Synology 2U Rackmount Redundant Power or Synology 12-Bay Quad-Core NAS? Which Synology Model to Buy
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You are comparing the synology rx1217rp redundant power expansion vs diskstation 12 bay. Both units are diskless and managed by Synology DSM. They share a black finish and fit standard rack widths. The main difference is their role. One is a standalone 12-bay server with a quad-core processor. The other is a 2U expansion chassis designed to add storage to an existing system. You must decide if you need a primary server or additional capacity.
Key differences
| Aspect | Synology 2U Rackmount Redundant Power Expansion Unit | Synology 12-Bay Quad-Core NAS |
|---|---|---|
| Form Factor | 2U Rackmount Expansion Unit | 12-Bay Tower/Rackable Server |
| Drive Bays | Expansion only (no bays listed) | 12-Bay |
| Processor | Not listed | Quad Core CPU |
| RAM Capacity | Not listed | 4GB DDR4 |
| Redundant Power | Yes | Not listed |
Which one should you choose?
Choose Synology 2U Rackmount Redundant Power Expansion Unit if
- You already have a Synology RackStation server and need to double your storage capacity without downtime.
- Your setup requires redundant power supplies to ensure continuous service uptime.
- You prefer a compact 2U chassis that integrates seamlessly with existing rack infrastructure.
Choose Synology 12-Bay Quad-Core NAS if
- You need a complete, standalone NAS solution with 12 drive bays.
- You require a quad-core processor and 4GB of RAM for independent operation.
- You want expandable storage that can reach 24 bays with an additional expansion unit.
Verdict: The DS2422+ is the better choice for users needing a primary server with processing power and 12 drive bays. The RX1217RP is strictly for expanding existing systems and lacks independent computing specs. Choose the DS2422+ if you are building a new storage foundation.
RX1217RP vs DS2422+ Key Specs
Form factor and height
The Synology RX1217RP is a 2U rackmount unit designed to sit flat in a server rack. It measures 3.46 inches in height, making it a low-profile expansion chassis. In contrast, the Synology DS2422+ is a taller, standalone tower or rack unit. It stands 16.5 inches high, occupying significantly more vertical space in a rack or on a desk. You need to consider your rack space carefully. If you are building a dense storage array, the RX1217RP allows you to stack multiple expansion units efficiently. The DS2422+ requires more vertical clearance but offers a complete server solution in one chassis.
Number of drive bays
The Synology DS2422+ is a primary storage server with 12 dedicated drive bays built into the main unit. This allows you to install 12 hard drives immediately for a robust storage pool. The Synology RX1217RP is diskless and contains zero drive bays. It is an expansion unit that must be connected to a compatible Synology server. It provides additional bays only when linked to a host. You cannot use the RX1217RP alone to store data. If you need immediate storage capacity without an existing server, the DS2422+ is the only viable option here. The RX1217RP adds capacity to an existing system.
RAM capacity
Memory is critical for caching and running virtual machines or containers. The Synology DS2422+ comes with 4GB of DDR4 RAM installed. It also supports upgrading to 32GB, which helps with heavy multitasking and read/write speeds. The specifications for the Synology RX1217RP do not list any RAM capacity. As an expansion chassis, it relies on the host server for processing and memory resources. It does not have its own memory modules. You benefit from the DS2422+ if you need local memory for performance. The RX1217RP adds no memory of its own to the system.
Processor capabilities
Processing power determines how fast the NAS handles data requests. The Synology DS2422+ features a Quad-Core CPU. This allows it to manage files, run applications, and handle network traffic independently. The data for the Synology RX1217RP does not mention a processor. This is expected, as it is a diskless expansion unit. It has no independent computing power and depends entirely on the connected server. You get full computing capability with the DS2422+. The RX1217RP is purely a storage expansion device with no local processing.
Power supply redundancy
Reliability is key for always-on storage. The Synology RX1217RP includes redundant power supplies. This means it has multiple power units to ensure service uptime if one fails. The specifications for the Synology DS2422+ do not mention redundant power supplies. It likely has a standard single power supply unit. If you are running critical data in a rack environment, the redundant power in the RX1217RP offers a safety net. However, the DS2422+ is a complete server that may have its own power reliability features not listed here. You gain redundancy with the RX1217RP expansion unit.
Choose the right Synology for your setup
Users needing more drive bays
The DS2422+ provides twelve drive bays in a single unit. This offers immediate storage capacity without requiring an existing chassis. Its quad-core processor and 4GB of RAM handle data operations efficiently. You can expand further by connecting a DX1222 unit later if needed.
Existing RackStation owners
The RX1217RP is a diskless expansion unit meant to attach to a compatible Synology RackStation. It adds redundant power supplies to maintain uptime. Its 2U form factor fits standard racks. It expands your existing volume online without downtime, rather than serving as a standalone server.
Those prioritizing performance specs
The DS2422+ lists specific read and write speeds up to 2,201 MB/s. It supports up to 32GB of RAM and NVMe SSD caching. These specs target high-throughput environments. The RX1217RP lacks these processing details as it relies on its host system for compute power.
The products compared
Synology 2U Rackmount Redundant Power Expansion Unit
Best for: expanding RackStation storage with redundant power
- Included Storage
- Diskless
- Dimensions
- 27.4 × 17 × 3.46 inches
- Weight
- 29.5 pounds
View on Amazon: Synology 2U Rackmount Redundant Power Expansion Unit Affiliate link
This is a diskless 2U rackmount expansion unit designed to add storage to your existing Synology RackStation. It features redundant power supplies to maintain service uptime during a power failure. The unit connects seamlessly for online volume expansion, allowing you to increase capacity without downtime. It measures 27.4 inches long and weighs 29.5 pounds. You manage the storage through Synology DiskStation Manager.
