- Stock: Available For Order remaining
- Brand: Synology
- Model: DS425+
Synology DiskStation DS425+ — 4-Bay Desktop Network Attached Storage (NAS)
The perfect combination of enterprise-grade performance and flexibility! The Synology DiskStation DS425+ is a highly scalable 4-Bay desktop NAS. Powered by an Intel Celeron J4125 4-core processor and DDR4 memory, it delivers an exceptional file management, data protection, virtualization, and centralized backup solution for small-to-medium businesses and professional studios.
Equipped with built-in 2.5GbE and 1GbE LAN ports, it provides fast and reliable network bandwidth to achieve over 278 MB/s sequential read and 281 MB/s sequential write speeds. It natively features four drive bays supporting 3.5" or 2.5" SATA drives, plus two built-in M.2 2280 NVMe SSD slots for SSD caching or creating all-flash storage pools, making it an ideal investment for growing business data needs.
Built for Business
Intel Celeron Quad-Core Performance
Equipped with an Intel Celeron J4125 4-core 4-thread processor and DDR4 memory (expandable up to 6 GB) to reliably power multitasking applications, virtual machines, and intensive database I/O workloads.
Flexible 4-Bay Desktop Scalability
The compact desktop chassis provides 4 standard drive bays (up to 96 TB raw capacity). Through flexible RAID configurations, it easily handles growing enterprise data storage needs.
Built-in 2.5GbE & 1GbE LAN & M.2 NVMe
Features one 2.5GbE and one 1GbE RJ-45 LAN port, plus two M.2 2280 NVMe SSD slots for read/write caching or creating SSD storage pools without occupying front drive bays.
Comprehensive Data Protection & Smart Surveillance
Integrates Synology backup solutions to seamlessly protect physical PCs, virtual machines, and cloud services, defends against ransomware with immutable snapshot technology, and manages up to 40 IP cameras simultaneously.
Hardware and System Specifications
| Hardware Specifications | |
|---|---|
| Device Type | 4-Bay Desktop NAS |
| Processor (CPU) |
Intel Celeron J4125 (CPU Quantity: 1) * 64-bit architecture, 4-core 4-thread, 2.0 GHz base frequency / 2.7 GHz burst frequency |
| Hardware Encryption Engine | Supported (AES-NI) |
| System Memory |
2 GB DDR4 non-ECC (2 GB × 1 pre-installed) * Note: DS425+ comes pre-installed with 2 GB DDR4 non-ECC memory; 1 total memory slot, expandable up to 6 GB (2 GB + 4 GB) |
| Drive Bays & Expansion |
4 × 3.5" SATA HDD or 2.5" SATA SSD 2 × M.2 2280 NVMe SSD slots (supports cache or storage pool creation) * Maximum raw capacity guidance: Up to 96 TB using 24 TB drives |
| Hot Swappable Drive |
Supported * Note: The hot swappable drive feature is not supported by M.2 SSD slots. |
| External Ports |
1 × RJ-45 1GbE LAN Port 1 × RJ-45 2.5GbE LAN Port 2 × USB 3.2 Gen 1 Ports |
| Dimensions (Height × Width × Depth) | 166 mm × 199 mm × 223 mm |
| Weight | 2.18 kg |
| System Fan & Cooling Modes |
2 × (92 mm × 92 mm) Fans * Supported fan modes: Full-Speed Mode, Cool Mode, Quiet Mode |
| Adjustable Front LED Brightness | Supported |
| Power Management |
Supports Power Recovery Supports Wake on LAN / WAN Supports Scheduled Power On / Off |
| Noise Level | 21.6 dB(A) |
| Power Supply Unit / Adapter |
90W Power Adapter * AC Input Power Voltage: 100V to 240V AC (Power Frequency: 50/60 Hz, Single Phase) |
| Power Consumption |
28.25 W (Access) 6.10 W (HDD Hibernation) |
| British Thermal Unit (BTU) |
96.33 BTU/hr (Access) 20.79 BTU/hr (HDD Hibernation) |
| Operating & Storage Environment |
Operating Temperature: 0°C to 40°C (32°F to 104°F) Storage Temperature: -20°C to 60°C (-5°F to 140°F) Relative Humidity: 5% to 95% RH |
