Synology DiskStation DS425+ Tower 4-Bay Sata HDD 3.5” Sata SSD 2.5” , M.2 2280 NVMe SSD
619.91 €
DS425+
Hardware Specifications
| Category | Specification |
|---|---|
| CPU Model | Intel Celeron J4125 |
| CPU Quantity | 1 |
| CPU Cores | 4 |
| CPU Architecture | 64-bit |
| CPU Frequency | 2.0 GHz (base) / 2.7 GHz (turbo) |
| Hardware Encryption Engine | Yes |
| System Memory | 2 GB DDR4 non-ECC |
| Total Memory Slots | 1 |
| Maximum Memory Capacity | 6 GB (2 GB + 4 GB) |
| Memory Notes | Synology-certified modules recommended; non-Synology RAM voids warranty/support |
| Drive Bays | 4 |
| M.2 Slots | 2 × NVMe (2280) |
| Supported Drive Types | 3.5" SATA HDD / 2.5" SATA SSD / M.2 NVMe SSD |
| Hot Swappable Drives | Yes (M.2 not supported) |
| Storage Notes | Full compatibility only with Synology-verified drives |
| LAN Ports | 1 × 1GbE RJ-45, 1 × 2.5GbE RJ-45 |
| USB Ports | 2 × USB 3.2 Gen 1 |
| External Ports Notes | 1GbE LAN MTU max: 1,500 bytes |
| Dimensions (H × W × D) | 166 × 199 × 223 mm |
| Weight | 2.18 kg |
| System Fans | 2 × 92 × 92 mm |
| Fan Modes | Full-Speed / Cool / Quiet |
| Adjustable LED Brightness | Yes |
| Power Recovery | Yes |
| Noise Level | 21.6 dB(A) |
| Scheduled Power On/Off | Yes |
| Wake on LAN / WAN | Yes |
| Power Supply | 90 W |
| AC Input Voltage | 100–240 V AC |
| Power Frequency | 50/60 Hz, Single Phase |
| Power Consumption (Access) | 28.25 W |
| Power Consumption (HDD Hibernation) | 6.10 W |
| BTU (Access) | 96.33 BTU/hr |
| BTU (HDD Hibernation) | 20.79 BTU/hr |
| Environmental Notes | Noise test using Synology SATA SSDs; idle state measurement |
| Operating Temperature | 0°C – 40°C |
| Storage Temperature | –20°C – 60°C |
| Operating Humidity | 8% – 80% RH |
| Storage Humidity | 5% – 95% RH |
| Certifications | FCC, CE, BSMI, VCCI, RCM, UKCA, EAC, CCC, KC, BIS |
| Warranty | 3-year (extendable to 5-year) |
| Warranty Notes | EW Plus in EU/US; EW201/EW202 available in Asia/Africa/Oceania |
| Environmental Compliance | RoHS |
| Package Contents | Main Unit ×1, Accessory Pack ×1, AC Adapter ×1, Power Cord ×1, RJ-45 LAN Cables ×2 |
| Optional Accessories | D4NS01-4G, HAT5300 HDD, HAT3300 HDD, SAT5200 SSD, SNV3400/SNV5400 NVMe SSD |
Software Specifications
| Category | Specification |
|---|---|
| Maximum Single Volume Size | 108 TB |
| Maximum Internal Volume Number | 32 |
| M.2 SSD Storage Pool Support | Yes |
| SSD Read/Write Cache | Yes |
| SSD TRIM | Yes |
| Supported RAID Types | SHR, Basic, JBOD, RAID 0/1/5/6/10 |
| Supported RAID Migration | Basic→RAID1, Basic→RAID5, RAID1→RAID5, RAID5→RAID6 |
| Volume Expansion (Larger HDDs) | SHR, RAID1/5/6/10 |
| Volume Expansion (Add HDD) | SHR, JBOD, RAID5 |
| Global Hot Spare Supported RAID Types | SHR, RAID1, RAID5 |
| Storage Notes | Volumes expandable up to 108 TB; usable capacity depends on filesystem & metadata; M.2 pools require Synology-verified SSDs |
| Internal File System | Btrfs, ext4 |
