Bay count, drive interface and the processor behind the applications · review
Synology DS225+, two-bay enclosure with one 2.5GbE and one 1GbE socket review
A two-bay enclosure that publishes its processor, its memory ceiling and the exact module that raises it, and one 2.5GbE socket beside a 1GbE one — but no drive size, no array level and no software name.
The title gives a Synology 2-Bay NAS DS225+, diskless. The bullets: drives must come from Synology’s compatibility list; the model replaces the DS224+ in the two-bay Plus series with an Intel Celeron J4125 quad-core processor; 2 GB of non-ECC DDR4 SODIMM, upgradable to 6 GB as 2 GB plus 4 GB; support for the module D4NS01-4G; and one 2.5GbE and one 1GbE RJ-45 port. The description covers syncing and sharing across devices and rolling files back with versioning.
One fast socket
The 2.5GbE socket is the line that separates this model from the gigabit two-bay units on this shelf. One client at a time gets the faster speed; the 1GbE socket is a second path, not a doubling.
The memory, published all the way down
2 GB fitted, 6 GB maximum, reached as 2 GB plus 4 GB, using module D4NS01-4G. That is four facts about one upgrade, and few listings on this shelf publish even two of them.
The list the drives have to come from
The first bullet makes drive compatibility a condition and points elsewhere for the answer. The cheapest drives may not be candidates, and the check belongs before the order.
Before ordering
Pull the drive compatibility list, and decide whether the client that matters most has a 2.5-gigabit socket to use the fast port.
Where it holds up, and where it stops
Strengths
The memory path is published completely: what ships, the ceiling, how it is reached and the part number of the module
One 2.5GbE socket, so a single computer can copy faster than a gigabit allows
The first bullet says outright that the drives must come from a compatibility list, before purchase rather than after
The processor is named to its model number, the Intel Celeron J4125
Compromises
Only one of the two sockets is 2.5 Gbit/s, and no clock speed is given for the processor
The compatibility list the first bullet requires is not reproduced on the page
No array arrangement, no software name, no power figure and no measurement
Specifications
Bay count
Two — stated in the title, and the second bullet places the model in the two-bay Plus series as the replacement for the DS224+
Drive interface
Not published on the listing as a size or a bus — the first bullet states that the unit requires compatible drives and directs the reader to the maker’s own compatibility list, which is where the answer is kept rather than here
Solid-state slot count
Not published on the listing — no M.2 slot and no cache slot is named, and the only expansion the page describes is a memory module
Processor
Intel Celeron J4125, quad-core — named in the second bullet; no clock speed is printed
Memory
2 GB non-ECC DDR4 SODIMM as supplied, upgradable to 6 GB as 2 GB plus 4 GB — stated in the third bullet, with the fourth naming the module by its part number, D4NS01-4G
Ethernet port count
Two RJ-45 — the fifth bullet counts one 2.5GbE and one 1GbE
Port speed
2.5 Gbit/s on one socket, 1 Gbit/s on the other — stated in the fifth bullet
USB ports
Not published on the listing — no USB socket is counted in the title or in the five bullets, which cover drives, the processor, memory and the network sockets
Supported redundancy levels
Not published on the listing — no array arrangement is named, and the bullets stay with the hardware and its compatibility list
Published operating system
Not named on the listing — the description covers syncing, mobile apps, desktop clients, a browser interface and file versioning without naming the software
Stated idle power
Not published on the listing — no figure in watts appears, on a page that details the memory module to its part number
Stated acoustic figure
Not published on the listing — neither a decibel value nor a claim about noise is printed
Stated dimensions
Not published on the listing — no measurement of the case appears in the title or in the five bullets
Amazon reference
B0FC2888KF
EAN
4260730618883
On Amazon.com
Amazon.com had an offer at $421 on October 26, 2026.
The questions that come up before an order
What does the 2.5GbE socket change on a two-bay enclosure?
It raises the wired ceiling above a gigabit for one computer copying to or from the unit, which two spinning drives can approach. The second socket is 1GbE, so a second client connected to it gets the older speed.
Why does a maker require drives from a published list?
It narrows what the maker supports to combinations it has qualified, and it removes the freedom to fit whatever is cheapest. The list belongs beside the price when two enclosures are compared; this page names the requirement and leaves the list itself elsewhere.
