Synology RS818+ 4-Bay 1U Rackmount NAS

The Synology RS818+ is a compact and reliable 4-bay 1U rackmount NAS designed for small and medium-sized businesses that need centralized storage, efficient data management, network file sharing, backup, and scalable storage capabilities. Combining a quad-core Intel Atom processor, expandable DDR3L memory, four Gigabit Ethernet ports, hot-swappable drive bays, and PCIe expansion, the RS818+ provides a flexible storage platform for professional IT environments.

Designed in a space-efficient 1U rackmount chassis, the Synology RS818+ can be installed in standard server racks and communication cabinets where rack space is limited. Its four drive bays support both 3.5-inch and 2.5-inch SATA HDDs and SSDs, giving administrators flexibility when selecting storage media for different workloads.

The RS818+ is also designed with expansion in mind. Its PCIe 2.0 slot supports compatible high-performance network interface cards, including an optional 10GbE network card, while the dedicated expansion port allows the system to connect to a compatible Synology expansion unit for additional storage capacity.

Synology RS818+ Key Features

The Synology RS818+ 4-Bay NAS combines compact rackmount design with professional storage and networking capabilities.

• 4 × 3.5″/2.5″ SATA drive bays
• Support for SATA HDDs and SSDs
• Hot-swappable drive bays
• Intel Atom C2538 Quad-Core 2.4GHz processor
• 2GB DDR3L Non-ECC SO-DIMM memory
• Memory expandable up to 16GB
• 4 × Gigabit RJ-45 LAN ports
• Support for Link Aggregation and failover
• PCIe 2.0 x8 slot with x4 link
• Support for compatible 10GbE network interface cards
• 2 × USB 3.0 ports
• 1 × expansion port
• 1U rackmount form factor
• Support for Btrfs and ext4
• Support for multiple RAID configurations
• Compatible with Synology DSM
• Optional expansion using Synology RX418
• Hardware encryption engine with AES-NI

4-Bay Storage Architecture

One of the most important features of the Synology RS818+ is its four-bay storage architecture. The system supports up to four 3.5-inch or 2.5-inch SATA HDDs or SSDs, allowing organizations to configure storage according to their capacity and performance requirements.

The ability to use both HDDs and SSDs provides flexibility when planning a storage environment. High-capacity hard drives can be used where storage capacity is the main priority, while SSDs can be selected for workloads that benefit from faster storage media.

The four-bay design also allows administrators to configure supported RAID levels and select an appropriate balance between usable capacity, redundancy, and performance.

For organizations that need more storage than the four internal bays provide, the RS818+ can be connected to a Synology RX418 expansion unit, allowing the overall storage configuration to reach up to eight drives.

Hot-Swappable Drive Bays

The Synology RS818+ supports hot-swappable drives, making storage maintenance more convenient in professional environments.

Hot-swappable drive bays can simplify the process of replacing a failed or defective compatible drive without requiring the entire NAS to be removed from operation.

For businesses that depend on centralized storage, simplified drive maintenance can help reduce downtime and make storage administration more efficient.

The combination of four drive bays and hot-swap functionality makes the RS818+ suitable for organizations that need a compact rackmount storage solution while maintaining convenient access to their storage hardware.

Intel Atom Quad-Core Processor

The Synology RS818+ is powered by an Intel Atom C2538 Quad-Core processor running at 2.4GHz.

The quad-core processor provides the computing foundation for the NAS and its storage, networking, backup, and file-management services.

Synology designed the RS818+ as a high-performance rackmount NAS for small and medium-sized businesses. The company reported read performance exceeding 1,099 MB/s in its testing of the RS818+/RS818RP+ platform. Actual performance can vary depending on drive configuration, RAID type, network environment, workload, and other factors.

The processor also includes an AES-NI hardware encryption engine, providing hardware-assisted encryption capabilities for supported workloads.

Expandable DDR3L Memory

The RS818+ comes with 2GB of DDR3L Non-ECC SO-DIMM memory. The system supports memory expansion up to 16GB using two 8GB SO-DIMM modules.

Expandable memory gives organizations additional flexibility as their storage services and workloads grow.

A NAS can handle numerous simultaneous tasks, including file sharing, backup operations, synchronization, network services, and other supported applications. Increasing system memory can therefore be useful when additional resources are required.

The RS818+ uses non-ECC DDR3L memory, which is an important distinction from some enterprise storage systems that use ECC memory.

