Synology RS3618xs is a reliable, superior-performance network-attached storage solution for large-scale enterprises with demanding business applications. It simplifies data management, optimizes virtualization environments, and rapidly expands storage capacity with minimal time investment in setup and maintenance.
quad-core up to 2.7GHz
8GB DDR4 ECC UDIMM, up to 64GB
4 x 1GbE port, optional 10GbE NIC support
Up to 36 drives with RX1217/RX1217RP
PCIe 3.0 slots allow for faster networking options as you expand your infrastructure. Together with the built-in quad Gigabit ports, RS3618xs offers comprehensive connectivity options for link aggregation and failover configurations.
SRS provides free advance replacement units as early as the next business day in selected regions, maximizing the service uptime for your mission-critical storage and ensuring your business continuity. Learn more
RS3618xs integrates various backup applications into an intuitive user interface, offering durable storage technologies to safeguard your valuable data on any device.
Centralize backup tasks for VMware, Windows, and file servers. Restore whatever you want fast and reliably when needed.
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.
Safeguard your computer with Synology Drive Client. Effortlessly perform real-time data backups and point-in-time file recovery.
On-premise backup solution with a centralized dashboard. Optimize storage efficiency with single instancing and block-level deduplication technology.
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.
The Btrfs file system introduces advanced 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. Learn more
Conveniently manage your fleet of Synology NAS from a centralized console.
Schedulable and instantaneous data protection for shared folders and iSCSI LUNs for disaster prevention.
Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
Secure, reliable, and private mail server solution with an intuitive and modern mail client.
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Instantly access your NAS files across multiple devices whenever you want, wherever you are.
Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.1
Storage drives are sold separately. Refer to the compatibility list for compatible devices.
Hardware Specifications |
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CPU |
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CPU
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CPU Model | Intel Xeon D-1521 |
| CPU Quantity | 1 | |
| CPU Architecture | 64-bit | |
| CPU Frequency | 4-core 2.4 (base) / 2.7 (turbo) GHz | |
| Hardware Encryption Engine (AES-NI) | ||
Memory |
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Memory
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System Memory | 8 GB DDR4 ECC UDIMM |
| Memory Module Pre-installed | 8 GB (8 GB x 1) | |
| Total Memory Slots | 4 | |
| Maximum Memory Capacity | 64 GB (16 GB x 4) | |
| Notes |
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Storage |
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Storage
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Drive Bays | 12 |
| Maximum Drive Bays with Expansion Unit | 36 (RX1217/RX1217RP x 2) | |
| Compatible Drive Type* (See all supported drives) |
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| 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 |
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External Ports
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RJ-45 1GbE LAN Port | 4 (with Link Aggregation / Failover support) |
| USB 3.2 Gen 1 Port* | 2 | |
| Expansion Port | 2 | |
| Notes | The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. | |
PCIe |
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PCIe
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PCIe Expansion | 2 x Gen3 x8 slots (x8 link) |
File System |
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File System
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Internal Drives |
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| External Drives |
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| 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 |
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Appearance
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Form Factor (RU) | 2U |
| Size (Height x Width x Depth) | 88 mm x 482 mm x 724 mm | |
| Weight | 14.5 kg | |
| Rack Installation Support* | 4-post 19" rack (Synology Rail Kit - RKS-02) | |
| Notes | The rail kit is sold separately | |
Others |
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Others
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System Fan | 80 mm x 80 mm x 4 pcs |
| Fan Speed Mode |
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| Easy Replacement System Fan | ||
| Power Recovery | ||
| Noise Level* | 50.2 dB(A) | |
| Scheduled Power On / Off | ||
| Wake on LAN / WAN | ||
| Power Supply Unit / Adapter | 500 W | |
| AC Input Power Voltage | 100V to 240V AC | |
| Power Frequency | 50/60 Hz, Single Phase | |
| Power Consumption |
142.76 W (Access) 55.05 W (HDD Hibernation) |
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| British Thermal Unit |
487.12 BTU/hr (Access) 187.84 BTU/hr (HDD Hibernation) |
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| Notes |
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Temperature |
