Synology DS925+ 4-Bay NAS Storage | High-Performance Private Cloud, Backup & Enterprise Collaboration Solution

The Synology DS925+ is a high-performance 4-bay NAS designed for fast data access, scalable storage, and enterprise-grade backup and collaboration, making it ideal for businesses and advanced users.

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    Description

    Why Choose Synology DS925+ Product?

    The Synology DiskStation DS925+ is built for demanding workloads, combining powerful processing, high-speed networking, and scalable storage in one compact system. With dual 2.5GbE ports, SSD caching support, and expansion capabilities up to 9 drives, it offers flexibility and performance for growing environments. DSM enhances the experience with advanced data management, backup, and virtualization tools, making it a complete business-ready solution.


    Core Features & Benefits

    Centralized Storage & Private Cloud

    The Synology DS925+ provides a centralized storage hub with 4 drive bays, expandable up to 9 drives using an expansion unit. It supports up to 180 TB raw capacity, allowing businesses to scale storage as needed while maintaining full control over their data.


    Connectivity & Compatibility

    Featuring dual 2.5GbE LAN ports, the NAS delivers fast and flexible networking with support for link aggregation and failover. It supports multiple protocols including SMB, NFS, FTP, and WebDAV, ensuring compatibility across all major operating systems.


    Performance & Hardware

    Powered by an AMD Ryzen quad-core processor and ECC memory, the system delivers up to 522 MB/s read and 565 MB/s write speeds for high-performance multi-user environments. Dual M.2 NVMe slots enable SSD caching to further enhance performance.


    Software & Ecosystem (DSM)

    The Synology DS925+ runs on DiskStation Manager (DSM), offering a powerful ecosystem:

    • Synology Drive for file synchronization
    • Synology Photos for media management
    • Synology Office for collaboration
    • Synology Chat and MailPlus for communication

    DSM delivers enterprise-level capabilities with an intuitive interface.


    Security & Data Protection

    Comprehensive protection features include:

    • Snapshot Replication with version control
    • Hyper Backup for multi-destination backups
    • Adaptive Multi-Factor Authentication (AMFA)
    • Encrypted file systems and secure access protocols

    These features ensure data integrity and protection against cyber threats.


    Surveillance & Smart Monitoring

    The NAS supports up to 40 IP cameras, offering advanced surveillance capabilities with real-time monitoring, alerts, and secure recording. It includes 2 free licenses and supports ONVIF-compatible devices.


    Key Features & Highlights

    • 4-Bay NAS – Scalable and high-capacity storage
    • Dual 2.5GbE Ports – High-speed networking with redundancy
    • AMD Ryzen Quad-Core CPU – Powerful performance
    • ECC Memory – Reliable data integrity
    • Dual M.2 NVMe Slots – SSD caching support
    • Expandable to 9 Bays – Supports DX525 expansion
    • DSM OS – Advanced and user-friendly
    • Surveillance Ready – Supports multiple IP cameras

    Hardware Overview

     

    Synology DS925+

    Software & Ecosystem

    The system runs on Synology DSM, providing a complete ecosystem for file management, backup, virtualization, collaboration, and cloud integration. It also supports AI-driven workflows via Synology AI Console for advanced deployments.


    Ideal Use Cases

    • Business file server and centralized storage
    • Virtualization and IT infrastructure
    • Backup solution for servers and cloud
    • Surveillance system deployment
    • Remote work and team collaboration

    FAQs

    Q1. Can I expand storage later?
    Yes, it supports expansion up to 9 drives using a DX525 unit.

    Q2. Does it support SSD caching?
    Yes, it includes dual M.2 NVMe slots.

    Q3. Is it suitable for enterprise use?
    Yes, it supports virtualization, high user capacity, and advanced backup features.

    Q4. What is the maximum memory supported?
    It supports up to 32 GB ECC memory.

    Q5. Does it support high-speed networking?
    Yes, it includes dual 2.5GbE ports with link aggregation.

    Product Details

    Synology DS925+ – Full Technical Specifications

    General

    SpecificationDetails
    Product NameSynology DiskStation DS925+
    Device Type4-Bay NAS (Expandable to 9 Bays)
    Use CaseStorage, Backup, Sync, Virtualization, Surveillance
    Max Raw CapacityUp to 180 TB (with expansion)
    Warranty3 Years (Extendable to 5 Years)

    Performance

    SpecificationDetails
    Sequential ReadUp to 522 MB/s
    Sequential WriteUp to 565 MB/s

    Processor (CPU)

    SpecificationDetails
    CPU ModelAMD Ryzen V1500B
    CPU Quantity1
    CPU Cores4
    Architecture64-bit
    Frequency2.2 GHz
    Hardware Encryption EngineYes

    Memory

    SpecificationDetails
    Installed Memory4 GB DDR4 ECC SODIMM
    Pre-installed Module4 GB (4 GB Ă— 1)
    Memory Slots2
    Maximum Memory32 GB (16 GB Ă— 2)
    NoteUse Synology RAM for compatibility

    Storage

    SpecificationDetails
    Drive Bays4
    Max Bays with Expansion9 (DX525 x1)
    M.2 Slots2 Ă— NVMe
    Supported Drives3.5" SATA HDD, 2.5" SATA SSD, M.2 2280 NVMe SSD
    Hot SwapYes (Not for M.2 SSD)
    NotesCompatible drives required

