General
Processor	Intel Celeron J4125 2.0 GHz
RAM	2 GB DDR4 non-ECC
RAM slot	1 piece
Maximum RAM capacity	6 GB
Drive bay	4 piece
Supported drive types	3.5" SATA HDD / 2.5" SATA SSD / M.2 2280 NVMe SSD
M.2 slots	2 piece
HotSwap	Yes (not for M.2 SSD)
Network connection	1x RJ-45 2.5 GbE, 1x RJ-45 1 GbE
PCIe slots	none

The Synology DiskStation DS425+ is a 4-bay NAS server from the Plus series, designed for demanding private users, home office users, and small businesses. The device serves as a central storage platform and supports functions such as file sharing, backup, private cloud, media server, virtualization, and video surveillance. It is based on Synology's DSM operating system, which offers a comprehensive range of features and provides higher performance and additional expansion options compared to Value models.

Applications

The DS425+ is suitable as a central storage solution for home applications, home office environments, and small offices. It can serve as a backup server for locally and remotely stored data, as a private cloud for access from various devices, as a media server for audio and video files, and as a platform for virtualization and container environments. The support for video surveillance also makes it suitable for security applications.

Functions and Features in Detail

The device features four drive bays that support both 8,9 cm ( 3,5 inch ) SATA hard drives and 6,3 cm ( 2,5 inch ) SATA SSDs. Two M.2 2280 NVMe slots allow installation of NVMe SSDs, which can be used as cache or for fast access functions. The drives are operable in hot-swap mode, although M.2 SSDs are not supported in hot-swap mode. The integrated RAM capacity is 2 GB DDR4 non-ECC, with an additional RAM slot available, enabling a maximum total capacity of 6 GB.

Technology Explained Simply

The DS425+ is equipped with an Intel Celeron J4125 processor with a clock speed of 2.0 GHz, providing balanced performance with low power consumption. The network connections include one RJ-45 port with 2.5 GbE and another RJ-45 port with 1 GbE, enabling fast data transfer within the local network. The use of NVMe SSDs in M.2 format can significantly improve access times for frequently used data. The integrated RAM expansion allows system performance to be adjusted according to specific requirements.

Compatibility and Accessories

The DS425+ is compatible with 8,9 cm ( 3,5 inch ) SATA hard drives, 6,3 cm ( 2,5 inch ) SATA SSDs, and M.2 2280 NVMe SSDs. The drives can be replaced in hot-swap mode, although M.2 SSDs cannot be operated in hot-swap mode. The network connections support 1 GbE and 2.5 GbE, enabling integration into modern network infrastructures. There are no PCIe slots, so no additional PCIe cards can be installed.

Installation and Mounting

The device is designed as a desktop system and does not require special mounting. Installation involves inserting the desired drives into the bays and connecting to the network via the RJ-45 ports. Configuration is performed using the DSM software, accessible via a web browser. Setup is feasible for users with basic IT knowledge.

Advantages in Operation

The DS425+ offers a stable and powerful platform for various storage and network functions. The combination of 4 drive bays, M.2 NVMe support, and a 2.5 GbE network connection enables flexible use. The DSM software provides an intuitive interface and extensive features, simplifying management and use of the NAS system. The RAM expansion allows adaptation to growing requirements.