Synology DiskStation DS1821+ 8-Bay NAS Enclosure
High capacity storage and data protection for anyone.
Designed for scalability and performance
The 8-bay Synology DS1821+ is aimed at IT enthusiast and SMB customers looking for a powerful and scalable storage solution, its business-grade backup solutions keep users safe and protected from potential data loss, while major improvements to compute capabilities and throughput means workloads are finished faster than ever before.
CPU
AMD Ryzen™
Quad-core 2.2 GHz
Cache Acceleration
Dual M.2 2280 slots for NVMe Cache
Performance
113K 4K random read IOPS1
Scalability
Expand up to 18 drives
with two DX517 expansion units
The performance you need
Reduce transfer times with the DS1821+, designed to accelerate your workloads. Easily add faster networking and NVMe drives to further boost performance.
Up to read/write
2,322/1,460 MB/s
networking
10GbE
cache & storage pool
Storage that fits your needs
Make the most of high-performance networking and file access without taking up unnecessary space. DS1821+ comes equipped with 8 bays and can scale up to 18 bays with 2 DX517 expansion units as your data needs grow.
5 bays15 bays 
108 TB252 TB
DiskStation DS1821+
- Status indicator
- Alert indicator
- Power button and indicator
- LAN indicator
- Drive status indicator
- Drive tray
- Drive tray lock
- USB 3.2 Gen 1 port
- Power port
- System fan
- PCIe expansion slot
- Kensington Security Slot
- Expansion port
- 1GbE RJ-45 port
- Reset button
- USB 3.2 Gen 1 port
Hardware Specs.
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CPU
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CPU Model | AMD Ryzen V1500B |
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| CPU Quantity | 1 | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 4-core 2.2 GHz | |
| Hardware Encryption Engine (AES-NI) | ||
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Memory
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System Memory | 4 GB DDR4 ECC SODIMM |
| Memory Module Pre-installed | 4 GB (4 GB x 1) | |
| Total Memory Slots | 2 | |
| Maximum Memory Capacity | 32 GB (16 GB x 2) | |
| Notes |
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Storage
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Drive Bays | 8 |
| Maximum Drive Bays with Expansion Unit | 18 (DX517 x 2) | |
| M.2 Drive Slots | 2 (NVMe) | |
| Compatible Drive Type* (See all supported drives) |
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| Hot Swappable Drive* | ||
| Notes |
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External Ports
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RJ-45 1GbE LAN Port | 4 (with Link Aggregation / Failover support) |
| USB 3.2 Gen 1 Port* | 4 | |
| eSATA Port | 2 | |
| Notes | The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. | |
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PCIe
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PCIe Expansion | 1 x Gen3 x8 slot (x4 link) |
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File System
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Internal Drives |
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| External Drives |
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| Notes | exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center. | |
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Appearance
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Size (Height x Width x Depth) | 166 mm x 343 mm x 243 mm |
| Weight | 6 kg | |
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Others
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System Fan | 120 mm x 120 mm x 2 pcs |
| Fan Speed Mode |
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| Easy Replacement System Fan | ||
| Brightness Adjustable Front LED Indicators | ||
| Power Recovery | ||
| Noise Level* | 22.2 dB(A) | |
| Scheduled Power On / Off | ||
| Wake on LAN / WAN | ||
| Power Supply Unit / Adapter | 250 W | |
| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption | 59.8 W (Access) 26.18 W (HDD Hibernation) |
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| British Thermal Unit | 204.05 BTU/hr (Access) 89.33 BTU/hr (HDD Hibernation) |
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| Notes |
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Temperature
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Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Storage Temperature | -20°C to 60°C (-5°F to 140°F) | |
| Relative Humidity | 5% to 95% RH | |
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Certification
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Warranty
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3-year hardware warranty, extendable to 5 years with EW201 or Extended Warranty Plus | |
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Environment
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RoHS Compliant | |
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Packaging Content
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Optional Accessories
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