Synology DS725+ SAN/NAS Storage System - DiskStation 1 x AMD R Series R1600 Dual core (2 Core) 2.60 GHz 2 x HDD Supported 2 x SSD Supported 4 GB RAM DDR4 SDRAM Serial ATA Controller RAID Supported 0, 1, 5, 6, 10, Basic, Hybrid RAID, JBOD RAID

• Number of Hard Drives Supported:
  2
  
• Number of Solid State Drive Supported:
  2
  

• Number of Processors Installed:
  1
  
• Processor Manufacturer:
  AMD
  
• Processor Type:
  R-Series
  
• Processor Model:
  R1600
  
• Processor Core:
  Dual-core (2 Core)
  
• Processor Speed:
  2.60 GHz
  

• Standard Memory:
  4 GB
  
• Memory Technology:
  DDR4 SDRAM
  

• Ethernet Technology:
  Gigabit Ethernet, 2.5 Gigabit Ethernet
  

• Number of Total Expansion Bays:
  2
  
• Number of 2.5"/3.5" Bays:
  2
  
• Total Number of Expansion Slots:
  2
  

• Controller Type:
  Serial ATA
  
• RAID Supported:
  Yes
  
• RAID Levels:
  0, 1, 5, 6, 10, Basic, Hybrid RAID, JBOD
  

• Drive Interface:
  Serial ATA
  
• Total Number of USB Ports:
  1
  
• Number of USB 3.2 Gen 1 Ports:
  1
  
• Network (RJ-45):
  Yes
  
• Number of Network (RJ-45) Ports:
  2
  

• Protocols:
  SMB 1.0, SMB 2.0, SMB 3.0, NFSv3, NFSv4, NFSv4.1, NFS, iSCSI, HTTP, HTTPS, FTP, SNMP, LDAP, CalDAV, NTFS, FAT, SMB, AFP, WEBDAV, RSync
  

• Maximum Power Supply Wattage:
  65 W
  

• Cooling Fan:
  Yes
  
• Height:
  6.5"
  
• Width:
  4.2"
  
• Depth:
  8.8"
  
• Form Factor:
  Desktop
  
• Compatible Drive Bay Width:
  2.5", 3.5"
  
