DiskStation 8 Bay NAS (Up to 18 Bay) AMD Ryzen V1500B; 4GB DDR4 ECC SO-DIMM; 4x GbE; 4xUSB3.1; 2x eSATA | DS1821+

Hardware Specifications

CPU

CPU Model AMD Ryzen V1500B

CPU Quantity 1

CPU Core 4

CPU Architecture 64-bit

CPU Frequency 2.2 GHz

Hardware Encryption Engine

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

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.

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.

For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.

Storage

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

Hot Swappable Drive*

Notes

The hot swappable drive feature is not supported by M.2 SSD slots.

"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.

External Ports

RJ-45 1GbE LAN Port 4

USB 3.2 Gen 1 Port* 4

Expansion Port 2

Expansion Port Type eSATA

Notes The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.

PCIe

PCIe Expansion 1 x Gen3 x8 slot (x4 link)

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

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 watts

AC Input Power Voltage 100V to 240V AC

Power Frequency 50/60 Hz, Single Phase

Power Consumption 59.8 watts (Access)

26.18 watts (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%