Our score
7.8/ 10
Precise about the processor, the memory path and the sockets, and silent on the drive size, the array levels and the software. The drive compatibility list is the line to read before ordering.
Against the rest of the network and storage gear
This network and storage gear share the category and the price bracket. Only what each one states is shown; an incomplete column would mislead.
Model
Price
Bay count
Drive interface
Solid-state slot count
Processor
Synology DS225+, two-bay enclosure with one 2.5GbE and one 1GbE socket
$421
Two — stated in the title, and the second bullet places the model in the two-bay Plus series as the replacement for the DS224+
Not published on the listing as a size or a bus — the first bullet states that the unit requires compatible drives and directs the reader to the maker’s own compatibility list, which is where the answer is kept rather than here
Not published on the listing — no M.2 slot and no cache slot is named, and the only expansion the page describes is a memory module
Intel Celeron J4125, quad-core — named in the second bullet; no clock speed is printed
Two — stated in the title as 2-Bay and in the seventh bullet as two drive bays holding 4 TB in total, with the drives included
Not published on the listing as a size or a bus — the seventh bullet gives 4 TB across two bays with the drives supplied, and no inch figure and no bus appears anywhere
Not published on the listing — no M.2 slot and no cache slot is named in the title or in any of the ten bullets
Not published on the listing — no chip, no core count and no clock speed appears, on a page claiming up to seven times the performance of an earlier range
One — stated in the title as 1-Bay and in the seventh bullet as one drive bay with the drive included. Unlike the one-bay LinkStation 210 pages on this shelf, the first bullet makes no RAID claim
Not published on the listing as a size or a bus — the seventh bullet states 8 TB of total capacity with the drive included, and no inch figure and no bus appears anywhere
Not published on the listing — no M.2 slot and no cache slot is named in the title or in any of the ten bullets
Not published on the listing — no chip, no core count and no clock speed appears, on a page whose first bullet claims up to seven times the performance of an earlier range
Two — stated in the title as 2-Bay and in the seventh bullet as two drive bays holding 12 TB in total, with the drives included
Not published on the listing as a size or a bus — the seventh bullet gives 12 TB across two bays with the drives supplied, and no inch figure and no bus appears anywhere on the page
Not published on the listing — no M.2 slot and no cache slot is named in the title or in any of the ten bullets
Not published on the listing — no chip, no core count and no clock speed appears anywhere on the page
What separates the models, in network and storage gear
If price decides: BUFFALO LinkStation 710, 8 TB, at $383.
The buyer this one serves, among network and storage gear
A household or small office replacing an older two-bay unit, where the applications matter more than the price and where a compatibility list is not an obstacle.
What this one costs among network and storage gear
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Specifications: the manufacturer sheet for network and storage gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
four HDD bays and two M.2 slots · up to 136 TB · 8 GB DDR4 · 128 GB PCIe 3.0 SSD · 2.5G and 1G LAN · processor and software not named
A four-bay enclosure whose Amazon.com listing fits its whole specification into one line — four HDD bays, two M.2 slots, 2.5G and 1G LAN, 8 GB DDR4 and a 128 GB SSD — and names no processor and no software.
Best for: A buyer who already knows this model and the software they will run on it, and wants four HDD bays plus two M.2 slots in one box.
two bays · Realtek RTD1619B, four cores at 1.7 GHz · 1 GB DDR4 · one 1GbE socket · Btrfs and iSCSI snapshots named · sold without drives
A two-bay enclosure whose title states the processor, the memory and the single gigabit socket, and whose page never names the drive interface, an array arrangement or the software that runs it.
Best for: A first enclosure for a household copy of photographs and documents, where one gigabit is enough and where the buyer is content to look up the drive compatibility elsewhere.
two bays · 4 TB of drives included · ships in RAID 1 with 2 TB usable · $143.00 per usable terabyte · 24 months covering the drives · macOS 15 ceiling
The bottom rung of the LinkStation 220 ladder, and the most expensive terabyte on it: two terabytes usable for $285.99, where the twelve-terabyte version of the same box asks less than a third as much per terabyte.
Best for: The smallest mirrored LinkStation, for someone who wants two terabytes protected and nothing else, and will not want more later.