Pros
- Redundant power supplies ensure service uptime
- Plug-n-use design for seamless upgrade
- Online volume expansion on the fly
- Managed from Synology DiskStation Manager
Cons
- Sold as a diskless unit requiring separate drives
- Large footprint at 27.4 inches long
- Heavy build at 29.5 pounds
Good fit if
- You need redundant power for critical data
- You want to expand existing RackStation storage
- You require online volume expansion without downtime
Skip if
- You need a standalone NAS with built-in drives
- You are looking for a desktop tower model
- You want a compact 1U rack solution
Verdict: Synology RX1217RP 2U Rack Expansion Unit is a specialized expansion chassis for users who already own a Synology RackStation and need redundant power and additional drive bays. It fits IT professionals managing rack-mounted storage who prioritize uptime and seamless capacity growth.
Synology 12-Bay Quad-Core NAS
Best for: Expanding storage capacity and speed
- Drive Bays
- 12-Bay
- Processor
- Quad Core
- RAM Capacity
- 4GB DDR4
- Included Storage
- Diskless
- Dimensions
- 18.5 × 17 × 16.5 inches
- Weight
- 20.9 pounds
View on Amazon: Synology 12-Bay Quad-Core NAS Affiliate link
The Synology 12-Bay DS2422+ is a diskless NAS with a quad-core CPU and 4GB DDR4 RAM. It delivers up to 2,201 MB/s read and 1,383 MB/s write speeds. You can expand storage to 24 bays using a DX1222 unit. It supports up to 32 GB memory and 10/25GbE networking. This model suits users needing high capacity and performance in a rackmount-friendly form factor.
Pros
- Quad-core processor for efficient multitasking
- Supports up to 32 GB of RAM
- Expandable to 24 drive bays
- High sequential read and write speeds
Cons
- Only includes 4 GB of RAM by default
- Sold as a diskless unit
- Larger physical footprint than desktop models
Good fit if
- You need to scale storage beyond 12 drives
- You require high sequential data transfer rates
- You want to upgrade RAM for better performance
Skip if
- You prefer a pre-loaded drive configuration
- You need more than 4 GB of RAM without upgrading
- You require a compact desktop form factor
Verdict: Synology 12-Bay DS2422+ NAS is ideal for users who need expandable storage and high performance. It fits those planning to add more RAM or drives later.
Specifications side by side
| Spec | Synology 2U Rackmount Redundant Power Expansion Unit | Synology 12-Bay Quad-Core NAS |
|---|---|---|
| Drive Bays | not stated | 12-Bay |
| Processor | not stated | Quad Core |
| RAM Capacity | not stated | 4GB DDR4 |
| Included Storage | Diskless | Diskless |
| Number of Bays | not stated | 12-Bay |
| Processor Cores | not stated | Quad-Core |
| Dimensions | 27.4 × 17 × 3.46 inches | 18.5 × 17 × 16.5 inches |
| Weight | 29.5 pounds | 20.9 pounds |
| Size | 2U x 24" x 36" | 12-bay; 4GB DDR4 |
| Color | Black | Black |
| Model | RX1217RP | DS2422+ |
Frequently asked questions
Can the Synology RX1217RP operate as a standalone NAS?
No. The RX1217RP is designed as a redundant power expansion unit. It requires an existing Synology RackStation to function. It adds drive bays and power redundancy to your current setup. It does not run independently. You must connect it to a compatible host chassis to manage storage.
Does the Synology DS2422+ include internal RAM?
Yes. The DS2422+ comes with 4GB of DDR4 RAM installed. This memory supports data operations and improves performance. You can expand this capacity later by adding more modules. It is not an expansion chassis, so it includes its own processing components.
Is the Synology RX1217RP a 2U rackmount device?
Yes. The RX1217RP is a 2U rackmount unit. It measures 3.46 inches in height. This low profile allows it to fit flat in standard server racks. It is built for IT professionals who need seamless capacity growth and redundant power for their existing infrastructure.
How many drive bays does the DS2422+ have?
The DS2422+ features twelve drive bays. This provides immediate storage capacity in a single unit. You do not need an existing chassis to use it. The quad-core processor helps manage these drives efficiently. It is ideal for users planning to add more drives or RAM later.
What is the weight of the Synology RX1217RP?
The RX1217RP weighs 29.5 pounds. This weight reflects its robust construction for rack environments. It includes redundant power supplies and a sturdy metal chassis. The unit measures 27.4 inches in length and 17 inches in width. Plan your rack space accordingly for this hardware.
Can I add RAM to the Synology RX1217RP?
No. The RX1217RP is an expansion chassis. It does not contain its own processor or user-upgradable RAM slots. All processing and memory management are handled by the host RackStation it connects to. Its role is strictly to provide additional drive bays and power redundancy.
Is the Synology DS2422+ suitable for small offices?
Yes. The DS2422+ is a standalone NAS with a quad-core processor. It offers 12 drive bays and 4GB of RAM. This setup handles data operations efficiently for small to medium teams. It provides expandable storage without needing a separate expansion chassis. It fits well in office environments.
What color is the Synology RX1217RP?
The RX1217RP has a black finish. This color matches standard server rack aesthetics. It shares this black finish with the DS2422+. The design is practical for professional IT environments. The color does not affect performance but helps the unit blend into rack setups.