| External File System | Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT |
| Supported File Protocols | SMB, AFP, NFS, FTP, WebDAV, Rsync |
| Maximum SMB Connections (FSCT) | 10 |
| Windows ACL Integration | Yes |
| NFS Kerberos Authentication | Yes |
| File Services Notes | Tested fully populated; FSCT workload: HomeFolder; 8 × Windows 10 clients; directory leasing enabled |
| Maximum Local User Accounts | 512 |
| Maximum Local Groups | 128 |
| Maximum Shared Folders | 128 |
| Maximum Shared Folder Sync Tasks | 4 |
| Maximum Hybrid Share Folders | 10 |
| Hyper Backup — Folder/Package Backup | Yes |
| Hyper Backup — Full System Backup | Yes |
| Synology High Availability | Supported |
| Syslog Events per Second | 800 |
| VMware vSphere Support | ESXi 6.5 → 8.0 U2 |
| Microsoft Hyper-V Support | Windows Server 2022 |
| Citrix Support | XenServer 8 / Citrix Hypervisor 8.2 LTSR CU1 |
| OpenStack | Cinder |
| Supported Protocols (General) | SMB1/2/3, NFSv3/4/4.1, Kerberized NFS, iSCSI, HTTP/HTTPS, FTP, SNMP, LDAP, CalDAV |
| Supported Browsers | Chrome, Firefox, Edge, Safari |
| Supported Languages | EN, DE, FR, IT, ES, DA, NO, SV, NL, RU, PL, HU, BR-PT, PT-PT, TR, CS, TH, JP, KR, CN (Traditional & Simplified) |
| Central Management System | Supported |
| Synology AI Console | Supported |
| Third-Party AI Model Integration | Supported |
| Synology Chat — Max Users | 100 |
| Chat Notes | Tested with 20,000 messages/user; response time <10 sec |
| Download Station — Max Tasks | 80 |
| Maximum iSCSI Targets | 2 |
| Maximum LUNs | 4 |
| LUN Clone/Snapshot / Windows ODX | Supported |
| MailPlus Free Accounts | 5 |
| MailPlus — Max Users | 20 |
| MailPlus Notes | Anti-spam, antivirus, DNSBL, greylist, full-text search enabled |
| DLNA Compliance (Media Server) | Supported |
| Synology Photos — Facial Recognition | Supported |
| Synology Photos — Object Recognition | Yes (requires 4 GB RAM) |
| Max Snapshots per Shared Folder | 128 |
| Max Snapshots per LUN | 32 |
| Max Snapshots per System | 1,024 |
| Max Replication Tasks (Folders) | 16 |
| Max Replication Tasks (LUNs) | 8 |
| Max Replication Tasks per System | 16 |
| Surveillance — Default Licenses | 2 |
| Max Cameras & FPS (H.264) | 1080p: 40ch/800FPS • 3MP: 35ch/350FPS • 5MP: 28ch/280FPS • 4K: 17ch/170FPS |
| Max Cameras & FPS (H.265) | 1080p: 40ch/1200FPS • 3MP: 40ch/600FPS • 5MP: 40ch/480FPS • 4K: 20ch/200FPS |
| Surveillance Notes | Tested fully populated; continuous recording; actual performance varies by configuration |
| Synology Drive — Max Users | 20 |
| Synology Drive — Max Hosted Files | 500,000 |
| Drive Notes | 20% active users; single SSD volume recommended |
| Synology Office — Max Users | 20 |
| Office Notes | 20% active; tested with i3-3220 / 8 GB RAM |
| VMM — Recommended VM Instances | 2 |
| Virtual DSM — Recommended Instances | 2 (1 license free) |
| VMM Notes | Depends on memory configuration |
| VPN Server — Max Connections | 4 |
