1. products list

Comparison results

DS1823xs+ RS2423+
Hardware Specs
Hardware Specifications
CPU
CPU Model AMD Ryzen V1780B AMD Ryzen V1780B
CPU Quantity 1 1
CPU Core 4 4
CPU Architecture 64-bit 64-bit
CPU Frequency 3.35 (base) / 3.6 (turbo) GHz 3.35 (base) / 3.6 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory 8 GB DDR4 ECC SODIMM 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed 8 GB (8 GB x 1) 8 GB (8 GB x 1)
Total Memory Slots 2 2
Maximum Memory Capacity 32 GB (16 GB x 2) 32 GB (16 GB x 2)
Notes
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's 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.
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's 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 8 12
Maximum Drive Bays with Expansion Unit 18 (DX517 x 2) 24 (RX1223RP 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
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
Notes
  • The hot swappable drive feature is not supported by M.2 SSD slots.
  • Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
 Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
External Ports
RJ-45 1GbE LAN Port 2 2
RJ-45 10GbE LAN Port 1 1
Out-of-Band Management LAN Port 1
USB 3.2 Gen 1 Port 3 2
Expansion Port 2 1
Expansion Port Type eSATA Mini-SAS HD
Notes MTU value of 1GbE LAN port has a limit of 1500. MTU value of 1GbE LAN port has a limit of 1500.
PCIe
PCIe Expansion 1 x Gen3 x8 slot (x4 link) 1 x Gen3 x8 slot (x4 link)
Appearance
Form Factor (RU) 2U
Size (Height x Width x Depth) 166 mm x 343 mm x 243 mm 88 mm x 482 mm x 552 mm
Weight 6.2 kg 11.5 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes The rail kit is sold separately
Others
System Fan 120 mm x 120 mm x 2 pcs 60 mm x 60 mm x 3 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Brightness Adjustable Front LED Indicators
Power Recovery
Noise Level* 23.6 dB(A) 52.3 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 250 watts 500 watts
AC Input Power Voltage 100V to 240V AC 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption 87.93 watts (Access)
28.37 watts (HDD Hibernation)		 119.95 watts (Access)
46.21 watts (HDD Hibernation)
British Thermal Unit 300.23 BTU/hr (Access)
96.87 BTU/hr (HDD Hibernation)		 409.56 BTU/hr (Access)
157.78 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 GRAS 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˚C; Humidity: 58.2-61.8%
  • 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 SSDs and in an idle state. Two GRAS 40AE microphones were 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˚C; Humidity: 58.2-61.8%.
Temperature
Operating Temperature 0°C to 40°C (32°F to 104°F) 0°C to 35°C (32°F to 95°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F) -20°C to 60°C (-5°F to 140°F)
Operating Humidity 8% to 80% RH 8% to 80% RH
Storage Humidity 5% to 95% RH 5% to 95% RH
Certification
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • UL
Warranty 5 Years 3-year hardware warranty, extendable to 5 years with Extended Warranty Plus
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
Environment RoHS Compliant RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Quick Installation Guide X 1
Optional Accessories
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.
  • Certain items may not be available in your location. Please contact your local distributors for more information.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
  • 200 TB (32 GB memory required)
  • 108 TB
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number 256 64
M.2 SSD Storage Pool Support*
SSD Read/Write Cache (Determining cache size)
SSD TRIM
RAID Group
Supported RAID Type
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • 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
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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)
  • Actual maximum storage pool and volume sizes vary depending on drives 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.
  • Volumes over 108 TB require DSM 7.2-64570 or above and 32 GB of memory or more.
File System
Internal Drives
  • Btrfs
  • ext4
  • Btrfs
  • ext4
External Drives
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based) 340 380
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE 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 & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
  • 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 & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
Account & Shared Folder
Maximum Local User Accounts 2,048 1,024
Maximum Local Groups 512 256
Maximum Shared Folder 512 256
Maximum Shared Folder Sync Tasks 12 12
Hybrid Share
Hybrid Share Folder Number 15 10
Hyper Backup
Folder and Package Backup
Entire System Backup
Notes Full-system backup requires DSM 7.2 or later. Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
Log Center
Syslog Events per Second 3,000 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 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 Windows Server 2022
Citrix XenServer XenServer 8, Citrix Hypervisor 8.2 LTSR CU1 XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
OpenStack Cinder Cinder
General Specifications
Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Chrome
  • Firefox
  • Edge
  • Safari
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文 English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes For an updated list of supported browser versions, check the DSM Technical Specifications. For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
Synology AI Console
Third-Party AI Model Integration
Maximum De-Identification Rate 340 words per second 380 words per second
Notes
  • De-identification performance measurement: Filters for Credit Card Numbers, IBAN, Individual Taxpayer Identification Number, SSN, and Names applied to a 4,355-word English text.
