- Data management and protection, for anyone

Features
POWERFUL, SCALABLE AND VERSATILE
- Synology DS1621+ is a powerful and compact 6-bay network attached storage solution designed to store and protect critical data assets
- Todays growing amount of unstructured data requires smarter and increasingly higher performance methods of storing, accessing, and collaborating
- Designed for scalability, the DS1621+ enables you to start small, then expand as your data grows
* CPU: AMD Ryzen Quad-core 2.2 GHz
* Cache Acceleration: Dual M.2 2280 slots for NVMe Cache
* Performance: 110K, 174% higher 4K random read IOPS
* Scalability: Expand up to 16 drives with two DX517 expansion units

FASTER THAN EVER
- Compared to its predecessor, DS1621+ is faster in just about everything
- Get things done quicker through Synology Drive and streamline photo management with Synology Moments
* 47.01% faster in file indexing

TURBOCHARGE AND EXPAND IT
- Upgrade your DS1621+ to match your data requirements, whether it is for faster networking or for higher storage capacity
- 2× 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 16 bays
* HDD/SSDs, 10GbE network adapter cards, and expansion units are sold separately

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, DS1621+ 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 SOLUTIONO
- DS1621+ 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
* Synology Drive: Safeguard your computer with Synology Drive Client (Effortlessly perform real-time data backups and point-in-time file recovery)
* Active Backup for Microsoft 365 / G Suite: On-premise backup solution with a centralized dashboard (Optimize storage efficiency with single instancing and block-level deduplication technology)

POWERED BY SYNOLOGY DSM
- Central Management System: Manage multiple Synology NAS servers simultaneously on a centralized interface to increase business efficiency
- 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: Comprehensive built-in security tools are constantly updated to protect your devices against evolving threats
- Synology Drive: A versatile solution for file management and synchronization
- Surveillance Station: Complete surveillance solution for recording, monitoring, and management

WORKS BEST WITH SYNOLOGY SOLID-STATE DRIVES
- Engineered to handle intensive 24/7 workloads, Synology SSDs are designed to provide consistent high-performance

Hardware 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: 4GB DDR4 ECC SO-DIMM
- Memory Module Pre-installed: 4GB (4GB ×1)
- Total Memory Slots: 2
- Maximum Memory Capacity: 32GB (16GB ×2)

STORAGE
- Drive Bays: 6
- Maximum Drive Bays with Expansion Unit: 16 (DX517 ×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: 108TB
* Each internal volume (may consist of multiple drives) is expandable up to 108TB
- Hot Swappable Drive: Yes

EXTERNAL PORTS
- RJ-45 1GbE LAN Port: 4 (with Link Aggregation / Failover support)
- USB 3.0 Port: 3
- eSATA Port: 2

PCIe
- PCIe Expansion: 1× Gen3 x8 slot (x4 link)

FILE SYSTEM
- Internal Drives: Btrfs, EXT4
- External Drives: Btrfs, EXT4, EXT3, FAT, NTFS, HFS+, exFAT
* exFAT Access is purchased separately in Package Center

APPEARANCE
- Size (H×W×D): 166×282×243 mm
- Weight: 5.1 kg

OTHERS
- System Fan: 92×92 mm ×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: 25.2 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:
* 51.22 W (Access)
* 25.27 W (HDD Hibernation)
- British Thermal Unit:
* 174.77 BTU/hr (Access)
* 86.22 BTU/hr (HDD Hibernation)

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

CERTIFICATION
- FCC, CE, BSMI, EAC, CCC, KC, VCCI, RCM

ENVIRONMENT
- RoHS Compliant

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

OPTIONAL ACCESSORIES
- 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

DSM Specifications
STORAGE MANAGEMENT
- Maximum Internal Volume Number: 64
- SSD Read / Write Cache (White Paper): Yes
- SSD TRIM: Yes
- Supported RAID Type: Synology Hybrid RAID, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
- RAID Migration: Basic to RAID 1, Basic to RAID 5, RAID 1 to RAID 5, RAID 5 to RAID 6
- Volume Expansion with Larger HDDs: Synology Hybrid RAID, RAID 1, RAID 5, RAID 6, RAID 10
- Volume Expansion by Adding a HDD: Synology Hybrid RAID, JBOD, RAID 5, RAID 6
- Global Hot Spare Supported RAID Type: Synology Hybrid RAID, RAID 1, RAID 5, RAID 6, RAID 10

FILE SERVICES
- File Protocol: CIFS/AFP/NFS/FTP/WebDAV
- Maximum Concurrent CIFS/AFP/FTP Connections: 1.000
- Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion): 2.000
- Windows Access Control List (ACL) Integration: Yes
- NFS Kerberos Authentication: Yes

ACCOUNT & SHARED FOLDER
- Maximum Local User Accounts: 2.048
- Maximum Local Groups: 256
- Maximum Shared Folder: 512
- Maximum Shared Folder Sync Tasks: 16

HIGH AVAILABILITY
- Synology High Availability

LOG CENTER
- Syslog Events per Second: 800

VIRTUALIZATION
- VMware vSphere 6 with VAAI: Yes
- Windows Server 2016: Yes
- Windows Server 2019: Yes
- Citrix Ready: Yes
- OpenStack: Yes

Add-on Packages
- Antivirus by McAfee (Trial): Yes
- Central Management System: Yes
- Document Viewer: Yes
- exFAT Access (Optional): Yes
- Video Station: Yes

SYNOLOGY CHAT
- Maximum Users: 1.500

DOWNLOAD STATION
- Maximum Concurrent Download Tasks: 80

iSCSI MANAGER
- Maximum iSCSI Target Number: 128
- Maximum iSCSI LUN: 256
- iSCSI LUN Clone/Snapshot, Windows ODX: Yes

SYNOLOGY MailPlus/MailPlus SERVER
- Free Email Accounts: 5 (Licenses required for additional accounts)
- Maximum Number of Concurrent Users: 150
- Maximum Server Performance: 1.484.000 emails per day, approx. 45GB

MEDIA SERVER
- DLNA Compliance: Yes

MOMENTS
- Facial Recognition: Yes
- Subject Recognition: Yes
-Auto Color & Rotate: Yes
- Moments Select: Yes

SNAPSHOT REPLICATION
- Maximum Snapshots per Shared Folder: 1.024
- Maximum of System Snapshots: 65.536

SURVEILLANCE STATION
- Maximum IP cam (Licenses required): 40 (including 2 Free License)
- Total FPS (H.264):
* 1200 FPS @ 720p (1280×720)
* 1050 FPS @ 1080p (1920×1080)
* 600 FPS @ 3M (2048×1536)
* 440 FPS @ 5M (2591×1944)
* 320 FPS @ 4K (3840×2160)
- Total FPS (H.265):
* 1200 FPS @ 720p (1280×720)
* 1200 FPS @ 1080p (1920×1080)
* 1120 FPS @ 3M (2048×1536)
* 600 FPS @ 5M (2591×1944)
* 480 FPS @ 4K (3840×2160)

SYNOLOGY DRIVE
- Recommended Number of Hosted Files: 1.000.000 (applies to files indexed or hosted by Synology Drive (For file access through other standard protocols, refer to the File Services section above)
- Recommended Number of Concurrent Sync Clients: 550 (the number of connections that can be maintained when the recommended number of hosted files was reached)

SYNOLOGY OFFICE
- Maximum Users: 1.800

VIRTUAL MACHINE MANAGER
- Recommended Virtual Machine Instances: 8
- Recommended Virtual DSM Number (Licenses required): 8 (including 1 Free License)

VPN SERVER
- Maximum Connections: 30