Main trade-off
Synology DiskStation DS225+
No onboard M.2 slots are available for a separate SSD pool.
Head-to-head
Synology DS225+ vs TerraMaster F2-425 Plus: Faster networking does not enlarge the two-drive mirror
The short answer
Choose DS225+ when the job is a two-drive archive within Synology DSM and its documented backup workflow. Choose F2-425 Plus when separate NVMe storage, 5GbE links or 8GB supplied memory are requirements. Both have two SATA bays, so the faster TerraMaster hardware does not by itself increase a two-drive mirror's protected capacity.
Before you choose
The reasoning and the trade-offs
An SSD application pool should not displace the archive
DS225+ has no M.2 slots, so using internal SATA SSDs consumes the same two bays intended for hard drives. F2-425 Plus can keep a two-hard-drive mirror and add a separate two-SSD NVMe mirror, with one M.2 slot left.
What this is based on
DS225+ has two SATA and zero M.2 slots. TerraMaster has two SATA and three M.2 slots. A two-SSD mirror needs two compatible slots.
Main trade-off
TerraMaster F2-425 Plus N150 8GB
TOS is a different application and backup environment from DSM.
Synology DiskStation DS225+
- Choose it for
- Build a two-drive archive around Synology DSM
- Keep a simple hard-drive storage plan without NVMe pools
- Main trade-off
- No onboard M.2 slots are available for a separate SSD pool.
TerraMaster F2-425 Plus N150 8GB
- Choose it for
- Add SSD application storage without consuming SATA bays
- Use included 5GbE and 8GB memory
- Main trade-off
- TOS is a different application and backup environment from DSM.
About this comparison
Compare DS225+ and the N150 F2-425 Plus for a family archive, a separate SSD application pool and a planned 5GbE office connection.
Choose DS225+ when the job is a two-drive archive within Synology DSM and its documented backup workflow. Choose F2-425 Plus when separate NVMe storage, 5GbE links or 8GB supplied memory are requirements. Both have two SATA bays, so the faster TerraMaster hardware does not by itself increase a two-drive mirror's protected capacity.
Winner by situation
Start with what you need it to do
Keep a hard-drive mirror plus an onboard NVMe mirror
DS225+ has no M.2 slots. TerraMaster can hold both drive pairs.
- Synology DiskStation DS225+
- Not suitable
- TerraMaster F2-425 Plus N150 8GB
- Better fit
Run software with a documented 8GB memory minimum
The 8GB requirement exceeds DS225+'s 6GB official ceiling.
- Synology DiskStation DS225+
- Not suitable
- TerraMaster F2-425 Plus N150 8GB
- Better fit
Stay with a Synology DSM backup workflow
TerraMaster uses TOS, so the workflow and migration need separate validation.
- Synology DiskStation DS225+
- Better fit
- TerraMaster F2-425 Plus N150 8GB
- Depends
Get 24TB protected capacity from two 12TB drives in RAID 1
The mirror provides about 12TB before overhead on either model.
- Synology DiskStation DS225+
- Not suitable
- TerraMaster F2-425 Plus N150 8GB
- Not suitable
What matters in practice
The differences that matter
An SSD application pool should not displace the archive
DS225+ has no M.2 slots, so using internal SATA SSDs consumes the same two bays intended for hard drives. F2-425 Plus can keep a two-hard-drive mirror and add a separate two-SSD NVMe mirror, with one M.2 slot left.
How we reached this conclusion
DS225+ has two SATA and zero M.2 slots. TerraMaster has two SATA and three M.2 slots. A two-SSD mirror needs two compatible slots.
Some application requirements are a hard memory gate
An application plan with a documented 8GB minimum fits within the supplied F2-425 Plus memory but exceeds DS225+'s 6GB manufacturer ceiling. Choose TerraMaster for that specific requirement rather than assuming a later RAM purchase will make DS225+ equivalent.
How we reached this conclusion
Eight gigabytes is a hypothetical application requirement. DS225+ supports up to 6GB, while the exact TerraMaster listing includes 8GB.
Two 12TB drives do not make a protected 24TB archive
With two equal 12TB drives in RAID 1, either model offers about 12TB before overhead, because the second drive mirrors the first. Choose a larger-bay chassis if that is insufficient for files, versions and expected growth.
