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Synology 6 bay NAS DiskStation DS1621+

About this item Accelerated Performance: 174% higher 4K random read IOPS and 76% faster sequential write speeds compared to its predecessor Maximize Performance: Turbocharge HDD arrays by 20x or more...
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Subtotal: $1,099.99
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Synology 6 bay NAS DiskStation DS1621+

Synology 6 bay NAS DiskStation DS1621+


Synology 6 bay NAS DiskStation DS1621+


About this item

  • Accelerated Performance: 174% higher 4K random read IOPS and 76% faster sequential write speeds compared to its predecessor
  • Maximize Performance: Turbocharge HDD arrays by 20x or more without occupying drive bays using dual built-in M.2 slots for NVMe SSD cache
  • Easy Expansion: Scale-up on-demand to 16 drives with two DX517 expansion units
  • Includes Everything to Protect Your Data: Back up critical data to and from public clouds, Windows PCs and servers, virtual machines, and data on the NAS with Synology Active Backup suite, Hyper Backup, and Snapshot Replication
  • Ready for 10GbE: Add in a 10GbE SFP+ or RJ-45 NIC to instantly increase network bandwidth based on your existing infrastructure
Powerful, scalable, and versatile

Synology DS1621+ is a powerful and compact 6-bay network attached storage solution designed to store and protect critical data assets. Today’s growing amount of unstructured data requires smarter and increasingly higher performance methods of storing, accessing, and collaborating. Designed for scalability, DS1621+ enables you to start small, then expand as your data grows.

Turbocharge and expand it

DS1621+'s dual M.2 2280 slots allow NVMe SSD caching to boost performance by 20x or more for commonly accessed data. It also supports an optional 10GbE NIC for faster network environments and more concurrent users.


File sharing and syncing

With comprehensive support for all major file sharing protocols — like CIFS, AFP, NFS, FTP and more — DiskStation lets you centralize files in one place and access them using any device. Take files on the road or easily share them with other people, thanks to Synology's easy file sharing and syncing software.

Bulletproof data backup

Ensure data remains safe by backing up your computers, servers, and virtual machines to DiskStation, and defend yourself from human-error or ransomware with the multi-version backup. Finally, avoid disaster with the ability to easily back up DiskStation to an offsite location or to any major cloud service.

Virtualization ready

With support for VMware, Citrix, and Microsoft Hyper-V, DiskStation serves as a seamless storage solution for virtualization environments. Additionally, Synology’s Virtual Machine Manager also lets you set up and run various virtual machines directly on DiskStation, including Windows, Linux, and Virtual DSM.

Smart video surveillance

Make your own video surveillance hub. Surveillance Station helps you protect your home or business by offering the ability to manage multiple network cameras, check live camera feeds from anywhere with the mobile app, catch suspicious incidents quickly with intelligent alerts, and easily find relevant recordings.

Returns Policy

You may return most new, unopened items within 90 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Customer Reviews

Based on 5 reviews
Simple to set up, this unit is flexible for growth

Flexibility, 6 bays, setup fairly easy. I’m using 6 4tb drives giving close to 18tb avg. I’m using it on a win 10 network with 4 total NAS units. Speed and function were exactly as I expected. I store photos and data files all critical. I expect long service from the unit, drives will be changed around the 2-4 yr service life on a 24/7 cycle.

Great NAS

This is my second Synology NAS and the price/features/quality/support is awesome. Running 6x Synology 8TB NAS drives, 2x 2TB Crucial P5 NVMe and 2x 16GB Arch Memory SO-DIMMs. No complaints!
Migration from my old Synology NAS couldn't be easier. Originally started with 4x drives in SHR-1 config and added two more drives and converted the storage pool to SHR-2 and expanded the volume. Took a long time (nearly a month), but couldn't been easier to do.

Works great and pretty easy to setup

I was worried that the NAS work be underpowered. Worried for nothing. Works great. The built in software makes all the difference!

ts a start. no issues so far. equip it as you might see fit.

Unit arrived well packaged and in pristine condition. software was easy to install. initial volume creation for an SHR LUN 4 x 8 TB IronWolf NAS drives took about 12.5 hours. Link aggregation across the 4 x 1 GigE ports was easy and well-documented. Added a 16 GB DIMM without issue. Added a pair of m.2 drives for cache. Added a dual port 10 GigE SFP+ Intel 520 adapter which was trouble free which was aggregated for a 20 Gbps link. It would be nice to have a 2nd one for them to replicate between. maybe someday.

Good upgrade

I needed to upgrade from another NAS that was almost a decade old. I finally had run out of space. I also wanted to be able to install Plex on the new NAS. Setting up a remote connection to my old NAS (which was not a Synology) and then having the files copy for about 36 hours (lotsa TBs) while I left it alone worked great. Setup was a snap, migration was easy, Plex installation worked first time. I'm a happy camper. Hopefully this NAS will last me another 10 years.

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