Buffalo TeraStation 3420 SMB NAS Review

Buffalo offers a refreshed SMB NAS lineup and today we have the TeraStation 3420 NAS with us to examine closely in our labs.

Published Fri, Jun 4 2021 9:53 AM CDT
Rating: 88%Manufacturer: Buffalo (TS3420DN0402)

When Buffalo announced their new LinkStation and TeraStation platforms a few months back, I quickly got in touch to get samples sent to the lab for testing. We came away really happy with the LinkStation SoHo just a month back, a fantastic low-cost two drive platform with 2.5Gbe out of the box. TeraStation adds to this with a higher level of build quality, four drive bays, and a better hardware platform underneath.

At the heart of the TeraStation 3420, we have the Annapurna Labs AL214, quad-core SOC that operates at 1.4GHz and is paired with 1GB of DDR3 and a four-drive SATA backplane. Connectivity includes USB 3.2 Gen 1 on the rear panel along with 2.5Gbe and 1Gbe LAN.

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MSRP of the Buffalo TeraStation 3420DN with 4x 2TB drives comes in at $649.99 with a one-year warranty.


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Packaging is pretty basic; a sticker gives capacity information and the number of drives.

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Included with the TeraStation, we have the power cord, keys, and ethernet cable.

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The TeraStation keeps the same aesthetic as the past few years. Still an industrial look to it with a front mesh panel with Buffalo logo in the center. To the right, we have the barrel lock and up above the power button and LEDs.

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On the back, we have the power input at the top, down below a single large fan for cooling and USB 3.2 and RJ45 ports.

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Opening the door, we have four drive bays, all numbered.

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Drives in the TeraStation are IronWolf over the Barracuda drives offered in LinkStation appliances.

TeraStation 3420DN Set-Up

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NAS Navigator allows you to search and set up the TeraStation.

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Setup takes only a few moments and allows you to choose what RAID mode you want to use.

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Once you are in, the Buffalo interface is simply offering an overview of the system on the dashboard. To the left, we have a menu system that provides navigation between each setup menu.

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File Sharing offers a full menu to create folders along with managing users and groups. Down below, you can enable or disable services.

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The storage menu allows you to access drives, both internal and USB. You can set up RAID modes and the logical volume manager, including iSCSI.

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Cloud Storage has expanded and includes Amazon, Dropbox, and Azure. OneDrive is a new addition to this menu.

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The networking menu allows you to set up each port, including proxy, domains, and port trunking.

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Backup offers replication NAS to NAS and USB along with Time Machine support for macOS.

Testing - Benchmarks

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Starting testing, I set up the TeraStation in RAID 5 and tapped into iSCSI. In this setup, I reached 279 MB/s reads and 159 Mb/s write.

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RAID 5 over SMB showed 225 MB/s reads and 184 MB/s write.

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Moving the NAS over to RAID 6 with iSCSI, we dropped a few MB/s, read now at 213 MB/s and write as 230 MB/s.

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SMB with RAID 6 showed 222 MB/s reads and 159 MB/s write.

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Our next test was running a backup scenario to the NAS with RAID 5, where we saw 255 MB/s on average.

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Switching the backup scenario to RAID 6, we got 209 MB/s for the workload.

Final Thoughts

Wrapping up this review, the TeraStation 3420DN is a solid upgrade to the platform that takes advantage of proven/reliable hardware used in the past with the Annapurna Labs AL214. The AL214 is a powerful quad-core SoC that I've seen in many entries and mid-level platforms from several vendors and has proven itself quite good in appliances that take advantage of 2.5Gbe, like the 3420DN.

The software platform on the TeraStation is essential but pure storage driven, offering features like R-Sync, Active Directory, and iSCSI. Additionally, Buffalo has tapped the cloud adding Dropbox, Azure, and OneDrive as options for cloud connectivity, while externally, a 2.5Gbe connection allows for increased performance and productivity.

Turn-Key is one of the best features of Buffalo platforms, and the TeraStation 3420DN offers several models that include 8TB, 16TB, and 32TB SKUs; they also provide partially populated 4TB with 2x2TB drives. This gives consumers a solid amount of options to start with and room to upgrade if ever needed.

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The Bottom Line

Consumers and businesses looking for a turnkey NAS for the office should really look at what the TeraStation 3420DN has to offer.

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* Prices last scanned on 6/25/2021 at 2:37 am CDT - prices may not be accurate, click links above for the latest price. We may earn an affiliate commission.

Tyler joined the TweakTown team in 2013 and has since reviewed 100s of new techy items. Growing up in a small farm town, tech wasn't around, unless it was in a tractor. At an early age, Tyler's parents brought home their first PC. Tyler was hooked and learned what it meant to format a HDD, spending many nights reinstalling Windows 95. Tyler's love and enthusiast nature always kept his PC nearby. Eager to get deeper into tech, he started reviewing.

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