| Certifications | FCC, CE, BSMI, VCCI, RCM, UKCA, EAC, CCC, KC, BIS |
| Environmental Standards | RoHS Compliant |
| Packaging Content | Main Unit × 1, Accessory Pack × 1, AC Power Adapter × 1, AC Power Cord × 1, RJ-45 LAN Cable × 2 |
| Optional Accessories |
• DDR4 non-ECC SODIMM: D4NS01-4G • 3.5" SATA HDD: Enterprise Series HAT5300 / Plus Series HAT3300 • 2.5" SATA SSD: Enterprise Series SAT5200 • M.2 2280 NVMe SSD: Enterprise Series SNV3400 & SNV5400 |
| Warranty |
3-Year Hardware Warranty * Extendable up to 5 years with EW201 or Extended Warranty Plus |
| DSM System & Software Specifications | |
| Storage Management |
• Maximum Single Volume Size: 108 TB • Maximum Internal Volume Number: 32 • Advanced SSD Support: M.2 SSD Storage Pool Support, SSD Read / Write Cache, SSD TRIM |
| Supported File Systems |
Internal Drives: Btrfs, ext4 External Drives: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT |
| Supported RAID Types | Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10 |
| RAID Migration & Volume Expansion |
• RAID Migration: Basic to RAID 1, Basic to RAID 5, RAID 1 to RAID 5, RAID 5 to RAID 6 • Volume Expansion with Larger HDDs: SHR, RAID 1, RAID 5, RAID 6, RAID 10 • Volume Expansion by Adding a HDD: SHR, JBOD, RAID 5, RAID 6 • Global Hot Spare Support: SHR, RAID 1, RAID 5, RAID 6 |
| File Services & Network Protocols |
• File Protocols: SMB, AFP, NFS, FTP, WebDAV, Rsync • Permissions & Authentication: Windows Access Control List (ACL) Integration, NFS Kerberos Authentication • Supported General Protocols: SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP |
| Account & Shared Folder Limits |
• Maximum Local User Accounts: 512 • Maximum Local Groups: 128 • Maximum Shared Folders: 128 (Maximum Shared Folder Sync Tasks: 8) |
| Backup, Snapshots & High Availability |
• Hyper Backup: Supports folder, package, and entire system backup • Snapshot Replication: Maximum 128 snapshots per shared folder, up to 256 system snapshots • Hybrid Share: Up to 10 Hybrid Share shared folders • Log Center: Up to 800 Syslog events per second |
| Virtualization & SAN Management |
• Virtualization Support: VMware ESXi 6.5 and VAAI, Windows Server 2022, Citrix Ready, OpenStack • SAN Manager: Maximum 2 iSCSI Targets, Maximum 2 LUNs (Supports LUN Clone / Snapshot and Windows ODX) • Virtual Machine Manager: Recommended 8 Virtual Machines, Recommended 8 Virtual DSM instances (includes 1 free license) |
| Collaboration & Add-on Packages |
• Synology Drive: Up to 80 users, up to 500,000 hosted files • Synology Office: Up to 80 users • Synology MailPlus / MailPlus Server: Up to 90 users (includes 5 free email account licenses) • Synology Chat: Up to 150 users • Network & Download: Download Station up to 80 download tasks; VPN Server up to 8 connections • Media & Management: Supports Central Management System (CMS), DLNA-compliant Media Server, and Synology Photos (supports facial and object recognition) |
| Surveillance Station |
• Default Licenses: 2 free camera licenses included (additional licenses sold separately) • Recommended Max IP Cameras and Total FPS (H.264): 1080p: 40 channels / 3M: 40 channels / 5M: 30 channels / 4K: 20 channels • Recommended Max IP Cameras and Total FPS (H.265): 1080p: 40 channels / 3M: 40 channels / 5M: 40 channels / 4K: 30 channels |
| Supported Browsers & Languages |
• Supported Browsers: Chrome, Firefox, Edge, Safari • Supported Languages: English, Traditional Chinese, Simplified Chinese, and multiple international languages |
Chassis Details & Features
