Synology 4-Bay Expandable Rackmount NAS or Synology 2-Bay 8TB NAS? Which Synology Model to Buy
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
You are comparing the synology 4 bay expandable rackmount NAS vs 2 bay 8tb NAS. Both units run Synology software for reliable file management. The main difference lies in capacity and form factor. One offers four bays with expansion potential in a rackmount chassis. The other provides a compact 2-bay setup with 8TB of storage included. Your choice depends on whether you prioritize raw capacity or immediate storage availability.
Key differences
| Aspect | Synology 4-Bay Expandable Rackmount NAS | Synology 2-Bay 8TB NAS |
|---|---|---|
| Drive Bays | 4-Bay | 2-Bay |
| Included Storage | Diskless | 8TB |
| Network Connectivity | Four 1GbE ports | 1 x RJ-45 1GbE |
| Processor | Not listed | Realtek RTD1619B Quad-Core |
| RAM Capacity | Not listed | 2 GB DDR4 |
Which one should you choose?
Choose Synology 4-Bay Expandable Rackmount NAS if
- You need to scale storage beyond four drives using expansion units.
- You require network redundancy with multiple 1GbE ports.
- You prefer a rackmount form factor for server room installation.
Choose Synology 2-Bay 8TB NAS if
- You want 8TB of storage included right out of the box.
- You need a compact desktop unit with a quad-core processor.
- You require USB 3.2 ports for quick peripheral connections.
Verdict: Choose the RS822+ if you need expandable capacity and enterprise-grade network features. Pick the DS223 bundle if you want immediate 8TB storage in a compact desktop form. Both models deliver reliable Synology NAS performance for their respective use cases.
Capacity and Form Factor Comparison
Number of drive bays
The Synology 4-Bay Expandable Rackmount NAS provides four drive bays for storage. This model is diskless, meaning you must purchase drives separately. The Synology 2-Bay 8TB NAS comes with two drive bays. It includes 8TB of storage pre-installed. If you need more space, the 4-Bay model allows expansion. You can add one Synology RX418 Expansion Unit to reach eight drives total. The 2-Bay model is limited to two drives. Choose the 4-Bay unit for higher capacity potential. Pick the 2-Bay unit for immediate storage without extra drive purchases.
Form factor and size
The Synology 4-Bay Expandable Rackmount NAS is a large, rackmount device. It measures 17.2 inches wide, 10 inches high, and 19.3 inches long. It weighs 18.7 pounds. This size is designed for server racks or dedicated equipment rooms. The Synology 2-Bay 8TB NAS is much smaller. It measures 4.25 inches wide, 6.5 inches high, and 9.17 inches long. It weighs only 6.68 pounds. This compact form factor fits easily on a desk or shelf. If you have limited space, the 2-Bay model is the clear choice. The 4-Bay model requires significant physical room.
Network connectivity options
The Synology 4-Bay Expandable Rackmount NAS features four 1GbE ports. This setup supports network failover and load balancing for better reliability. You can also add optional 10/25GbE expansion cards for faster speeds. The Synology 2-Bay 8TB NAS has only one RJ-45 1GbE LAN port. It lacks multiple ports for redundancy or bonding. If you need high availability or increased bandwidth, the 4-Bay model offers superior networking. The 2-Bay model is suitable for basic single-connection setups. The 4-Bay unit provides more flexibility for network configuration.
RAM capacity
The Synology 2-Bay 8TB NAS includes 2 GB of DDR4 non-ECC RAM. This memory supports system operations and caching. The provided data for the Synology 4-Bay Expandable Rackmount NAS does not list its RAM capacity. Without this specification, a direct comparison is not possible. You may need to check the official Synology website for the 4-Bay model's memory details. For the 2-Bay unit, 2 GB is standard for entry-level performance. If RAM is critical for your workload, verify the 4-Bay specs separately.
Processor specifications
The Synology 2-Bay 8TB NAS uses a Realtek RTD1619B quad-core processor. It runs at 1.7 GHz. This chip handles basic file management and media transcoding. The provided data for the Synology 4-Bay Expandable Rackmount NAS does not specify its processor. You cannot compare CPU power directly from this information. The 2-Bay unit has a defined quad-core architecture. If processing speed is a priority, the 2-Bay model offers known specs. The 4-Bay model likely has a more powerful CPU, but this is not confirmed in the data.
Which Synology NAS fits your needs
Users needing expandable rackmount storage
The Synology RS822+ offers four drive bays and supports expansion to eight drives via an RX418 unit. It includes four 1GbE ports for network failover and load balancing. You can boost random IOPS with optional SSD cache. This model is diskless, so you select your own drives. It is designed for rackmount installation in professional environments.
Users wanting pre-installed 8TB storage
The Synology DS223 comes with 8TB of storage pre-installed, eliminating the need to buy drives separately. It features a Realtek RTD1619B quad-core processor and 2 GB of DDR4 RAM. The unit includes one 1GbE LAN port and three USB 3.2 Gen 1 ports. It supports hot-swapping drives for easy maintenance. This bundle is ready to use immediately.
Users requiring high throughput speeds
The RS822+ provides over 2,103 MB/s sequential read and 1,074 MB/s write throughput. This supports stable data transfers for demanding tasks. The four network ports allow for flexible connectivity options, with optional 10/25GbE expansions available. You can further enhance performance by adding SSD cache. This model is ideal for users prioritizing speed and scalability over pre-installed capacity.
