Fast storage with outstanding computing power

RS819 is a compact and scalable 4-bay rackmount NAS in a 1U form factor. With snapshot technology support, RS819 brings business workgroups simple yet comprehensive solutions to data management, sharing, synchronization and backup.

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CPU

64-bit quad-core 1.4 GHz

Memory

2GB DDR4

Network

Dual 1GbE LAN ports

High Performance

Over 224 MB/s encrypted reading performance

Meet the space-saving rackmount server for deployment

RS819 supports up to 8 drives when connecting with one RX418 expansion unit. Since both RS819 and RX418 are only 12 inches in depth, they can fit perfectly in a 2-post or wall mount rack.

  • Compact chassis design capable of fitting in a 2-post rack
  • The 2-post rack mount is easy to assemble and space-saving, allowing you to set up anywhere
  • Cost-efficient server deployment without unnecessary investment in rail kits and server facilities
Meet the space-saving rackmount server for deployment

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, RS819 supports the following protocols: AFP, FTP, iSCSI, NFS, SMB, and WebDAV.

Ultimate file management and sharing

Btrfs: Next generation storage efficiency

The Btrfs file system introduces cutting-edge storage technologies and optimized snapshots to prevent data corruption and reduce maintenance overhead. While ensuring high-level data integrity, it also offers flexible, efficient data protection and recovery tools.

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Btrfs: Next generation storage efficiency
Flexible Shared Folder/User Quota System provides comprehensive quota control on all user accounts and shared folders

Flexible Shared Folder/User Quota System provides comprehensive quota control on all user accounts and shared folders

Snapshot Replication provides schedulable and storage capacity-saving data protection with 256 shared folder backups and 4,096  system-wide snapshots

Snapshot Replication provides schedulable and storage capacity-saving data protection with 256 shared folder backups and 4,096  system-wide snapshots

File or folder level data restoration makes data recovery fast and flexible

File or folder level data restoration makes data recovery fast and flexible

Automatic file self-healing detects and recovers corrupted files without user intervention

Automatic file self-healing detects and recovers corrupted files without user intervention

Btrfs: Next generation storage efficiency mobile version

Digital asset protection

Powered by Synology DiskStation Manager (DSM), Synology NAS offers advanced security measures to protect against sudden data loss and potential security holes. Learn more

Security Advisor

Security Advisor

Analyze system settings, password strength and network preferences, and remove any possible malware.

AppArmor

AppArmor

A kernel-level enhancement that blocks malicious programs from accessing unauthorized system resources.

AES 256-bit encryption

AES 256-bit encryption

Encrypt shared folders and network data transmission to avoid unauthorized data access.

2-step verification

2-step verification

Prevent others from logging in to your DSM by generating a six-digit one-time password (OTP) on your mobile device.

Digital asset protection

Engineered for reliability, backed by Synology

RS819 is designed to reliably store your data and is backed by Synology's three-year hardware warranty. An optional two-year extended warranty is available in select regions for up to five years of coverage. Learn more

Engineered for reliability, backed by Synology

Powered by Synology DiskStation Manager

DSM UI

DSM UI

Award-winning operating system with an intuitive user interface and powerful capabilities.

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Public Cloud Integration

Public Cloud Integration

Back up and synchronize data easily between public cloud accounts and your NAS.

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Synology Drive

Synology Drive

Instantly access your NAS files across multiple devices whenever you want, wherever you are.

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All-in-one server

All-in-one server

Save additional investment by integrating various network services, web/mail services, management applications into your NAS.

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Snapshot Replication

Snapshot Replication

Schedulable and instantaneous data protection of shared folders and iSCSI LUNs for quick disaster recovery.

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Security

Security

Shield your Synology NAS from the most sophisticated threats with industry-leading security solutions.