Four Gigabit Ethernet Ports

The Synology RS818+ includes four 1GbE RJ-45 network ports, providing multiple network interfaces for connecting the NAS to an existing Ethernet infrastructure.

Multiple network ports provide flexibility for different network configurations. Synology specifically states that the RS818+ supports Link Aggregation and failover through its four Gigabit Ethernet interfaces.

Link Aggregation can combine multiple network connections to increase available network bandwidth and provide additional connectivity options when supported by the network infrastructure.

Failover, meanwhile, can provide an additional network connection path in supported configurations.

This makes the four-port network architecture useful for business environments where network availability and connectivity flexibility are important.

Optional 10GbE Network Expansion

For organizations that require higher network bandwidth, the Synology RS818+ includes a PCIe 2.0 x8 slot operating with an x4 link that supports compatible high-performance network interface cards. Synology specifically identifies support for an optional 10GbE network card.

This is an important expansion capability because the standard four Gigabit Ethernet ports may not be sufficient for every high-performance storage workload.

By adding a compatible 10GbE network interface, businesses can build a faster connection between the NAS and their network infrastructure, subject to the capabilities of the installed card, switch, cabling, storage configuration, and workload.

The PCIe expansion capability therefore provides the RS818+ with a useful upgrade path without requiring replacement of the entire NAS.

PCIe Expansion Capability

The PCIe expansion slot is one of the key hardware features of the Synology RS818+.

The system provides one PCIe 2.0 x8 slot with a x4 link, designed to support compatible add-on cards. Synology specifically highlights high-performance network interface card support.

This makes the RS818+ more flexible than a storage system with fixed networking interfaces.

Organizations can use the supported expansion capability to adapt the NAS to their network requirements, particularly when higher-speed Ethernet connectivity is needed.

Storage Expansion with RX418

The Synology RS818+ can be expanded using the Synology RX418 expansion unit. Synology states that the combination can provide support for up to eight drives.

This expansion capability is useful for businesses whose storage requirements may grow over time.

Instead of immediately moving to a larger NAS platform, organizations can start with the four internal drive bays and add an expansion unit when additional storage capacity becomes necessary.

This provides a scalable approach to centralized data storage and can help organizations plan storage investment according to their growth requirements.

RAID Support

The Synology RS818+ supports a variety of storage configurations, including Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, and Synology Hybrid RAID (SHR). Synology’s documentation also specifies that SHR supports up to two-disk fault tolerance.

Different RAID configurations provide different combinations of capacity, performance, and redundancy.

For example, RAID 1 provides mirroring between drives, while RAID 5 and RAID 6 use parity to provide fault tolerance while making more storage capacity available for data.

RAID selection should always be based on the organization’s workload, capacity requirements, redundancy requirements, and backup strategy.

It is also important to remember that RAID is not a replacement for an independent backup solution.

Btrfs and ext4 File Systems

The RS818+ supports Btrfs and ext4 as internal file systems.

Btrfs provides advanced data-management capabilities within the Synology ecosystem, while ext4 offers a mature and widely used Linux file system option.

The choice between available file systems can depend on the organization’s requirements, supported features, and intended storage configuration.

Synology’s use of Btrfs in compatible systems provides features designed to help improve data protection and management, making it particularly relevant for business storage environments.

Synology DiskStation Manager

The RS818+ runs Synology DiskStation Manager (DSM), Synology’s operating system for its NAS platforms. Synology identifies DSM as the operating system of the RS818+ in its official Download Center.

DSM provides the software environment used to configure storage, manage users and permissions, monitor the NAS, manage network services, and deploy supported applications.

Synology positions the RS818+ as a centralized storage platform that can support applications such as file sharing, backup, and collaboration tools.

This software ecosystem is one of the important reasons why Synology NAS systems are widely used for centralized business data management.

Business File Sharing and Centralized Storage

The Synology RS818+ 4-Bay NAS can serve as a centralized storage platform for organizations that need shared access to files and business data.

Centralizing data on a dedicated NAS can simplify storage administration and provide a common location for authorized users to access shared resources.

The system supports multiple network services through DSM and can be integrated into business IT environments according to the organization’s requirements.

With four Gigabit Ethernet ports and optional 10GbE expansion, the RS818+ can also be integrated into different network architectures.

Backup and Data Protection

A NAS can play an important role in a business backup strategy by providing centralized storage for backup copies and organizational data.

The RS818+ offers multiple storage configurations, hot-swappable drives, RAID support, and DSM-based backup applications, giving businesses a platform for organizing and protecting their data.

