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Introduction
Updated 6/3/2009 Corrected SODIMM slot info.

| At a Glance | |
|---|---|
| Product | QNAP Turbo NAS (TS-439 Pro) |
| Summary | Four-drive server-like Intel Atom-based BYOD NAS with support for single drives, JBOD and RAID 0, 1, 5, 5+ hot spare and 6. |
| Pros | • Online volume expansion and RAID migration • iSCSI target • Local console and remote SSH root access • Built-in LAMP server, DLNA multimedia server, FTP, iTunes • Fast attached backup to USB and eSATA drives |
| Cons | • Relatively expensive |
QNAP's TS-439 Pro is a four bay version of its six-bay TS-639 Pro. I have told the QNAP story many times now, so I'll just do a quick review of the 439's physical features then go right to Performance.
The 439 Pro looks like a slimmer 639 due to two fewer drive bays. Otherwise, as the opening photo shows, the two products are essentially the same. Figure 1 shows the front and rear panel details. The 439 has one large[r] case fan vs. the 639's two smaller. Both have the same power supply fan. Port complement is the same, right down to the VGA connector for an attached root console.

Figure 1: Front and Rear Panels
Internal Details
Figure 2 shows a view of the 439 from the top with the cover removed. The layout is a bit tighter than the 639's due to the reduced case width. The power supply is easily accessible and, contrary to my observation in the 639 review, the single case fan can be replaced without dropping the back panel. The four screws thread into the fan frame and there is enough space to slide the fan out (after disconnecting the cable) without having to drop the rear panel.
Figure 2: TS-439 Pro top inside view
Updated 6/3/2009 Corrected SODIMM slot info.
I started to remove the board, but halfway through realized that it's the same board as in the 639 based on the Intel N270 Atom clocked at 1.6 GHz, with one SODIMM socket holding 1 GB of DDRII 667 RAM. This single board does double duty since the single Marvell 88SX7042 PCI-e 4-port SATA-II interface is mounted directly on the backplane.
With four Samsung HE103UJ 1 TB drives provided by QNAP with the review unit spun up, the 439's power consumption measured 55 W. With the drives spun down for power saving, wattage dropped to 27W. Like the 639, the 439 was surprisingly quiet in operation, although drive noise was definitely noticeable during performance testing.
Check Price At Amazon
User reviews
Average user rating from: 1 user(s)
Great value and performance
I was able to get the 439 Pro just below the price of the 419P just because the Pro II was available which made it an incredible value. I've upped the RAM to 2Gb which boosts it's performance slightly. Installed are 4x1Tb Seagate 7200.11 drives in RAID5.
Primarily it's a file store and iSCSI target. Files are mostly photos and videos of fairly large sizes (28Mb raw images, 500-1.2Gb .mov files). Of course I do have my music collection there also for iTunes serving. The 439's role is 24x7 on-line storage connected with 2-GigE ports on my Cisco (linksys) SRW2024P with LAG. I'm consistently able to get > 50MB/sec speeds.
My primary storage server is mostly offline except weekends (6x1.5TB).
I rate the features as 4 because I use only 2-3 features that fits my needs and I've not tested the rest in terms of capability.
Related Items:
QNAP TS-809 Pro ReviewedQNAP TS-639 Pro Reviewed (with TS-509 Pro Retest)
New To The Charts: QNAP TS-439 Pro II Turbo NAS
Synology DS508 Performance Retest
NETGEAR ReadyNAS Pro Performance Retest