• Weight (Approximate):
  3.33 lb
  

Hardware Specifications
CPU
CPU Model
AMD Ryzen R1600
CPU Quantity
1
CPU Core
2
CPU Architecture
64-bit
CPU Frequency
2.6 (base) / 3.1 (turbo) GHz
Hardware Encryption Engine
Yes
Memory
System Memory
4 GB DDR4 ECC SODIMM
Memory Module Pre-installed
4 GB (4 GB x 1)
Total Memory Slots
2
Maximum Memory Capacity
32 GB (16 GB x 2)
Notes
- Synology reserves the right to replace memory modules with the same or higher frequency based on suppliers product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
- Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
- For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
Storage
Drive Bays
2
Maximum Drive Bays with Expansion Unit
7 (DX525 x 1)
M.2 Drive Slots
2 (NVMe)
Drive Type (See all supported drives)
- 3.5" SATA HDD
- 2.5" SATA SSD
- M.2 2280 NVMe SSD
Hot Swappable Drive^note
Yes
Notes
- The hot swappable drive feature is not supported by M.2 SSD slots.
- Compatible drives are mandatory. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article.
External Ports
RJ-45 1GbE LAN Port
1
RJ-45 2.5GbE LAN Port
1
USB 3.2 Gen 1 Port
1
Expansion Port
1
Expansion Port Type
USB Type-C
Notes
This devices 1GbE LAN ports have a maximum transmission unit (MTU) size of 1,500 bytes.
Others
System Fan
92 mm x 92 mm x 1 pcs
Fan Speed Mode
- Full-Speed Mode
- Cool Mode
- Quiet Mode
Brightness Adjustable Front LED Indicators
Yes
Power Recovery
Yes
Noise Level^note
17.9 dB(A)
Scheduled Power On / Off
Yes
Wake on LAN / WAN
Yes
Power Supply Unit / Adapter
65 watts
AC Input Power Voltage
100V to 240V AC
Power Frequency
50/60 Hz, Single Phase
Power Consumption^note
20.41 watts (Access)
7.87 watts (HDD Hibernation)
British Thermal Unit
69.61 BTU/hr (Access)
26.84 BTU/hr (HDD Hibernation)
Notes
- For more information on how power consumption is measured, refer to this article.
- Noise testing was conducted with the Synology system fully installed with Synology SATA HDDs and in an idle state. Two G.R.A.S. Type 40AE microphones are placed at a 1 m distance from the front and rear of the device. Background noise: 16.49-17.51 dB(A), Temperature: 24.25-25.75^oC, Humidity: 58.2-61.8%
Temperature
Operating Temperature
0^oC to 40^oC (32^oF to 104^oF)
Storage Temperature
-20^oC to 60^oC (-5^oF to 140^oF)
Operating Humidity
8% to 80% RH
Storage Humidity
5% to 95% RH
Certification
- FCC
- CE
- BSMI
- VCCI
- RCM
- UKCA
- EAC
- CCC
- KC
- BIS
Environment
RoHS Compliant
Packaging Content
- Main Unit X 1
- Accessory Pack X 1
- AC Power Adapter X 1
- AC Power Cord X 1
- RJ-45 LAN Cable X 2
Optional Accessories
- DDR4 ECC SODIMM: D4ES04-4G/D4ES03-8G/D4ES03-16G
- Expansion Units: DX525
- Enterprise Series 3.5" SATA HDD: HAT5300 Series
- Plus Series 3.5" SATA HDD: HAT3300 Series
- Enterprise Series 2.5" SATA SSD: SAT5200 Series
- Enterprise Series M.2 2280 NVMe SSD: SNV3400 and SNV5400 Series
Notes
For multi-module memory configurations, all modules must be identical and share the same model number. Check the Product Manual of your Synology product for recommended memory configurations.
DSM Specifications
Storage Management
Maximum Single Volume Size
- 200 TB (32 GB memory required)
- 108 TB
Maximum Internal Volume Number
32
M.2 SSD Storage Pool Support^note
Yes
SSD Read/Write Cache (Determining cache size)
Yes
SSD TRIM
Yes
Supported RAID Type
- Synology Hybrid RAID
- Basic
- JBOD
- RAID 0
- RAID 1
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
RAID Migration
- Basic to RAID 1
- Basic to RAID 5 (with Expansion Unit)
- RAID 1 to RAID 5 (with Expansion Unit)
- RAID 5 to RAID 6 (with Expansion Unit)
Volume Expansion with Larger HDDs
- Synology Hybrid RAID
- RAID 1
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
Volume Expansion by Adding a HDD
- Synology Hybrid RAID (with Expansion Unit)
- JBOD (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
Global Hot Spare Supported RAID Type
- Synology Hybrid RAID (with Expansion Unit)
- RAID 1 (with Expansion Unit)
- RAID 5 (with Expansion Unit)
- RAID 6 (with Expansion Unit)
- RAID 10 (with Expansion Unit)
Notes
- Volumes over 108 TB require 32 GB of memory or more.
- Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
- Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
- Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments. (Learn more)

File System
Internal Drives
- Btrfs
- ext4
External Drives
- Btrfs
- ext4
- ext3
- FAT32
- NTFS
- HFS+
- exFAT
File Services
File Protocol
- SMB
- AFP
- NFS
- FTP
- WebDAV
- Rsync
Maximum Number of SMB Connections (FSCT-Based)
30
Windows Access Control List (ACL) Integration
Yes
NFS Kerberos Authentication
Yes
Notes
- Connection value of this model is tested with Synology SATA HDD fully populated and all onboard network ports
- Models with expandable memory are tested with the maximum supported quantity installed.
- SMB performance was evaluated using Microsoft File Server Capacity Tool (FSCT) version 1.3, with the following configuration:
Test workload: HomeFolder scenario provided by the FSCT tool
Test duration: 600 seconds
Domain controller and FSCT controller: Windows Server 2022
FSCT clients: 8 x Windows 10 machines
SMB feature: Directory leasing enabled
Account and Shared Folder
Maximum Local User Accounts
512
Maximum Local Groups
128
Maximum Shared Folder
128
Maximum Shared Folder Sync Tasks
4
Hybrid Share
Maximum Hybrid Share Folders
10
Hyper Backup
Folder and Package Backup
Yes
Entire System Backup
Yes
High Availability
Synology High Availability
Yes
Log Center
Syslog Events per Second
800
Virtualization
VMware vSphere
ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0,