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. A powerhouse on all fronts The DS1821+ can handle demanding application workloads and a greater number of concurrent users. Experience faster file indexing in Synology Drive, photo organization in Moments, and more responsive web services. Turbocharge and supersize it Upgrade your DS1821+ to match your data requirements, whether it is for faster networking or for higher storage capacity. Ultimate file management and sharing File Station is a web-based, fast and secure management tool built to allow easy, drag-and-drop operations without requiring any complex setup on Mac or PC. Advanced search and filtering tools allow for easy organization and file sharing. For complete compatibility, DS1821+ supports the following protocols: AFP, FTP, iSCSI, NFS, SMB, and WebDAV. Fully certified storage virtualization solutions Synology iSCSI storage fully supports most virtualization solutions to enhance work efficiency with easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations and optimizes computation efficiency. Windows Offloaded Data Transfer (ODX) speeds up data transfer and migration rate. OpenStack Cinder support turns your Synology NAS into a block-based storage component. Ultimate Backup Solution DS1821+ integrates various backup applications into an intuitive user interface, offering durable storage technologies to safeguard your valuable data on any device. Works best with Synology drives Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.

Processor
Processor family	AMD Ryzen
Processor manufacturer	AMD
Processor model	V1500B
Processor frequency	2.2 GHz
Processor cores	4
On-board graphics card model	Not available
Memory
Internal memory	4 GB
Internal memory type	DDR4
Maximum RAM supported	32 GB
Memory slots	2
Memory form factor	SO-DIMM
ECC	Y
Ports & interfaces
Ethernet LAN (RJ-45) ports	4
USB port	Y
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	4
eSATA ports quantity	2
PCI Express x8 (Gen 3.x) slots	1
Weight & dimensions
Width	343 mm
Depth	243 mm
Height	166 mm
Weight	6 kg
Power
Power supply location	Built-in
Power supply unit (PSU) capacity	250 W
Number of power supply units	1
Power consumption (typical)	59.8 W
Power consumption (HDD standby)	26.18 W
AC input voltage	100-240 V
AC input frequency	50/60 Hz
Operational conditions
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	5 - 95%
Storage temperature (T-T)	-20 - 60 °C
Network
Ethernet LAN	Y
Ethernet LAN data rates	1000 Mbit/s
iSCSI support	Y
Wake-on-LAN ready	Y
Supported network protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Link aggregation	Y
Storage
Storage drives installed	N
Number of storage drives supported	8
Installed storage drive type	N
Supported storage drive types	HDD & SSD
RAID support	Y
Supported storage drive interfaces	M.2, Serial ATA
Storage drive sizes supported	2.5,3.5,M.2
Maximum supported storage capacity	108 TB
Number of M.2 (M & B) slots	2
RAID levels	0, 1, 5, 6, 10, JBOD
Online RAID migration	Y
Online RAID expansion	Y
Hot-swap drive bays	Y
Supported file systems	BTRFS, Fat, HFS+, NTFS, ext3, ext4
Certificates
Certification	RoHS FCC CE BSMI EAC CCC KC VCCI RCM
Software
Operating system installed	DiskStation Manager
Server operating systems supported	Windows Server 2016, Windows Server 2019
Packaging content
Cables included	AC, LAN (RJ-45)
Design
Chassis type	Tower
Cooling type	Active
Product colour	Black
Number of fans	2 fan(s)
Fan diameter	12 cm
Fan diameter 2	12 cm
LED indicators	Y
Cable lock slot	Y
Cable lock slot type	Kensington
Performance
Type	NAS
Device class	Large Enterprise Business
Backup function	Y
Backup features	Cloud, iSCSI LUN
Multilingual support	Y
Number of users	2048 user(s)
Noise level	22.2 dB
Snapshot	Y
Web-based management	Y
Access Control List (ACL)	Y
Reset button	Y
On/off switch	Y
Browser supported	Google Chrome, Firefox, Microsoft Edge, Internet Explorer 10+, Safari 10+
System log	Y
Hot spare	Y
Logistics data
Harmonized System (HS) code	84714100