  • To enable de-identification, your device must have at least 8 GB of memory and Container Manager installed.
  • De-identification performance measurement: Filters for Credit Card Numbers, IBAN, Individual Taxpayer Identification Number, SSN, and Names applied to a 4,355-word English text.
  • To enable de-identification, your device must have at least 8 GB of memory and Container Manager installed.
Synology Chat
Maximum Number of Users 400 150
Notes
  • Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
  • Models with expandable memory are tested with the maximum supported quantity installed.
Download Station
Maximum Concurrent Download Tasks 80 80
SAN Manager
Maximum iSCSI Target Number 64 64
Maximum LUN 128 128
LUN Clone/Snapshot, Windows ODX
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Additional accounts require purchase of licenses) 5 (Additional accounts require purchase of licenses)
Maximum Number of Users 710 790
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
Media Server
DLNA Compliance
Synology Photos
Facial Recognition
Object Recognition
Snapshot Replication
Maximum Snapshots per Shared Folder 256 256
Maximum Snapshots per LUN 64 64
Maximum Snapshots per System 4,096 4,096
Maximum Replication Tasks for Shared Folders 32 32
Maximum Replication Tasks for LUNs 16 16
Maximum Replication Tasks per System 32 32
Surveillance Station
Default Licenses 2 (Additional cameras require purchase of licenses) 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
Maximum IP Cameras and Total FPS (H.265)
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
Notes
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
  • Use NVR Selector to quickly find a suitable model based on your requirements.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
  • Surveillance Station 9.1.3 or above is required to support the maximum IP cameras and FPS figures listed.
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
  • Use NVR Selector to quickly find a suitable model based on your requirements.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
Synology Drive
Maximum Number of Users 610 680
Maximum Number of Hosted Files 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Maximum Number of Users 590 660
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
Recommended Virtual Machine Instances 8 (Learn more) 8 (Learn more)
Recommended Virtual DSM Number (Licenses required) 8 (including 1 Free License) 8 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size. The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 12 12
Hardware Specs
Hardware Specifications
CPU
CPU Model
DS1823xs+ AMD Ryzen V1780B
RS2423+ AMD Ryzen V1780B
CPU Quantity
DS1823xs+ 1
RS2423+ 1
CPU Core
DS1823xs+ 4
RS2423+ 4
CPU Architecture
DS1823xs+ 64-bit
RS2423+ 64-bit
CPU Frequency
DS1823xs+ 3.35 (base) / 3.6 (turbo) GHz
RS2423+ 3.35 (base) / 3.6 (turbo) GHz
Hardware Encryption Engine
DS1823xs+
RS2423+
Memory
System Memory
DS1823xs+ 8 GB DDR4 ECC SODIMM
RS2423+ 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed
DS1823xs+ 8 GB (8 GB x 1)
RS2423+ 8 GB (8 GB x 1)
Total Memory Slots
DS1823xs+ 2
RS2423+ 2
Maximum Memory Capacity
DS1823xs+ 32 GB (16 GB x 2)
RS2423+ 32 GB (16 GB x 2)
Notes
DS1823xs+
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's 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.
RS2423+
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's 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
DS1823xs+ 8
RS2423+ 12
Maximum Drive Bays with Expansion Unit
DS1823xs+ 18 (DX517 x 2)
RS2423+ 24 (RX1223RP x 1)
M.2 Drive Slots
DS1823xs+ 2 (NVMe)
RS2423+
Drive Type (See all supported drives)
DS1823xs+
  • 3.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe SSD
RS2423+
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
DS1823xs+
RS2423+
Notes
DS1823xs+
  • The hot swappable drive feature is not supported by M.2 SSD slots.
  • Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
RS2423+ Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
External Ports
RJ-45 1GbE LAN Port
DS1823xs+ 2
RS2423+ 2
RJ-45 10GbE LAN Port
DS1823xs+ 1
RS2423+ 1
Out-of-Band Management LAN Port
DS1823xs+ 1
RS2423+
USB 3.2 Gen 1 Port
DS1823xs+ 3
RS2423+ 2
Expansion Port
DS1823xs+ 2
RS2423+ 1
Expansion Port Type
DS1823xs+ eSATA
RS2423+ Mini-SAS HD
Notes
DS1823xs+ MTU value of 1GbE LAN port has a limit of 1500.
RS2423+ MTU value of 1GbE LAN port has a limit of 1500.
PCIe
PCIe Expansion
DS1823xs+ 1 x Gen3 x8 slot (x4 link)
RS2423+ 1 x Gen3 x8 slot (x4 link)
Appearance
Form Factor (RU)
DS1823xs+
RS2423+ 2U
Size (Height x Width x Depth)
DS1823xs+ 166 mm x 343 mm x 243 mm
RS2423+ 88 mm x 482 mm x 552 mm
Weight
DS1823xs+ 6.2 kg
RS2423+ 11.5 kg
Rack Installation Support*
DS1823xs+
RS2423+ 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes
DS1823xs+
RS2423+ The rail kit is sold separately
Others
System Fan
DS1823xs+ 120 mm x 120 mm x 2 pcs
RS2423+ 60 mm x 60 mm x 3 pcs
Fan Speed Mode
DS1823xs+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
RS2423+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
DS1823xs+
RS2423+
Brightness Adjustable Front LED Indicators
DS1823xs+
RS2423+
Power Recovery
DS1823xs+
RS2423+
Noise Level*
DS1823xs+ 23.6 dB(A)
RS2423+ 52.3 dB(A)
Scheduled Power On / Off
DS1823xs+
RS2423+
Wake on LAN / WAN
DS1823xs+
RS2423+
Power Supply Unit / Adapter
DS1823xs+ 250 watts
RS2423+ 500 watts
AC Input Power Voltage
DS1823xs+ 100V to 240V AC
RS2423+ 100 V to 240 V AC
Power Frequency
DS1823xs+ 50/60 Hz, Single Phase
RS2423+ 50/60 Hz, Single Phase
Power Consumption
DS1823xs+ 87.93 watts (Access)
28.37 watts (HDD Hibernation)
RS2423+ 119.95 watts (Access)
46.21 watts (HDD Hibernation)
British Thermal Unit
DS1823xs+ 300.23 BTU/hr (Access)
96.87 BTU/hr (HDD Hibernation)
RS2423+ 409.56 BTU/hr (Access)
157.78 BTU/hr (HDD Hibernation)
Notes
DS1823xs+
  • 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 GRAS 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˚C; Humidity: 58.2-61.8%
RS2423+
  • 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 SSDs and in an idle state. Two GRAS 40AE microphones were 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˚C; Humidity: 58.2-61.8%.
Temperature
Operating Temperature
DS1823xs+ 0°C to 40°C (32°F to 104°F)
RS2423+ 0°C to 35°C (32°F to 95°F)
Storage Temperature
DS1823xs+ -20°C to 60°C (-5°F to 140°F)
RS2423+ -20°C to 60°C (-5°F to 140°F)
Operating Humidity
DS1823xs+ 8% to 80% RH
RS2423+ 8% to 80% RH
Storage Humidity
DS1823xs+ 5% to 95% RH
RS2423+ 5% to 95% RH
Certification
DS1823xs+
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
RS2423+
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • UL
Warranty
DS1823xs+ 5 Years
RS2423+ 3-year hardware warranty, extendable to 5 years with Extended Warranty Plus
Notes
DS1823xs+ The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RS2423+
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • Extended Warranty Plus is only available in Europe and North America. Refer to the Extended Warranty Plus website for details on supported countries/regions. (Learn more)
Environment
DS1823xs+ RoHS Compliant
RS2423+ RoHS Compliant
Packaging Content
DS1823xs+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
RS2423+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • Quick Installation Guide X 1
Optional Accessories
DS1823xs+
RS2423+
Notes
DS1823xs+
RS2423+
  • 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.
  • Certain items may not be available in your location. Please contact your local distributors for more information.
