Synology NAS 4-Bay DiskStation DS925+ (Diskless)

Synology DiskStation DS925+ (Flexible storage for everything from home office to edge.)

Overview & Key Features:

1. Purpose & Use Cases

• DS925+ is a 4-bay NAS (Network-Attached Storage) device — designed for home offices, small/medium businesses, creative studios, or any user needing a robust, centralized storage server. 

• It provides a flexible platform for file storage, backup, media storage, virtualization, private cloud services, and even surveillance systems, thanks to support for multiple drives, expansion, and robust software features. 

2. Hardware Specifications

• CPU: AMD Ryzen V1500B — Quad-core 2.2 GHz, 64-bit. 

• Memory: Comes with 4 GB DDR4 ECC SODIMM; two memory slots total; expandable up to 32 GB (with 2 × 16 GB modules). 

• Drive bays: 4 internal bays, supporting:

  • 3.5″ SATA HDD

  • 2.5″ SATA SSD

  • Additionally, 2 × M.2 NVMe slots (2280) — usable for SSD cache or storage pools (with compatible SSDs). 

• Expansion option: With the optional expansion unit (Synology DX525), total drive capacity expands to 9 drives. 

• Network: 2 × 2.5 GbE RJ-45 LAN ports — enabling faster network throughput than standard 1 GbE NAS, and support for link-aggregation or failover.

• Ports: 2 × USB 3.2 Gen 1, plus 1 expansion port (USB-C) for expansion unit.

• Performance: Sequential read speeds up to ~ 522 MB/s and write speeds up to ~ 565 MB/s (depending on configuration and drives).

• Physical & Power Specs: Dimensions ~ 166 × 199 × 223 mm; weight ~ 2.26 kg. Power adapter supports 100 V–240 V AC, power consumption around 37.9 W during access, ~12.3 W during hibernation; dual 92 mm fans; noise level ~ 20.5 dB(A).

3. Storage & Flexibility

• Supports multiple drive types — HDDs, SATA SSDs, and NVMe SSDs — giving flexibility: use HDDs for mass storage, SSDs for cache or fast storage tasks. 

• With expansion unit, raw storage capacity can scale up significantly (up to ~180 TB raw with 20 TB drives). 

• Supports multiple RAID types: Basic, JBOD, RAID 0/1/5/6/10, and hybrid RAID (depending on configuration). 

• Allows use of M.2 SSD slots either for caching (to speed up reads/writes) or — where compatible SSDs are used — for storage pools. 

4. Software & Features

• Runs Synology DiskStation Manager (DSM), giving you features like file syncing/sharing, user & permissions management, backups, remote access, versioning, snapshots, etc., making it full-featured as a private cloud / file server. 

• Can serve multiple roles: centralized file repository, media server, backup server (PCs, servers, cloud), virtualization host (VMs, containers), and surveillance server (IP cameras). 

• Supports advanced data protection: snapshots, backups (local, remote, cloud), redundancy via RAID, and depending on drives used — SSD caching for performance, or HDD for capacity. 

5. Who Is It For / Use-Case Scenarios

• Home users / power users who want a private cloud: store photos, videos, documents; stream media; sync across devices; backup important data.

• Small or medium businesses / offices needing shared storage, central backups, collaboration, virtualization — without investing in enterprise SAN/NAS infrastructure.

• Creative professionals / content creators requiring large storage (media files, videos, raw formats), fast access (SSD cache or NVMe), and data safety.

• Surveillance / security setups — can handle multiple IP cameras and store footage reliably.

• Growing storage needs — because you can expand storage later (via expansion unit), DS925+ is good for setups expected to grow over time.