Conclusion: QNAP's TS-409 is actually a rather interesting piece of hardware to sum up in review terms, as your reactions to the device will vary quite greatly dependant on what you want from a Network Attached Storage unit. In terms of its administration and web-based interfaces, what QNAP offer here is comprehensive, but personally the interface seemed less user friendly than Synology's equivalent UI. Yes, QNAP's interface is slightly faster to use and browse, but the layout...
Conclusion: Four-drive BYOD NAS with support for RAID 0, 1, 5, 5+ hot spare and 6.
Pros: Hot-swappable drives, Online volume expansion and RAID migration, Automatic rebuild to hot spare, Built-in LAMP server, DLNA multimedia server, FTP, iTunes, USB support for external storage, UPS or up to 3 printers
Cons: Media Center didn't function well with large music library, Thumbnails didn't automatically generate, No US-based phone support
Excerpt: It carries a hefty $600 price tag, but the TS-409 Pro is a sound investment for a home or small business network. For those who need much more than just file storage and backup, this is the NAS to get. In addition to having a central location to store and back up files this product offers hard disk monitoring, FTP, Web, and SMTP server functions, user/group management, and one touch file copy from a USB disk – and that's just scratching the surface!
Summary: I have been very positive about QNAPs previous products. Considering the TS409 Pro is near identical to the previous models I used I focused mainly on the changes in this review. Everything I liked before is still there and still works perfectly. The added value comes from the extra disks and RAID levels supported.
Pros: Gigabit Ethernet, Very complete set of features, Easy to use, Flexible, expandable via USB or by changing the OS, Data redundancy (via RAID), Hotswappable, RAID migration and expansion, Advanced hardware monitoring
Cons: Not the cheapest solution, Struggles under heavy load, No included drives, External non-standard power adapter
Conclusion: My rating of the overall packaging and presentation is somewhat high, as QNAP has done an excellent job of educating consumers with plenty of box-top information so they can make an informed purchase. I would say the box is aimed toward the informed buyer as the information provided might be a little overwhelming to someone new to NAS servers. I personally like the all business approach to the box information rather than pasting catch phrases all over it.
Pros: Very versatile NAS, Excellent Gigabit Ethernet network performance compared to other NAS devices, Multiple options for RAID configurations, Small footprint, small power requirements, Windows ADS compatible, Three USB 2.0 ports for printers, flash drives, hard drives, and other devices., 4 Terabyte storage capacity, Very easy to configure
Cons: No eSATA connectivity, May be expensive for home users, not powerful enough for larger corporate users, Slow transfer speeds when dealing with a large number of small files., AC power adapter brick adds to overall footprint, Problems with USB print jobs disappearing
Summary: The QNAP TS-409 Pro NAS packs a lot of professional features into a compact little unit. White it may seem rather expensive at first, you must consider that It consolodates several different network appliances into one, thereby saving you money. Not only do you get a file server with tons of RAID configurations, you get a web server, FTP server, print server, backup server, download manager, database server, and flexible media server.