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 Model: AMD Ryzen V1500B
CPU Architecture: 64-bit
CPU Frequency: 4-core 2.2 GHz
Hardware Encryption Engine (AES-NI)
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)
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.
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)
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
Storage Pool and volume creation require all drives to be listed as compatible on the device model's compatibility list.
"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.
RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support)
USB 3.0 Port 4
eSATA Port 2
PCIe Expansion 1 x Gen3 x8 slot (x4 link)
Notes exFAT Access is purchased separately in Package Center.
Size: (Height x Width x Depth) 166 mm x 343 mm x 243 mm
Weight: 6 kg
System Fan: 120 mm x 120 mm x 2 pcs
Fan Speed Mode
Easy Replacement System Fan
Brightness Adjustable Front LED Indicators
Noise Level* 22.2 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
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)
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%
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
3-year hardware warranty, extendable to 5-year coverage - EW201
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Main Unit X 1
Accessory Pack X 1
AC Power Cord X 1
RJ-45 LAN Cable X 2
Quick Installation Guide X 1
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
Surveillance Device License Pack
Notes All memory modules will operate at the maximum frequency specified by the CPU manufacturer.