Software Specs
DSM Specifications
Storage Management
Maximum Single Volume Size
DS1823xs+
  • 200 TB (32 GB memory required)
  • 108 TB
RS2423+
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number
DS1823xs+ 256
RS2423+ 64
M.2 SSD Storage Pool Support*
DS1823xs+
RS2423+
SSD Read/Write Cache (Determining cache size)
DS1823xs+
RS2423+
SSD TRIM
DS1823xs+
RS2423+
RAID Group
DS1823xs+
RS2423+
Supported RAID Type
DS1823xs+
  • RAID F1
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS2423+
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RAID Migration
DS1823xs+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
RS2423+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
DS1823xs+
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS2423+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
DS1823xs+
  • RAID F1
  • JBOD
  • RAID 5
  • RAID 6
RS2423+
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
DS1823xs+
  • RAID F1
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS2423+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
DS1823xs+
  • Volumes over 108 TB require 32 GB of memory or more.
  • 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)
RS2423+
  • Actual maximum storage pool and volume sizes vary depending on drives 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.
  • Volumes over 108 TB require DSM 7.2-64570 or above and 32 GB of memory or more.
File System
Internal Drives
DS1823xs+
  • Btrfs
  • ext4
RS2423+
  • Btrfs
  • ext4
External Drives
DS1823xs+
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
RS2423+
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
DS1823xs+
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
RS2423+
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based)
DS1823xs+ 340
RS2423+ 380
Windows Access Control List (ACL) Integration
DS1823xs+
RS2423+
NFS Kerberos Authentication
DS1823xs+
RS2423+
Notes
DS1823xs+
  • Connection value of this model is tested with Synology SATA SSD fully populated and up to four 10GbE 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 & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
RS2423+
  • 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 & FSCT controller: Windows Server 2022
    • FSCT clients: 8 × Windows 10 machines
    • SMB feature: Directory leasing enabled
Account & Shared Folder
Maximum Local User Accounts
DS1823xs+ 2,048
RS2423+ 1,024
Maximum Local Groups
DS1823xs+ 512
RS2423+ 256
Maximum Shared Folder
DS1823xs+ 512
RS2423+ 256
Maximum Shared Folder Sync Tasks
DS1823xs+ 12
RS2423+ 12
Hybrid Share
Hybrid Share Folder Number
DS1823xs+ 15
RS2423+ 10
Hyper Backup
Folder and Package Backup
DS1823xs+
RS2423+
Entire System Backup
DS1823xs+
RS2423+
Notes
DS1823xs+ Full-system backup requires DSM 7.2 or later.
RS2423+ Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
DS1823xs+
RS2423+
Log Center
DS1823xs+
RS2423+
Syslog Events per Second
DS1823xs+ 3,000
RS2423+ 1,000
Virtualization
VMware vSphere
DS1823xs+ 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
RS2423+ 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
DS1823xs+ Windows Server 2022
RS2423+ Windows Server 2022
Citrix XenServer
DS1823xs+ XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
RS2423+ XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
OpenStack
DS1823xs+ Cinder
RS2423+ Cinder
General Specifications
Supported Protocols
DS1823xs+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, Fibre Channel, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
RS2423+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
DS1823xs+
  • Chrome
  • Firefox
  • Edge
  • Safari
RS2423+
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language
DS1823xs+ English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
RS2423+ English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes
DS1823xs+ For an updated list of supported browser versions, check the DSM Technical Specifications.
RS2423+ For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
DS1823xs+
RS2423+
Synology AI Console
DS1823xs+
RS2423+
Third-Party AI Model Integration
DS1823xs+
RS2423+
Maximum De-Identification Rate
DS1823xs+ 340 words per second
RS2423+ 380 words per second
Notes
DS1823xs+
  • De-identification performance measurement: Filters for Credit Card Numbers, IBAN, Individual Taxpayer Identification Number, SSN, and Names applied to a 4,355-word English text.
  • To enable de-identification, your device must have at least 8 GB of memory and Container Manager installed.
RS2423+
  • De-identification performance measurement: Filters for Credit Card Numbers, IBAN, Individual Taxpayer Identification Number, SSN, and Names applied to a 4,355-word English text.
  • To enable de-identification, your device must have at least 8 GB of memory and Container Manager installed.