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RackStation RS819

product RS819 front view photo
product RS819 back view photo
  • 1 Power button and indicator
  • 2 LAN indicator
  • 3 Drive status indicator
  • 4 Beep off button
  • 5 Status indicator
  • 6 Drive tray
  • 7 Console port
  • 8 System fan
  • 9 Power port
  • 10 1GbE RJ-45 port
  • 11 USB 3.0 port
  • 12 eSATA port
  • 13 Reset button
Hardware Specifications
CPU
CPU
CPU Model Realtek RTD1296
CPU Quantity 1
CPU Architecture 64-bit
CPU Frequency 4-core 1.4 GHz
Hardware Encryption Engine
Memory
Memory
System Memory 2 GB DDR4 non-ECC
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.
Storage
Storage
Drive Bays 4
Maximum Drive Bays with Expansion Unit 8 (RX418 x 1)
Compatible Drive Type* (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive
Notes "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
External Ports
RJ-45 1GbE LAN Port 2 (with Link Aggregation / Failover support)
USB 3.2 Gen 1 Port* 2
eSATA Port 1
Notes The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
File System
File System
Internal Drives
  • Btrfs
  • EXT4
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
Notes exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
Appearance
Appearance
Form Factor (RU) 1U
Size (Height x Width x Depth) 44 mm x 478 mm x 327.5 mm
Weight 4.34 kg
Rack Installation Support*
  • 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)
  • 2-post 19" rack (direct mounting)
Notes The rail kit is sold separately
Others
Others
System Fan 40 mm x 40 mm x 3 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Power Recovery
Noise Level* 28.9 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 100 W
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption* 28.31 W (Access)
10.1 W (HDD Hibernation)
British Thermal Unit 96.6 BTU/hr (Access)
34.46 BTU/hr (HDD Hibernation)
Notes Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Temperature
Temperature
Operating Temperature 5°C to 35°C (40°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH
Certification
Certification
  • FCC
  • CE
  • BSMI
  • EAC
  • CCC
  • KC
  • VCCI
  • RCM
Warranty
Warranty
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)
Environment
Environment
RoHS Compliant
Packaging Content
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Quick Installation Guide X 1
Optional Accessories
Optional Accessories
  • Expansion Units: RX418
  • Rail Kit Sliding: RKS-02
  • Rail Kit Mounted: RKM114*
  • VisualStation: VS360HD
  • Surveillance Device License Pack
Notes Certain items may not be available in your location. Please contact your local distributors for more information.
DSM Specifications
Maximum Single Volume Size* 108 TB
Maximum Internal Volume Number 64
SSD TRIM
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 (with Expansion Unit)
  • RAID 10 (with Expansion Unit)
Global Hot Spare Supported RAID Type
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6 (with Expansion Unit)
  • RAID 10 (with Expansion Unit)
Notes
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
File Protocol SMB/AFP/NFS/FTP/WebDAV
Maximum Concurrent SMB/AFP/FTP Connections 200
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Maximum Local User Accounts 2,048
Maximum Local Groups 256
Maximum Shared Folder 256
Maximum Shared Folder Sync Tasks 4
Maximum Hybrid Share Folders 5
Notes For more details about the maximum number of Hybrid Share folders, check this article.
Syslog Events per Second 400
Networking Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Google Chrome
  • Firefox
  • Microsoft Edge
  • Safari
Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes For an updated list of supported browser versions, check the DSM Technical Specifications.
Maximum Users 500
Notes When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
Download Station
Download Station
Maximum Concurrent Download Tasks 80
Maximum iSCSI Target Number 128
Maximum LUN 256
LUN Clone/Snapshot, Windows ODX
Notes iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
DLNA Compliance
Facial Recognition
Notes Photo Station and Synology Moments are succeeded by Synology Photos in DSM 7.0. For a features comparison, check this article.
Maximum Snapshots per Shared Folder 256
Maximum of System Snapshots 4,096
Maximum IP cam (Licenses required) 30 (including 2 Free License) (see all supported IP cameras)
Total FPS (H.264) 900 FPS @ 720p (1280x720)
300 FPS @ 1080p (1920x1080)
240 FPS @ 3M (2048x1536)
150 FPS @ 5M (2591x1944)
110 FPS @ 4K (3840x2160)
Total FPS (H.265) 900 FPS @ 720p (1280x720)
450 FPS @ 1080p (1920x1080)
360 FPS @ 3M (2048x1536)
250 FPS @ 5M (2591x1944)
180 FPS @ 4K (3840x2160)
Total FPS (MJPEG) 300 FPS @ 720p (1280x720)
200 FPS @ 1080p (1920x1080)
130 FPS @ 3M (2048x1536)
80 FPS @ 5M (2591x1944)
Notes
  • Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup.
  • Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
Recommended Number of Concurrent Sync Clients 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Recommended Number of Hosted Files 500,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Maximum Users 200
Notes
  • Multiple files were opened for testing and each file was edited by 30 users simultaneously.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Video Transcoding Group 2 (See more)
Maximum Connections 20

Notes:

  1. Model specifications are subject to change without prior notice.
  2. The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
  3. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
  4. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.