for building Storage Pools, Shares, iSCSI, and Work Folders.
Above, we see the default disk configuration with the operating system in RAID 1 on two drives. This chews up 200GB of disk space right off the bat. Four drives then use RAID 5, with 1762GB coming from each dedicated to storage. Users can configure the remaining 200GB available on two drives, but the space isn't used right out of the box.