Elite Bastards posted a review on the QNAP TS-409 Turbo NAS

Amongst the network settings is the ability to enable, disable and configure numerous facets of the device, which also allows us to see just how much functionality the TS-409 offers. This includes an FTP service, the ability to use the device as an iTunes, web or MySQL server, or as a media server complete with support to provide media to an Xbox 360 or PlayStation 3 console.

One of the more powerful aspects of the TS-409 involves the simple creation and upgrade of disk volumes. RAID volumes can easily be migrated on the fly, making for simple upgradability whether you're adding or upgrading drives, with this portion of the control panel showing the current status of any volumes together with those upgrade options.

QNAP TS-409 Turbo NAS Review