Synology DiskStation DS425+ 4-Bay Desktop NAS Enclosure
DS425+
Condition: NEW
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Dhs. 2,059.00 (exc. Vat) - Regular price
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Dhs. 2,059.00 (exc. Vat)
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Synology Network Attached Storage
Synology DiskStation DS425+ 4-Bay Desktop NAS Enclosure
A four-bay Synology with two NVMe cache slots on top — the point where RAID stops meaning "one drive can fail" and starts meaning "two can". Intel Celeron J4125 quad-core, 2 GB of DDR4 expandable to 6 GB, and a 2.5GbE port alongside a Gigabit one. Supplied without drives — you choose and budget for those separately.
Quick Glance
Key Features
Four bays, and two NVMe slots that do not cost you one
Four 3.5-inch SATA bays for capacity, plus two M.2 2280 NVMe slots for SSD caching. On a two-bay unit a cache drive occupies half your storage; here it does not touch the bays at all.
Redundancy that survives a second failure
Four bays is where RAID 6 and SHR-2 become possible, so a second drive can fail while the first is still rebuilding. That rebuild window is exactly when large arrays are most likely to lose another disk.
DSM does the work
DiskStation Manager runs file sharing, Active Backup for Business, Synology Drive, Photos and Surveillance Station from one web interface, with Btrfs snapshots underneath for point-in-time rollback.
Detailed Specifications
Synology measured this model's noise level with SSDs installed. Figures quoted for other models in the range were measured with hard drives fitted, so the two are not directly comparable.
Specifications are provided by the manufacturer and may be updated or changed without prior notice. AtomOffice is not responsible for any discrepancies between the information shown here and the manufacturer's official documentation.
Need-to-Know
- The DS425+ ships as a bare enclosure. Budget for up to four SATA drives on top, and check them against Synology's compatibility list before ordering — Synology only guarantees full functionality and support for drives on that list.
- Memory is part-soldered: 2 GB is fixed to the board and there is a single free slot, giving a 6 GB ceiling with a 4 GB module. It is not a pair of matched slots, and Synology will not provide full warranty or technical support if a non-Synology module is fitted.
- The two M.2 NVMe slots are not hot-swappable, unlike the four SATA bays — the unit has to be powered down to change a cache drive.
- The two network ports are different speeds — one 2.5GbE and one Gigabit — so they will not combine into a single faster link. Synology also caps the Gigabit port at a 1,500-byte MTU, which rules out jumbo frames on that port.
- The warranty is 3 years and can be extended to 5, but the extension SKU is regional: in the UAE that is EW201. 'Extended Warranty Plus' is sold only in Europe and North America, so do not budget for it here.
Best For / Customer Benefits
Customer Benefits
- Four bays means RAID 6 or SHR-2 — two drives can fail and the data still survives.
- NVMe caching speeds up busy shares without giving up one of your four drive bays.
- Active Backup for Business protects PCs, Macs and servers without a per-seat licence.
- Btrfs snapshots roll a share back to a point in time, which is what actually saves you after ransomware.
Best For
Official & Recommended Options
Don't see the accessory you need? Email info@atomoffice.com — we carry a range of Synology storage accessories and can help you find the right fit.
Learn More About the DS425+
Frequently Asked Questions
No. It is sold as a diskless enclosure, so you choose the drives to suit the capacity and budget you need. It takes up to four 3.5-inch SATA hard drives or 2.5-inch SATA SSDs, plus up to two M.2 NVMe SSDs for caching. Synology only guarantees full functionality and support for drives on its compatibility list, so check there first — we are happy to quote validated Synology drives alongside the unit.
Survive a second drive failure. Two bays reach RAID 1 or SHR, which protects against one failed drive. Four bays reach RAID 6 and SHR-2, which stay intact if a second drive dies while the first is still rebuilding — and a rebuild is exactly when the remaining drives are working hardest. Four bays also let you grow capacity by adding disks rather than replacing them.
No, and that is the main practical difference from the two-bay models. The two M.2 2280 NVMe slots are separate from the four SATA bays, so an SSD cache costs you no capacity. Note they are not hot-swappable — Synology supports hot-swap on the SATA bays only, so the unit must be powered down to change a cache drive.
Not into one faster link. The DS425+ has one 2.5GbE port and one Gigabit port rather than a matched pair, so link aggregation cannot usefully bond them. The second port is still worth having for separating traffic, keeping a management path open, or failover. Synology also caps the Gigabit port at a 1,500-byte MTU, so jumbo frames apply only to the 2.5GbE port.
Not Sure How Many Bays or Which Drives?
Tell our UAE team what you are storing, how fast it needs to be and how much you can afford to lose, and we will size the NAS, the drives and the RAID level with you — including when a smaller unit is the right answer.