Synology DS1825+ SAN/NAS Storage System - DiskStation 1 x AMD Ryzen V1500B Quad core (4 Core) 2.20 GHz 8 x HDD Supported 0 x HDD Installed 8 x SSD Supported 0 x SSD Installed 8 GB RAM DDR4 SDRAM Serial ATA Controller RAID Supported 0, 1, 5

• Number of Hard Drives Supported:
  8
  
• Number of Hard Drives Installed:
  0
  
• Number of Solid State Drive Supported:
  8
  
• Number of Solid State Drive Installed:
  0
  

• Number of Processors Installed:
  1
  
• Processor Manufacturer:
  AMD
  
• Processor Type:
  Ryzen
  
• Processor Model:
  V1500B
  
• Processor Core:
  Quad-core (4 Core)
  
• Processor Speed:
  2.20 GHz
  

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

• Ethernet Technology:
  2.5 Gigabit Ethernet
  

• Number of Total Expansion Bays:
  8
  
• Number of 2.5"/3.5" Bays:
  8
  
• Total Number of Expansion Slots:
  1
  
• Expansion Slot Type:
  PCI Express 3.0 x8
  

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

• Total Number of USB Ports:
  3
  
• Number of USB 3.2 Gen 1 Ports:
  3
  
• Network (RJ-45):
  Yes
  
• Number of Network (RJ-45) Ports:
  2
  

• Operating System:
  DiskStation Manager
  
• Operating System Supported:
  VMware ESXi 8.0, VMware ESXi 7.0 U1, VMware ESXi 7.0 U2, VMware ESXi 7.0 U3, VMware ESXi 7.0, VMware ESXi 6.7 U1, VMware ESXi 6.7 U2, VMware ESXi 6.7 U3, VMware ESXi 6.7, VMware ESXi 6.5 U1, VMware ESXi 6.5 U2, VMware ESXi 6.5 U3, Windows Server 2022
  

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

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

• Cooling Fan:
  Yes
  
• Height:
  6.5"
  
• Width:
  13.5"
  
• Depth:
  9.6"
  
• Form Factor:
  Desktop
  
• Compatible Drive Bay Width:
  2.5", 3.5"
  
• Weight (Approximate):
  13.23 lb
  

Hardware Specifications
CPU
CPU Model
AMD Ryzen V1500B
CPU Quantity
1
CPU Cores
4
CPU Threads
8
CPU Architecture
64-bit
CPU Frequency
2.2 GHz
Hardware Encryption Engine
Yes
Memory
System Memory
8 GB DDR4 ECC SODIMM
Total Memory Slots
2
Maximum Memory Capacity
32 GB (16 GB x 2)
Notes
- Synology may revise pre-installed memory module specifications in response to component lifecycle and supply conditions. All revised components undergo the same rigorous validation to ensure equivalent compatibility, stability, and 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
8
Maximum Drive Bays with Expansion Unit
18 (DX525 x 2)
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.
- Synology only guarantees full functionality, reliability, and performance for compatible drives. Please consult our compatibility list before purchasing hard drives. For more details, please refer to this article.
External Ports
RJ-45 2.5GbE LAN Port
2
USB 3.2 Gen 1 Port
3
Expansion Port
2
Expansion Port Type
USB Type-C
PCIe
PCIe Expansion
1 x Gen3 x8 slot (x4 link)
Others
System Fan
120 mm x 120 mm x 2 pcs
Fan Speed Mode
- Full-Speed Mode
- Cool Mode
- Quiet Mode
Easy Replacement System Fan
Yes
Brightness Adjustable Front LED Indicators
Yes
Power Recovery
Yes
Noise Level^note
23.8 dB(A)
Scheduled Power On / Off
Yes
Wake on LAN / WAN
Yes
Power Supply Unit / Adapter
250 watts
AC Input Power Voltage
100V to 240V AC
Power Frequency
50/60 Hz, Single Phase
Power Consumption
60.1 watts (Access)
18.34 watts (HDD Hibernation)
British Thermal Unit
204.94 BTU/hr (Access)
62.54 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 Cord X 1
- RJ-45 LAN Cable X 2
Optional Accessories
- DDR4 ECC SODIMM: 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
- 25GbE Network Interface Card: E25G30-F2
- 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1
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
- RAID 6
- RAID 10
RAID Migration
- Basic to RAID 1
- Basic to RAID 5
- RAID 1 to RAID 5
- RAID 5 to RAID 6
Volume Expansion with Larger HDDs
- Synology Hybrid RAID
- RAID 1
- RAID 5
- RAID 6
- RAID 10
Volume Expansion by Adding a HDD
- Synology Hybrid RAID
- JBOD
- RAID 5
- RAID 6
Global Hot Spare Supported RAID Type
- Synology Hybrid RAID
- RAID 1
- RAID 5
- RAID 6
- RAID 10
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)
60
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
1,024
Maximum Local Groups
256
Maximum Shared Folder
256
Maximum Shared Folder Sync Tasks
8
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
1,000
Virtualization
VMware vSphere
ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5
Microsoft Hyper-V
Windows Server 2022
Citrix XenServer
XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
OpenStack
Cinder