    Storage Management

    SpecificationDetails
    Max Volume Size200 TB (requires 32 GB RAM), otherwise 108 TB
    Max Internal Volumes32
    SSD CacheSupported
    RAID TypesSHR, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
    NotesVolume size depends on drives, RAID, filesystem
    M.2 NoteRequires Synology-verified SSDs for storage pools

    External Ports

    SpecificationDetails
    LAN Ports2 Ă— 2.5GbE
    USB Ports2 Ă— USB 3.2 Gen 1
    Expansion Port1

    Hardware Components (From Diagram Page 6)

    ComponentDetails
    Status IndicatorYes
    Drive Status IndicatorsYes
    Drive Tray LockYes
    USB Port (Front)Yes
    Power Button & IndicatorYes
    Drive TraysYes
    FansYes
    2.5GbE PortsYes
    Reset ButtonYes
    USB Port (Rear)Yes
    Power PortYes
    Expansion PortYes
    Kensington Lock SlotYes
    M.2 NVMe SlotsYes

    Physical Specifications

    SpecificationDetails
    Dimensions (H Ă— W Ă— D)166 Ă— 199 Ă— 223 mm
    Weight2.26 kg

    Cooling

    SpecificationDetails
    System Fans2 Ă— 92 mm

    Power

    SpecificationDetails
    Input Voltage100V – 240V AC
    Frequency50/60 Hz (Single Phase)

    Environmental Conditions

    SpecificationDetails
    Operating Temperature0°C to 40°C
    Storage Temperature-20°C to 60°C
    Operating Humidity8% – 80% RH
    Storage Humidity5% – 95% RH
    Max Operating Altitude5000 m

    File System

    SpecificationDetails
    Internal DrivesBtrfs, ext4
    External DrivesBtrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT

    File Services

    SpecificationDetails
    ProtocolsSMB, AFP, NFS, FTP, WebDAV, Rsync
    Max SMB Connections40
    Windows ACL IntegrationYes
    NFS KerberosYes

    Account & Shared Folder Limits

    SpecificationDetails
    Max Users512
    Max Groups128
    Max Shared Folders128
    Max Sync Tasks4

    Virtualization Support

    PlatformDetails
    VMwareESXi 6.5 → 8.0 U2
    MicrosoftHyper-V (Windows Server 2022)
    CitrixXenServer 8 / Hypervisor 8.2 LTSR CU1
    OpenStackCinder

    Security

    SpecificationDetails
    FirewallYes
    EncryptionShared Folder Encryption
    Secure ProtocolsFTP over SSL/TLS, SFTP, Rsync over SSH
    ProtectionAuto Block
    CertificatesLet's Encrypt
    HTTPSCustom Cipher Support

    DSM General Specifications

    SpecificationDetails
    ProtocolsSMB1/2/3, NFS v3/v4/v4.1, iSCSI, HTTP, HTTPS, FTP, SNMP, LDAP, CalDAV
    BrowsersChrome, Firefox, Edge, Safari
    LanguagesMulti-language

    AI & Applications

    Synology AI Console

    SpecificationDetails
    AI ManagementSupported
    Third-party AISupported
    De-identification Rate40 words/sec
    RequirementMinimum 8 GB RAM + Container Manager

    Synology Drive

    SpecificationDetails
    Max Users80
    Max Files500,000

    File Station

    FeatureDetails
    Virtual DrivesYes
    Remote FoldersYes
    ACL EditorYes
    CompressionYes
    Bandwidth ControlYes
    Sharing LinksYes
    Transfer LogsYes

    Hybrid Share

    SpecificationDetails
    FunctionMulti-site sync
    RequirementSubscription

    SAN & Virtualization

    SpecificationDetails
    iSCSI Targets32
    LUN64
    LUN FeaturesClone, Snapshot, Windows ODX
    Virtual Machines8 Recommended
    Virtual DSM8 (1 Free License)

    Backup & Data Protection

    SpecificationDetails
    Active Backup SuiteYes
    Hyper BackupYes
    Snapshot ReplicationYes
    Snapshots per Folder256
    Total Snapshots2048
    High AvailabilitySupported

    Communication & Collaboration

    SpecificationDetails
    Synology Chat150 Users
    Synology Office80 Users
    MailPlus Accounts5 (Expandable)
    MailPlus UsersUp to 90
    CalendarYes

    Surveillance

    SpecificationDetails
    Default Licenses2
    H.264 CamerasUp to 40
    H.265 CamerasUp to 40
    4K CamerasUp to 30
    Max FPSUp to 1200 FPS
    ONVIF SupportYes

    VPN Server

    SpecificationDetails
    Max Connections8

    Packaging Contents

    ItemQuantity
    Main Unit1
    Accessory Pack1
    Power Adapter1
    Power Cable1
    LAN Cable2

    Optional Accessories

    CategoryDetails
    RAMDDR4 ECC SODIMM (4G / 8G / 16G)
    Expansion UnitDX525
    HDDHAT5300 / HAT3300 Series
    SSD (SATA)SAT5200 Series
    SSD (NVMe)SNV3400 / SNV5400 Series

    Compliance & Warranty

    SpecificationDetails
    ComplianceRoHS
    Warranty3 Years (Extendable to 5 Years)

    Notes

    CategoryDetails
    PerformanceDepends on environment and workload
    StorageDepends on RAID and drives
    ExpansionRequired for 9-bay setup
    SubscriptionsRequired for C2, Hybrid Share, Surveillance cloud
    Memory Requirement32 GB needed for 200 TB volume
    Camera Licenses2 included, more require purchase

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