Synology Chat
DS1823xs+
RS2423+
Maximum Number of Users
DS1823xs+ 400
RS2423+ 150
Notes
DS1823xs+
  • Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
  • Models with expandable memory are tested with the maximum supported quantity installed.
RS2423+
  • Measured with simulated users, each with an average record of 20,000 messages, emojis, or stickers. The required server response time is below ten seconds.
  • Models with expandable memory are tested with the maximum supported quantity installed.
Download Station
DS1823xs+
RS2423+
Maximum Concurrent Download Tasks
DS1823xs+ 80
RS2423+ 80
SAN Manager
DS1823xs+
RS2423+
Maximum iSCSI Target Number
DS1823xs+ 64
RS2423+ 64
Maximum LUN
DS1823xs+ 128
RS2423+ 128
LUN Clone/Snapshot, Windows ODX
DS1823xs+
RS2423+
Synology MailPlus / MailPlus Server
DS1823xs+
RS2423+
Free Email Accounts
DS1823xs+ 5 (Additional accounts require purchase of licenses)
RS2423+ 5 (Additional accounts require purchase of licenses)
Maximum Number of Users
DS1823xs+ 710
RS2423+ 790
Notes
DS1823xs+
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
RS2423+
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
Media Server
DS1823xs+
RS2423+
DLNA Compliance
DS1823xs+
RS2423+
Synology Photos
DS1823xs+
RS2423+
Facial Recognition
DS1823xs+
RS2423+
Object Recognition
DS1823xs+
RS2423+
Snapshot Replication
DS1823xs+
RS2423+
Maximum Snapshots per Shared Folder
DS1823xs+ 256
RS2423+ 256
Maximum Snapshots per LUN
DS1823xs+ 64
RS2423+ 64
Maximum Snapshots per System
DS1823xs+ 4,096
RS2423+ 4,096
Maximum Replication Tasks for Shared Folders
DS1823xs+ 32
RS2423+ 32
Maximum Replication Tasks for LUNs
DS1823xs+ 16
RS2423+ 16
Maximum Replication Tasks per System
DS1823xs+ 32
RS2423+ 32
Surveillance Station
DS1823xs+
RS2423+
Default Licenses
DS1823xs+ 2 (Additional cameras require purchase of licenses)
RS2423+ 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)
DS1823xs+
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
RS2423+
  • 1080p: 75 channels, 2100 FPS
  • 3M: 75 channels, 1500 FPS
  • 5M: 75 channels, 900 FPS
  • 4K: 55 channels, 550 FPS
Maximum IP Cameras and Total FPS (H.265)
DS1823xs+
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
RS2423+
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
Notes
DS1823xs+
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
  • Use NVR Selector to quickly find a suitable model based on your requirements.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
RS2423+
  • Surveillance Station 9.1.3 or above is required to support the maximum IP cameras and FPS figures listed.
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
  • Use NVR Selector to quickly find a suitable model based on your requirements.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
Synology Drive
DS1823xs+
RS2423+
Maximum Number of Users
DS1823xs+ 610
RS2423+ 680
Maximum Number of Hosted Files
DS1823xs+ 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
RS2423+ 5,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Notes
DS1823xs+
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
RS2423+
  • The suggested maximum number of users is based on the following workload: 20% of users randomly perform file operations (upload, download, move, and delete), and 80% of users are logged in but idle. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
DS1823xs+
RS2423+
Maximum Number of Users
DS1823xs+ 590
RS2423+ 660
Notes
DS1823xs+
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
RS2423+
  • The suggested maximum number of users is based on the following workload: 20% of users are executing random actions at an average of 30-second intervals, and 80% of users are logged in and viewing a file. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager
DS1823xs+
RS2423+
Recommended Virtual Machine Instances
DS1823xs+ 8 (Learn more)
RS2423+ 8 (Learn more)
Recommended Virtual DSM Number (Licenses required)
DS1823xs+ 8 (including 1 Free License)
RS2423+ 8 (including 1 Free License)
Notes
DS1823xs+ The specifications vary depending on system configuration and memory size.
RS2423+ The specifications vary depending on system configuration and memory size.
VPN Server
DS1823xs+
RS2423+
Maximum Connections
DS1823xs+ 12
RS2423+ 12