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Description
Expand the network storage capacity for your small- to medium-business or SOHO (Small Office, Home Office) environment with the DiskStation DS1821+ 8-Bay NAS Enclosure from Synology. Useful for high-speed file sharing, backups, and surveillance, this enclosure supports up to eight 3.5" and 2.5" SATA drives in RAID 0, 1, 5, 6, 10, Synology Hybrid, and JBOD modes for up to 110,000 4K random read IOPS and 2300 MB/s sequential write speeds to handle demanding workloads. Installing up to two M.2 NVMe PCIe solid-state cache drives into the available slots can boost hard drive array performance by over 20x. In addition to having four Gigabit Ethernet ports with Link Aggregation and Failover support, the PCIe 3.0 x8 slot allows you to install expansion cards such as 10GbE network adapters to further enhance performance. The DiskStation DS1821+ works with Windows 7 and macOS 10.12 or later systems, and its integrated Synology DSM operating system supports a host of applications for file management, security, and more.
Additional information
| Weight | 18 lbs |
|---|---|
| Dimensions | 18 × 14.6 × 12.3 in |
| CPU | 2.2 GHz AMD Ryzen V1500B Quad-Core |
| Power Source | AC Adapter |
| Installed Operating System | Synology |
| Supported File Systems | Internal: BTRFS, EXT4<br />External: BTRFS, EXT3, EXT4, FAT, HFS+, NTFS, exFAT |
| OS Compatibility | Windows 7 or Later<br />macOS 10.12 or Later |
| Supported Browsers | Chrome, Edge, Firefox, Internet Explorer, Safari |
| Encryption | AES-NI |
| Security Features | Password Protection |
| VPN Client Connections | 30 |
| AC Input Power | 100 to 240 VAC, 50 / 60 Hz |
| Power Consumption | 59.8 W (Typical)<br />26.18 W (Idle) |
| Max Volume Number | 64 |
| PSU Wattage | 1 x 250 W |
| Operating Temperature | 32 to 104°F / 0 to 40°C |
| Operating Humidity | 5 to 95% |
| Storage Temperature | -4 to 140°F / -20 to 60°C |
| Status Monitoring | LED Indicator |
| Audible Alarm | Yes |
| Cooling | 2 x 120 mm Fans |
| Noise Level | 22.2 dBA |
| Built-In Speakers | None |
| Max Cameras Supported | 40 |
| Max User Accounts | 2048 |
| Total Installed Memory | 4 GB ECC DDR4 |
| RAID Modes | RAID 0, 1, 10, 5, 6, JBOD, Synology Hybrid |
| User-Replaceable Memory | 1 x 4 GB |
| Total Memory Slots | 2 x SO-DIMM |
| Maximum Memory Capacity | 32 GB |
| Number of Bays | 8 x 2.5"/3.5"<br />2 x M.2 (2280) |
| Connections | 4 x RJ45 (Gigabit Ethernet)<br />4 x USB Type-A (USB 3.1 / USB 3.2 Gen 1 (5 Gb/s))<br />2 x eSATA |
| Compatible Drive Interface | SATA (Unspecified Version) |
| Media Card Slots | None |
| Maximum Filled Capacity | 108 TB |
| Form Factor | Desktop |
| Hot-Swap Support | Yes |
| Max Groups | 256 |
| PCI Expansion | 1 x PCIe 3.0 x8 |
| Wake on LAN | Yes |
| Link Aggregation and Failover Support | Yes |
| Supported Protocols | CalDAV<br>FTP<br>HTTP<br>HTTPS<br>NFS<br>SMB<br>SMB 2.1<br>SMB 3.0<br>SNMP |
| iSCSI LUN | 256 |
| iSCSI Target | 128 |
| Max Concurrent Connections | 550 |
| Max Folders | 512 |
| Max Sync Tasks | 80 |
| IR Sensor | None |
Reviews (8)
8 reviews for Synology DiskStation DS1821+ 8-Bay NAS Enclosure
Only logged in customers who have purchased this product may leave a review.
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Elroy Strosin
Verified Purchase
After only 6 months of using this product my team and I were able to double our project outflow of video edits as the external logins for my team have been exceptional. The backup drives and amount of space you can load onto one NAS is priceless. I think this product is a perfect addition to a growing team.
Zena Lemke
Verified Purchase
Fast and easy setup. Great OS.
Jordyn Altenwerth
Verified Purchase
The product works as advertised. Thank you Synology for a great product.
Madisen Jacobi
Verified Purchase
I purchased an open box DS1821+. I was hesitant due to the fact it was not ‘new’, but I grabbed it anyway. If it had been unboxed previously, I could not tell, though there was a hole in the box, possibly from a forks? Anyway, where the hole was, there was a matching dent in the side of the case, but it works flawlessly. I would recommend Synology for anyone needing NAS/SAN storage for their home lab, or for their small office.
Garry VonRueden
Verified Purchase
The DS1821 I initially received failed after less than 10 days of use (it appeared to be a faulty power supply or main board). The RMA process with Synology went smoothly and I had a brand new unit within a few days. The replacement had been running for a couple weeks now without issue (it was even able to recover all data from the first unit despite the failure happening during an array expansion). As far as connectivity goes, the link aggregation has been great and definitely speeds up access across my network. I’ve also added a dual port 10GbE adapter to allow even faster transfers to a couple of workstations. Lastly, the visualization features are working well. W With a few virtual machines running, I’m seeing virtually no interruptions to the storage. Overall, this was a worthwhile purchase and Synology’s support was very responsive.
Destini Borer
Verified Purchase
I have a DS1511+, DS1817+ and now a DS1821+. See a pattern emerging ? As soon as I saw the ECC memory, I had to have it. I know what all the tech people say about ECC but when I switched to an ECC laptop 6 months ago, I can now run tests for days without it shutting down and the laptop never crashes. So with the old NAS, I have seen some bizarre data loss that I can’t explain on the DS1817+ with zero errors indicated. So, I want ECC on my NAS too. Added the 10gb card, works good too but exposes the limitations of the drives you use with transfer speeds.
Coby Hills
Verified Purchase
This is an excellent NAS that is full featured and very easy to configure and use. The usual B&H customer service was outstanding and it’s good to know they’re standing behind me for any support I need.
Logan Stroman
Verified Purchase
I upgraded from DS1618 to DS1821 – what a difference – 1821 is quiet. It does not interfere with my audio system. Love it. Backups are quick. Got plenty of memory.