The products compared
Synology 4-Bay Expandable Rackmount NAS
Best for: Expandable rackmount storage with network redundancy
- Drive Bays
- 4-Bay
- Network Connectivity
- 4 x 1GbE
- RAM Capacity
- 32GB
- Included Storage
- Diskless
- Dimensions
- 19.3 × 17.2 × 10 inches
- Weight
- 18.7 pounds
View on Amazon: Synology 4-Bay Expandable Rackmount NAS Affiliate link
The Synology RS822+ is a 4-bay rackmount NAS designed for expandable storage. It offers over 2,103 MB/s read speeds and includes four 1GbE ports for network redundancy. You can scale to eight drives using an expansion unit. This diskless unit suits users needing robust throughput and flexible scaling in a rack environment.
Pros
- Sequential read speeds over 2,103 MB/s
- Four 1GbE ports for failover and load balancing
- Expandable to 8 drives via RX418 unit
- Supports optional SSD cache for IOPS
Cons
- Sold diskless with no included storage
- Lacks 10/25GbE ports in base configuration
- Bulkier 19.3-inch depth than desktop models
Good fit if
- You need to scale storage up to 8 drives
- You require network failover with multiple Ethernet ports
- You have a rackmount chassis available
Skip if
- You prefer a plug-and-play unit with pre-installed drives
- You need high-speed 10GbE networking without add-ons
- You are limited to a small desktop footprint
Verdict: Synology RS822+ 4-Bay Rackmount NAS fits users who need expandable rack storage with strong sequential throughput and network redundancy.
Synology 2-Bay 8TB NAS
Best for: Small offices needing simple desktop storage
- Drive Bays
- 2-Bay
- Network Connectivity
- 1 x RJ-45 1GbE
- Processor
- Realtek RTD1619B
- RAM Capacity
- 2 GB DDR4
- Included Storage
- 8TB
- Processor Cores
- Quad-Core
View on Amazon: Synology 2-Bay 8TB NAS Affiliate link
The Synology DS223 is a 2-bay NAS bundled with 8TB of storage. It uses a Realtek RTD1619B quad-core processor and 2GB of DDR4 RAM. You get one 1GbE LAN port and three USB 3.2 Gen 1 ports. This setup supports hot-swappable drives for easy maintenance. It suits users who need reliable storage without rackmount complexity.
Pros
- Includes 8TB of pre-installed storage
- Quad-core 1.7 GHz processor
- Three USB 3.2 Gen 1 ports
- Hot-swappable drive bays
Cons
- Only one 1GbE LAN port
- Limited to 2GB of system RAM
- Desktop form factor, not rackmount
Good fit if
- You want a ready-to-use storage solution
- You prefer desktop placement over rackmount
- You need basic 1GbE connectivity
Skip if
- You require 10GbE networking speeds
- You need expandable rackmount installation
- You plan to run heavy virtualization tasks
Verdict: Synology DS223 2-Bay NAS with 8TB Storage is a solid entry-level option for home offices or small studios. It fits users who value simplicity and pre-installed capacity over high-end networking or expansion options.
Specifications side by side
| Spec | Synology 4-Bay Expandable Rackmount NAS | Synology 2-Bay 8TB NAS |
|---|---|---|
| Drive Bays | 4-Bay | 2-Bay |
| Network Connectivity | 4 x 1GbE | 1 x RJ-45 1GbE |
| Processor | not stated | Realtek RTD1619B |
| RAM Capacity | 32GB | 2 GB DDR4 |
| Included Storage | Diskless | 8TB |
| Number of Bays | 4-Bay | 2-Bay |
| Size | RS822+ | 8TB |
| Processor Cores | not stated | Quad-Core |
| Dimensions | 19.3 × 17.2 × 10 inches | 9.17 × 4.25 × 6.5 inches |
| Weight | 18.7 pounds | 6.68 pounds |
| Color | Not Available | Seagate IronWolf |
| Model | RS822+ | not stated |
Frequently asked questions
Does the Synology RS822+ come with hard drives installed?
No, the Synology RS822+ is a diskless unit. You must purchase hard drives separately to populate its four bays. This approach allows you to select specific drive models that match your performance needs and budget. The 2-Bay 8TB NAS, however, includes pre-installed storage for immediate use.
Can I add more storage to the 4-bay rackmount model?
Yes, the Synology RS822+ supports expansion. It can connect to an RX418 expansion unit to increase capacity up to eight drives total. This makes it suitable for users who anticipate significant data growth. The 2-Bay model offers fixed capacity with no expansion chassis support.
Is the 4-bay NAS suitable for professional rack installation?
Yes, the Synology RS822+ is designed for rackmount environments. It measures 17.2 inches wide and 10 inches high, fitting standard server racks. Its 18.7-pound weight provides stability. The 2-Bay NAS is a desktop unit, measuring 4.25 inches wide, intended for desk placement rather than rack mounting.
What network capabilities does the 4-bay model offer?
The Synology RS822+ includes four 1GbE ports. This setup allows for network redundancy and load balancing, enhancing reliability for critical data. The 2-Bay NAS features a single 1GbE port. It handles standard network traffic but lacks the failover options available in the rackmount version.
How much RAM does the 2-Bay NAS have?
The Synology DS223 2-Bay NAS comes with 2GB of RAM. This capacity supports basic file management and light multitasking for small offices. The 4-Bay RS822+ is built for higher performance with network redundancy, though specific RAM details are not listed in its provided specifications.
Which model is better for a home office?
The Synology DS223 2-Bay NAS is ideal for home offices. It offers simplicity with pre-installed 8TB storage and a compact desktop footprint. The 4-Bay RS822+ is better for users needing expandable rack storage and strong sequential throughput, which may be excessive for typical home office tasks.