Synology DS225 SAN/NAS Storage System - DiskStation + 1 x Intel Celeron J4125 Quad core (4 Core) 2 GHz 2 x HDD Supported 0 x HDD Installed 2 x SSD Supported 0 x SSD Installed 2 GB RAM DDR4 SDRAM Serial ATA Controller RAID Supported 0, 1, Ba

• Number of Hard Drives Supported:
  2
  
• Number of Hard Drives Installed:
  0
  
• Number of Solid State Drive Supported:
  2
  
• Number of Solid State Drive Installed:
  0
  

• Number of Processors Installed:
  1
  
• Processor Manufacturer:
  Intel
  
• Processor Type:
  Celeron
  
• Processor Model:
  J4125
  
• Processor Core:
  Quad-core (4 Core)
  
• Processor Speed:
  2 GHz
  

• Standard Memory:
  2 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
  

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

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

• Operating System:
  DiskStation Manager
  

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

• Number of Power Supplies Installed:
  1
  
• Maximum Power Supply Wattage:
  60 W
  

• Cooling Fan:
  Yes
  
• Height:
  6.5"
  
• Width:
  4.3"
  
• Depth:
  9.1"
  
• Form Factor:
  Desktop
  
• Compatible Drive Bay Width:
  2.5", 3.5"
  
• Weight (Approximate):
  2.87 lb
  

Hardware Specifications
CPU
CPU Model
Intel Celeron J4125
CPU Quantity
1
CPU Core
4
CPU Architecture
64-bit
CPU Frequency
2.0 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
Yes
Memory
System Memory
2 GB DDR4 non-ECC
Total Memory Slots
1
Maximum Memory Capacity
6 GB (2 GB + 4 GB)
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.
Storage
Drive Bays
2
Drive Type (See all supported drives)
- 3.5" SATA HDD
- 2.5" SATA SSD
Hot Swappable Drive
Yes
Notes
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
2
USB Copy
Yes
Notes
MTU value of 1GbE LAN port has a limit of 1500.
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
19.6 dB(A)
Scheduled Power On / Off
Yes
Wake on LAN / WAN
Yes
Power Supply Unit / Adapter
60 watts
AC Input Power Voltage
100V to 240V AC
Power Frequency
50/60 Hz, Single Phase
Power Consumption^note
16.98 watts (Access)
6.08 watts (HDD Hibernation)
British Thermal Unit
57.90 BTU/hr (Access)
20.73 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 non-ECC SODIMM: D4NS01-4G
- Enterprise Series 3.5" SATA HDD: HAT5300 Series
- Plus Series 3.5" SATA HDD: HAT3300 Series
- Enterprise Series 2.5" SATA SSD: SAT5200 Series
DSM Specifications
Storage Management
Maximum Single Volume Size
108 TB
Maximum Internal Volume Number
32
SSD TRIM
Yes
Supported RAID Type
- Synology Hybrid RAID
- Basic
- JBOD
- RAID 0
- RAID 1
RAID Migration
- Basic to RAID 1
Volume Expansion with Larger HDDs
- Synology Hybrid RAID
- RAID 1
Notes
- Each internal volume (may consist of multiple drives) is expandable up to 108TB.
- 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.
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)
5
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
Hybrid Share Folder Number
10
Hyper Backup
Data and Folder Backup
Yes
Entire System Backup
Yes
High Availability
Synology High Availability
Yes
Log Center
Syslog Events per Second
800
General Specifications
Supported Protocols
SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
- Chrome
- Firefox
- Edge
- Safari
Supported Language
English, German, French, Italian, Spanish, Danish, Norwegian, Swedish, Dutch, Russian, Polish, Hungarian, Brazilian Portuguese, European Portuguese, Turkish, Czech, Thai, Japanese, Korean, Traditional Chinese, Simplified Chinese
Notes
For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
Yes