SYNOLOGY DiskStation DS925+ 4-BAY Network Attached Storage

CPU Model

AMD Ryzen V1500B

CPU Quantity

1

CPU Core

4

CPU Architecture

64-bit

CPU Frequency

2.2 GHz

Hardware Encryption Engine

Yes

System Memory

4 GB DDR4 ECC SODIMM

Memory Module Pre-installed

4 GB (1 x 4 GB)

Total Memory Slots

2

Max Memory Capacity

32 GB (2 x 16 GB)

Memory Notes

Use only Synology memory modules. Modules must be identical for multi-module configs.

Drive Bays

4

Max Drive Bays (with Expansion)

9 (via DX525 x1)

M.2 Drive Slots

2 (NVMe)

Supported Drive Types

3.5" SATA HDD, 2.5" SATA SSD, M.2 2280 NVMe SSD

Hot Swappable Drives

Yes (except M.2 SSD slots)

RJ-45 2.5GbE LAN Ports

2

USB 3.2 Gen 1 Ports

2

Expansion Port

1 x USB Type-C

Size (H x W x D)

166 mm x 199 mm x 223 mm

Weight

2.26 kg

System Fan

2 x 92 mm

Fan Modes

Full-Speed, Cool, Quiet

LED Brightness Control

Yes

Power Recovery

Supported

Noise Level

20.5 dB(A)

Scheduled Power On/Off

Supported

Wake on LAN/WAN

Supported

Power Adapter

100W (120W peak)

AC Input Voltage

100V–240V AC, 50/60 Hz

Power Consumption

37.91W (Access), 12.33W (HDD Hibernation)

BTU Rating

129.27 BTU/hr (Access), 42.05 BTU/hr (HDD Hibernation)

Operating Temperature

0°C to 40°C (32°F to 104°F)

Storage Temperature

-20°C to 60°C (-5°F to 140°F)

Operating Humidity

8% to 80% RH

Storage Humidity

5% to 95% RH

Certifications

FCC, CE, BSMI, VCCI, RCM, UKCA, EAC, CCC, KC, BIS

Warranty

3 years (extendable to 5 years with EW201)

Environmental Compliance

RoHS Compliant

Packaging Contents

Main Unit x1, Accessory Pack x1, AC Adapter x1, Power Cord x1, RJ-45 Cable x2

Optional Accessories

DDR4 ECC SODIMM (D4ES04-4G, D4ES03-8G/16G), DX525 Expansion, HAT5300/HAT3300 HDDs, SAT5200 SSD, SNV3400/SNV5400 NVMe SSDs

Max Single Volume Size

200 TB (32 GB memory required); 108 TB otherwise

Max Internal Volume Number

32

M.2 SSD Storage Pool Support

Yes*

SSD Read/Write Cache

Yes (Cache size based on SSD capacity)

SSD TRIM

Supported

Supported RAID Types

Synology Hybrid RAID, Basic, JBOD, RAID 0/1/5/6/10

RAID Migration

Basic → RAID 1/5, RAID 1 → RAID 5, RAID 5 → RAID 6

Volume Expansion (Larger HDDs)

SHR, RAID 1/5/6/10

Volume Expansion (Add HDD)

SHR, JBOD, RAID 5/6 (with expansion)

Global Hot Spare Support

SHR, RAID 1/5/6/10 (with expansion unit)

File System (Internal)

Btrfs, ext4

File System (External)

Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT

File Protocols

SMB, AFP, NFS, FTP, WebDAV, Rsync

Max SMB Connections (FSCT)

40

Windows ACL Integration

Yes

NFS Kerberos Authentication

Yes

Max Local User Accounts

512

Max Local Groups

128

Max Shared Folders

128

Max Shared Folder Sync Tasks

4

Hybrid Share Folders

10

Hyper Backup

Full system and folder backup supported

High Availability

Supported

Syslog Events per Second

800

Virtualization Support

VMware vSphere, Hyper-V, Citrix XenServer, OpenStack Cinder

Supported Protocols

SMB1–3, NFSv3–v4.1, iSCSI, HTTP(S), FTP, SNMP, LDAP, CalDAV

Supported Browsers

Chrome, Firefox, Edge, Safari

Languages Supported