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- 8 x 3.5" / 2.5" SATA Drive Bays
- 2 x M.2 2280 NVMe SSD Slots
- 2.2 GHz AMD Ryzen V1500B Quad-Core CPU
- 4GB DDR4 ECC RAM
- 4 x Gigabit Ethernet Ports
- 4 x USB 3.1 Gen 1 Ports
- 2 x eSATA Port
- RAID 0, 1, 5, 6, 10, Hybrid, JBOD
- PCIe 3.0 x8 Expansion Slot
- Synology DSM Operating System
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.
Technical Specifications:
Total Installed Memory |
4 GB ECC DDR4 |
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" 2 x M.2 (2280) |
I/O |
4 x RJ45 (Gigabit Ethernet) 4 x USB Type-A (USB 3.1 / USB 3.2 Gen 1 (5 Gb/s)) 2 x eSATA |
Compatible Drive Interface |
SATA (Unspecified Version) |
Media Card Slots |
None |
Maximum Filled Capacity |
108 TB |
Form Factor |
Desktop |
RAID |
RAID 0, 1, 10, 5, 6, JBOD, Synology Hybrid |
Hot-Swap Support |
Yes |
PCI Expansion |
1 x PCIe 3.0 (x8 Electrical) |
Wake on LAN |
Yes |
Link Aggregation and Failover Support |
Yes |
Supported Protocols |
CalDAV FTP HTTP HTTPS NFS SMB SMB 2.1 SMB 3.0 SNMP |
iSCSI LUN |
256 |
iSCSI Target |
128 |
Max Concurrent Connections |
550 |
Max Folders |
512 |
Max Sync Tasks |
80 |
Max Groups |
256 |
Max User Accounts |
2048 |
Max Volume Number |
64 |
Max Cameras Supported |
40 |
Installed Operating System |
Synology |
Supported File Systems |
Internal: BTRFS, EXT4 External: BTRFS, EXT3, EXT4, FAT, HFS+, NTFS, exFAT |
OS Compatibility |
Windows 7 or Later macOS 10.12 or Later *As of January, 2021: Check with manufacturer for the most up-to-date compatibility |
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 Source |
AC Adapter |
Power Consumption |
59.8 W (Typical) 26.18 W (Idle) |
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 |
IR Sensor |
None |
Dimensions |
13.5 x 9.6 x 6.5" / 343 x 243 x 166 mm |
Weight |
13.2 lb / 6.0 kg |
In the Box:
- Synology DiskStation DS1821+ 8-Bay NAS Enclosure
- Power Cable
- Accessory Pack
- 2 x RJ45 LAN Cable
- Limited 3-Year Manufacturer Warranty