Synology DiskStation DS1821+ 8-Bay NAS Server

Specifications

CPU

CPU Model: AMD Ryzen V1500B

CPU Architecture: 64-bit

CPU Frequency: 4-core 2.2 GHz

Hardware Encryption Engine (AES-NI): Yes

Memory

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

Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.

Storage

Drive Bays: 8

Maximum Drive Bays with Expansion Unit: 18 (DX517 x 2)

M.2 Drive Slots: 2 (NVMe)

Compatible Drive Type*

3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
M.2 2280 NVMe SSD

Maximum Single Volume Size*: 108 TB

Hot Swappable Drive: Yes

Notes

"Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
Each internal volume (may consist of multiple drives) is expandable up to 108TB.

External Ports

RJ-45 1GbE LAN Port: 4 (with Link Aggregation / Failover support)

USB 3.0 Port: 4

eSATA Port: 2

PCIe

PCIe Expansion: 1 x Gen3 x8 slot (x4 link)

File System

Internal Drives

Btrfs
EXT4

External Drives

Btrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT*

Notes

exFAT Access is purchased separately in Package Center.

Appearance

Size (Height x Width x Depth): 166 mm x 343 mm x 243 mm

Weight: 6 kg

Others

System Fan: 120 mm x 120 mm x 2 pcs

Fan Speed Mode

Full-Speed Mode
Cool Mode
Quiet Mode

Easy Replacement System Fan: Yes

Brightness Adjustable Front LED Indicators: Yes

Power Recovery: Yes

Noise Level*: 22.2 dB(A)

Scheduled Power On / Off: Yes

Wake on LAN / WAN: Yes

Power Supply Unit / Adapter: 250 W

AC Input Power Voltage: 100 V to 240 V AC

Power Frequency: 50/60 Hz, Single Phase

Power Consumption*

59.8 W (Access)
26.18 W (HDD Hibernation)

British Thermal Unit

204.05 BTU/hr (Access)
89.33 BTU/hr (HDD Hibernation)

Notes

Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75°C; Humidity: 58.2-61.8%

Temperature

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

Standards

Certifications

FCC
CE
BSMI
EAC
CCC
KC
VCCI
RCM

Environment

RoHS Compliant

Packaging Content

Items included

Main Unit X 1
Accessory Pack X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Quick Installation Guide X 1

Optional Accessories

Extras

DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G
Expansion Units: DX517
2.5" SATA SSD: SAT5200
M.2 2280 NVMe SSD: SNV3400
10GbE Network Interface Card: E10G18-T2/E10G18-T1/E10G17-F2
VisualStation: VS960HD/VS360HD
Surveillance Device License Pack

Notes

All memory modules will operate at the maximum frequency specified by the CPU manufacturer.