How we reached this conclusion
RAID 1 capacity is limited by the smaller member. Ethernet rates and additional M.2 pools are not added to the SATA mirror's capacity.
Choice A
Synology, DS225+
Synology DiskStation DS225+
The chassis has 2-bay storage. Its fastest documented network path is 2.5 Gbps.
- Best matched use
- Build a two-drive archive around Synology DSM
Checked facts
- Internal SATA bays: Two
- M.2 slots: None
- Ethernet: One 2.5GbE and one Gigabit
- Supplied memory and ceiling: 2GB supplied, up to 6GB
Choice B
TerraMaster, F2-425 Plus N150 8GB
F2-425 Plus N150 8GB
A compact hybrid NAS with two SATA bays, three M.2 slots and two 5GbE ports. It suits a small SSD workspace beside a bulk-storage mirror.
- Best matched use
- Add SSD application storage without consuming SATA bays
Checked facts
- Internal SATA bays: Two
- M.2 slots: Three
- Ethernet: Two 5GbE
- Supplied memory and ceiling: 8GB supplied
Meaningful differences
What changes the fit
| What changes | Synology DiskStation DS225+ | TerraMaster F2-425 Plus N150 8GB | Why it matters |
|---|---|---|---|
| Internal SATA bays | Two | Two | The same equal-drive mirror has the same nominal capacity. |
| M.2 slots | None | Three | Only TerraMaster can add onboard NVMe without taking a SATA bay. |
| Ethernet | One 2.5GbE and one Gigabit | Two 5GbE | The second port and the fastest single-link rating both differ. |
| Supplied memory and ceiling | 2GB supplied, up to 6GB | 8GB supplied | A workload with an 8GB minimum exceeds Synology's documented ceiling. |
| Software environment | Synology DSM | TerraMaster TOS | Check the actual backup and application workflow before changing platforms. |
What you give up
Every choice has a cost
If you choose Synology DiskStation DS225+
- The documented 6GB memory ceiling rules out an 8GB minimum requirement.
If you choose TerraMaster F2-425 Plus N150 8GB
- Extra SSD slots do not enlarge the two-SATA-drive mirror.
Recommendation switch
The decision flips if...
My application requires at least 8GB memory
Choose TerraMaster F2-425 Plus N150 8GB. The selected TerraMaster includes 8GB, while DS225+ officially tops out at 6GB.
I only need a hard-drive archive and want Synology DSM
Choose Synology DiskStation DS225+. DS225+ fits that two-bay DSM plan without needing an NVMe storage pool.
What matters in practice
How to make the call
An SSD application pool should not displace the archive
DS225+ has no M.2 slots, so using internal SATA SSDs consumes the same two bays intended for hard drives. F2-425 Plus can keep a two-hard-drive mirror and add a separate two-SSD NVMe mirror, with one M.2 slot left. Choose TerraMaster if that separation is part of the plan. Choose Synology if the job remains an ordinary hard-drive archive and its DSM workflow is the reason for buying.
Some application requirements are a hard memory gate
An application plan with a documented 8GB minimum fits within the supplied F2-425 Plus memory but exceeds DS225+'s 6GB manufacturer ceiling. Choose TerraMaster for that specific requirement rather than assuming a later RAM purchase will make DS225+ equivalent. If the intended backup workload does not need that memory, compare its software workflow first. This does not estimate how many containers or users either NAS can handle.
Two 12TB drives do not make a protected 24TB archive
With two equal 12TB drives in RAID 1, either model offers about 12TB before overhead, because the second drive mirrors the first. Choose a larger-bay chassis if that is insufficient for files, versions and expected growth. F2-425 Plus's faster network can improve the available link rate, but it cannot change this mirror arithmetic or replace a separate backup copy.
What this comparison cannot tell you
- No claim of easier setup or better software is inferred from hardware. Memory examples are conditional requirements, not measured workloads.
What the facts say
What the comparison shows
Useful conclusions from the current NAS devices comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Synology DiskStation DS225+ |
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| TerraMaster F2-425 Plus N150 8GB |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
Synology DiskStation DS225+
Build a two-drive archive around Synology DSM
See price & reviews on AmazonTerraMaster F2-425 Plus N150 8GB
Add SSD application storage without consuming SATA bays
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