Synology DiskStation DS1821+ NAS Desktop Ethernet LAN Black V1500B

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.

2 x M.2 NVMe
Enable ultra-fast NVMe cache to accelerate HDD arrays by 20X or more
10GbE support
Add in faster SFP+ or RJ-45 networking to turbocharge existing workflows
Storage Expansion
Supports two DX517 expansion units for a total of 18 bays

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.

Active Backup for Business
Centralize backup tasks for VMware, Windows, and file servers. Restore whatever you want fast and reliably when needed.
Hyper Backup
Comprehensively back up your data to a local shared folder, an external device, another Synology NAS, an rsync server, or a public cloud to ensure data safety.
Drive Package
Safeguard your computer with Synology Drive Client. Effortlessly perform real-time data backups and point-in-time file recovery.
Active Backup for Microsoft 365 / Google Workspace
Protect corporate data stored on the cloud. On-premise backup solution with a centralized dashboard. Optimize storage efficiency with single instancing and block-level deduplication technology.

Powered by Synology DiskStation Manager

Central Management System
Conveniently manage your fleet of Synology NAS from a centralized console.
Synology MailPlus
Secure, reliable, and private mail server solution with an intuitive and modern mail client.
Synology High Availability
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Security
Secure data with comprehensive built-in security tools to protect your devices against evolving threats.
Synology Drive
Instantly access your NAS files across multiple devices whenever you want, wherever you are.
Surveillance Station
Complete surveillance solution for recording, monitoring, and management.

Works best with Synology drives
Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.

Storage drive capacity	6 TB
Storage drive interface	Serial ATA III
Supported storage drive interfaces	M.2, Serial ATA II, Serial ATA III
Storage drive sizes supported	2.5,3.5,M.2
Number of M.2 (M & B) slots	2
RAID support	Yes
RAID levels	0, 1, 5, 6, 10, JBOD
Online RAID migration	Yes
Online RAID expansion	Yes
Hot-swap drive bays	Yes
Supported file systems	BTRFS, Fat, HFS+, NTFS, exFAT, ext3, ext4
Storage drives installed	Yes
Total installed storage capacity	48 TB
Number of storage drives installed	8
Number of storage drives supported	8
Installed storage drive type	HDD
Supported storage drive types	HDD & SSD
Processor manufacturer	AMD
Processor family	Ryzen Embedded
Processor model	V1500B
Processor frequency	2.2 GHz
Processor cores	4
Processor threads	8
L2 cache	2 MB
L3 cache	4 MB
Number of processors supported	1
Internal memory	4 GB
Internal memory type	DDR4
Maximum RAM supported	32 GB
Memory slots	2
Memory form factor	SO-DIMM
ECC	Yes
Ethernet LAN	Yes
Ethernet LAN data rates	10,100,1000 Mbit/s
iSCSI support	Yes
Wake-on-LAN ready	Yes
Supported network protocols	SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN
Link aggregation	Yes
USB port	Yes
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	4
eSATA ports quantity	2
Ethernet LAN (RJ-45) ports	4
PCI Express x8 (Gen 3.x) slots	1
Chassis type	Desktop
Cooling type	Active
Product colour	Black
Number of fans	2 fan(s)
Fan diameter	12 cm
Drive bay locking	Yes
LED indicators	Alarm, HDD, LAN, Power, Status
Cable lock slot	Yes
Cable lock slot type	Kensington
Type	NAS
Device class	Home & Home Office
Backup function	Yes
Backup features	Cloud, iSCSI LUN
Multilingual support	Yes
Number of users	2048 user(s)
Noise level	22.2 dB
Snapshot	Yes
Share folder access right management	Yes
Security algorithms	HTTPS, SSH, SSL/TLS
Access Control List (ACL)	Yes
Reset button	Yes
On/off switch	Yes
Built-in FTP server	Yes
Browser supported	Chrome, Firefox, Edge, Internet Explorer, Safari
System log	Yes
Hot spare	Yes
Share folder	SMB/AFP/NFS/FTP/WebDAV
Operating system installed	DiskStation Manager
Windows operating systems supported	Yes
Mac operating systems supported	Yes
Power supply location	Built-in
Power supply unit (PSU) capacity	250 W
Number of power supply units	1
Redundant power supply (RPS) support	No
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
Width	343 mm
Depth	243 mm
Height	166 mm
Cables included	AC, LAN (RJ-45)
Power cables quantity	1
Sustainability compliance	Yes
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	5 - 95%
Storage temperature (T-T)	-20 - 60 °C
Storage relative humidity (H-H)	5 - 95%
Operating altitude	0 - 5000 m
Compliance certificates	BSMI, CCC, CE, EAC, Federal Communications Commission (FCC), KC, RCM, RoHS, UKCA, VCCI