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Temperature
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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 |
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Certification
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Warranty |
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Warranty
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5 Years | |
| Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | |
Environment |
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Environment
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RoHS Compliant | |
Packaging Content |
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Packaging Content
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Optional Accessories |
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Optional Accessories
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| Notes | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. | |
DSM Specifications |
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| Maximum Single Volume Size* |
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| Maximum Internal Volume Number | 128 | |
| SSD Read / Write Cache (White Paper) | ||
| SSD TRIM | ||
| RAID Group | ||
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| Notes |
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| File Protocol | SMB/AFP/NFS/FTP/WebDAV | |
| Maximum Concurrent SMB/AFP/FTP Connections | 2,000 | |
| Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 10,000 | |
| Windows Access Control List (ACL) Integration | ||
| NFS Kerberos Authentication | ||
| Notes |
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| Maximum Local User Accounts | 16,000 | |
| Maximum Local Groups | 512 | |
| Maximum Shared Folder | 512 | |
| Maximum Shared Folder Sync Tasks | 32 | |
| Hybrid Share Folder Number | 15 | |
| Folder and Package Backup | ||
| Entire System Backup | ||
| Notes | Full-system backup requires DSM 7.2 or later. | |
| Synology High Availability | ||
| Syslog Events per Second | 3,000 | |
Virtualization |
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Virtualization
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VMware ESXi 6.5 and VAAI | |
| Windows Server 2012 | ||
| Windows Server 2012 R2 | ||
| Windows Server 2016 | ||
| Windows Server 2019 | ||
| Citrix Ready | ||
| OpenStack | ||
| Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
| Supported Browsers |
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| 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. | |
Add-on Packages view the complete package list |
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Antivirus by McAfee (Trial) |
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Antivirus by McAfee (Trial)
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| Maximum Users | 4,000 | |
| Maximum Number of Concurrent Users | 500 | |
| Notes | When applicable, tested systems are configured with maximum memory and set to allow the maximum number of connections. | |
Document Viewer |
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Document Viewer
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Download Station |
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Download Station
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| Maximum Concurrent Download Tasks | 80 | |
| Maximum iSCSI Target Number | 256 | |
| Maximum LUN | 512 | |
| LUN Clone/Snapshot, Windows ODX | ||
| Notes | iSCSI Manager has been renamed to SAN Manager in DSM 7.0. | |
| Free Email Accounts | 5 (Licenses required for additional accounts) | |
| Maximum Number of Concurrent Users | 500 | |
| Maximum Server Performance | 3,595,000 emails per day, approx. 109GB | |
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| DLNA Compliance | ||
| Facial Recognition | ||
| Object Recognition | ||
| Maximum Snapshots per Shared Folder | 1,024 | |
| Maximum of System Snapshots | 65,536 | |
| Maximum IP cam (Licenses required) | 75 (including 2 Free License) (see all supported IP cameras) | |
| Total FPS (H.264) |
2250 FPS @ 720p (1280x720) 2100 FPS @ 1080p (1920x1080) 1500 FPS @ 3M (2048x1536) 900 FPS @ 5M (2591x1944) 550 FPS @ 4K (3840x2160) |
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| Total FPS (H.265) |
2250 FPS @ 720p (1280x720) 2250 FPS @ 1080p (1920x1080) 2250 FPS @ 3M (2048x1536) 1500 FPS @ 5M (2591x1944) 900 FPS @ 4K (3840x2160) |
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| Notes |
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| Recommended Number of Concurrent Sync Clients | 1,800 (the number of connections that can be maintained when the recommended number of hosted files was reached) | |
| Recommended Number of Hosted Files | 50,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) | |
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| Maximum Users | 2,900 | |
| Notes |
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| Video Transcoding | Group 1 - Type 1 (See more) | |
| Maximum Transcoding Channel Number | 1 channel, 30 FPS @ 1080p(1920×1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1 | |
| Recommended Virtual Machine Instances | 8 (Learn more) | |
| Recommended Virtual DSM Number (Licenses required) | 8 (including 1 Free License) | |
| Notes | The specifications vary depending on system configuration and memory size. | |
| Maximum Connections | 60 | |