Synology also designed the RS818+ to work with expansion storage, allowing organizations to increase available capacity as their backup requirements grow.

Businesses should still maintain an appropriate backup strategy with independent copies of critical information.

Virtualization Integration

Synology states that the RS818+/RS818RP+ platform is certified for integration with VMware, Citrix, Microsoft Hyper-V, and OpenStack Cinder environments.

This makes the RS818+ relevant to organizations that use virtualization as part of their IT infrastructure.

Centralized network storage can be useful for virtualized environments where multiple systems require access to shared storage resources.

The available networking and PCIe expansion capabilities can also provide flexibility when building a storage network for supported virtualization workloads.

Compact 1U Rackmount Design

The Synology RS818+ is designed in a 1U rackmount form factor, making it suitable for server rooms, data centers, and business communication cabinets where rack space is limited.

The official specifications list dimensions of 44 × 430.5 × 457.6 mm, excluding the rack mounting kits. With server ears, the dimensions are 44 × 480 × 492.6 mm. The listed net weight is 6.21 kg.

The compact chassis allows organizations to deploy centralized storage without occupying the space required by larger rackmount storage systems.

Cooling and Operating Environment

The RS818+ uses three 40 × 40 × 20 mm system fans to provide cooling for the rackmount chassis.

Synology specifies an operating temperature range of 5°C to 35°C in the current datasheet, with a relative humidity range of 5% to 95% RH. The hardware guide also documents environmental requirements for installation and operation.

For professional deployments, the NAS should be installed in an environment that meets the manufacturer’s temperature, humidity, airflow, and rack requirements.

Power and Energy Management

The RS818+ accepts 100V to 240V AC input power at 50/60Hz single-phase frequency.

The system also supports features such as scheduled power on/off, Wake on LAN/WAN, and HDD hibernation, providing administrators with additional options for managing system operation and power usage.

These capabilities can be useful in business environments where storage availability needs to be balanced with operational and energy-management requirements.

USB and Expansion Connectivity

The RS818+ includes two USB 3.0 ports for connecting supported external devices and one dedicated expansion port for compatible Synology expansion hardware.

The expansion port is particularly important because it enables the RS818+ to connect with the Synology RX418 expansion unit.

The USB interfaces provide additional connectivity for supported peripherals and external storage devices.

Synology RS818+ Specifications

These specifications are based on Synology’s official RS818+ datasheet and hardware documentation.

Why Choose the Synology RS818+?

The Synology RS818+ is a practical choice for businesses looking for a compact 4-bay rackmount NAS with expandable storage and flexible networking.

Its combination of a quad-core processor, expandable memory, four Gigabit Ethernet ports, PCIe expansion, hot-swappable drive bays, and support for 3.5-inch and 2.5-inch SATA drives gives organizations a versatile foundation for centralized storage.

The ability to add a compatible 10GbE network card is particularly useful for organizations whose network infrastructure requires more bandwidth than the built-in Gigabit interfaces can provide.

The option to connect the RX418 expansion unit also gives businesses a straightforward path to increase their available drive capacity as storage requirements grow.

Synology RS818+ for Small and Medium-Sized Businesses

Synology introduced the RS818+ as a 1U 4-bay rackmount NAS for small and medium-sized businesses, with a focus on storage performance and scalability.

Its rackmount design makes it suitable for organizations that already maintain server racks and want to centralize storage alongside their existing networking and computing infrastructure.

The four-bay architecture provides a useful starting point for business storage, while RAID support and optional expansion help organizations adapt the system to changing requirements.

Conclusion

The Synology RS818+ is a compact 4-Bay 1U Rackmount NAS designed for professional business storage environments. It combines an Intel Atom C2538 Quad-Core 2.4GHz processor, 2GB DDR3L memory expandable up to 16GB, four Gigabit Ethernet ports, hot-swappable SATA drive bays, and PCIe expansion for compatible high-performance network cards.

Its support for 3.5-inch and 2.5-inch SATA HDDs and SSDs, multiple RAID configurations, Btrfs and ext4 file systems, and Synology DSM makes it suitable for centralized file storage, backup, data management, and supported virtualization environments.

For organizations searching for a Synology 4-Bay Rackmount NAS, Synology RS818+ 4-Bay NAS, or Synology 1U NAS with 10GbE expansion support, the RS818+ offers a compact and expandable storage platform that can integrate into professional rack-based IT infrastructure.

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