Test setup
The TS-209 was tested with the shipped firmware. There are newer firmwares available
here, however, due to some stupid things I did myself I couldn't rerun the tests with these.
The test system is connected directly via the UTP cable that came with the TS-209. The NIC used is an Intel GilGal (Server Ethernet Controller). Storage comes from a SCSI RAID 5 array. Software wise nothing much is set up, the only real change made to the network settings are 9K Jumbo packets.
Performance is tested via FTP file transfer(up/down), Samba (Windows file sharing, up/down) and HTTP (down).
Performance is about twice that of a 100 MBit line. Even though this is a noticeable difference I can't help thinking higher speeds must be attainable via 1 Gbit. On the PC's side there wasn't any bottleneck and the two SATA drives can do a lot more even on their own. Single drive, RAID 0 or RAID 1 made little to no difference on performance.
The most common way to access the NAS on a LAN is via SMB which is compatible to Windows File Sharing protocol.