1. products list

Comparison results

RS1221RP+ RS2423RP+
Hardware Specs
Hardware Specifications
CPU
CPU Model AMD Ryzen V1500B AMD Ryzen V1780B
CPU Quantity 1 1
CPU Core 4 4
CPU Architecture 64-bit 64-bit
CPU Frequency 2.2 GHz 3.35 (base) / 3.6 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory 4 GB DDR4 ECC SODIMM 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed 4 GB (4 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 12 (RX418 x 1) 24 (RX1223RP x 1)
Drive Type (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
Notes 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 4 2
RJ-45 10GbE LAN Port 1
USB 3.2 Gen 1 Port 2 2
Expansion Port 1 1
Expansion Port Type eSATA Mini-SAS HD
Notes 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 2U
Size (Height x Width x Depth) 88 mm x 482 mm x 407.5 mm 88 mm x 482 mm x 578 mm
Weight 8.4 kg 11.9 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS-02) 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes The rail kit is sold separately The rail kit is sold separately
Others
System Fan 80 mm x 80 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
Power Recovery
Noise Level* 53.5 dB(A) 56.2 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 350 watts 350 watts
Redundant Power Supply
AC Input Power Voltage 100 V to 240 V AC 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase 50/60 Hz, Single Phase
Power Consumption 61.94 watts (Access)
29.98 watts (HDD Hibernation)		 114.86 watts (Access)
42.33 watts (HDD Hibernation)
British Thermal Unit 211.35 BTU/hr (Access)
102.30 BTU/hr (HDD Hibernation)		 392.18 BTU/hr (Access)
144.53 BTU/hr (HDD Hibernation)
Notes
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. 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 G.R.A.S. type 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 35°C (32°F to 95°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
  • UL
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty 3-year hardware warranty, extendable to 5 years with EW202 3-year hardware warranty, extendable to 5 years with EW202
Notes
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • EW201/EW202 is only available in Asia, Africa, and Oceania. Refer to the Extended Warranty website for details on supported countries/regions. (Learn more)
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • EW201/EW202 is only available in Asia, Africa, and Oceania. Refer to the Extended Warranty 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 2
  • Quick Installation Guide X 1
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
Notes
  • All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
  • Upgrade DSM to version 7.2-64551 or onward before installing M2D18.
  • 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 108 TB
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number 64 64
SSD Read/Write Cache (Determining cache size)
SSD TRIM
Supported RAID Type
  • Synology Hybrid RAID
  • 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
  • Synology Hybrid RAID
  • 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
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
  • 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
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
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.
  • 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.
  • 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) 180 380
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
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 & 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 1,024 1,024
Maximum Local Groups 256 256
Maximum Shared Folder 256 256
Maximum Shared Folder Sync Tasks 8 12
Hybrid Share
Hybrid Share Folder Number 10 10
Hyper Backup
Data & Folder 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 1,000 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 2019, Windows Server 2016 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, 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 180 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 150 150
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 380 790
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: 40 channels, 1050 FPS
  • 3M: 40 channels, 600 FPS
  • 5M: 40 channels, 440 FPS
  • 4K: 32 channels, 320 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: 40 channels, 1200 FPS
  • 3M: 40 channels, 1120 FPS
  • 5M: 40 channels, 600 FPS
  • 4K: 40 channels, 480 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 320 680
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 320 660
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 8 12
Hardware Specs
Hardware Specifications
CPU
CPU Model
RS1221RP+ AMD Ryzen V1500B
RS2423RP+ AMD Ryzen V1780B
CPU Quantity
RS1221RP+ 1
RS2423RP+ 1
CPU Core
RS1221RP+ 4
RS2423RP+ 4
CPU Architecture
RS1221RP+ 64-bit
RS2423RP+ 64-bit
CPU Frequency
RS1221RP+ 2.2 GHz
RS2423RP+ 3.35 (base) / 3.6 (turbo) GHz
Hardware Encryption Engine
RS1221RP+
RS2423RP+
Memory
System Memory
RS1221RP+ 4 GB DDR4 ECC SODIMM
RS2423RP+ 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed
RS1221RP+ 4 GB (4 GB x 1)
RS2423RP+ 8 GB (8 GB x 1)
Total Memory Slots
RS1221RP+ 2
RS2423RP+ 2
Maximum Memory Capacity
RS1221RP+ 32 GB (16 GB x 2)
RS2423RP+ 32 GB (16 GB x 2)
Notes
RS1221RP+
  • 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.
RS2423RP+
  • 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
RS1221RP+ 8
RS2423RP+ 12
Maximum Drive Bays with Expansion Unit
RS1221RP+ 12 (RX418 x 1)
RS2423RP+ 24 (RX1223RP x 1)
Drive Type (See all supported drives)
RS1221RP+
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
RS2423RP+
  • 3.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
RS1221RP+
RS2423RP+
Notes
RS1221RP+
RS2423RP+ 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
RS1221RP+ 4
RS2423RP+ 2
RJ-45 10GbE LAN Port
RS1221RP+
RS2423RP+ 1
USB 3.2 Gen 1 Port
RS1221RP+ 2
RS2423RP+ 2
Expansion Port
RS1221RP+ 1
RS2423RP+ 1
Expansion Port Type
RS1221RP+ eSATA
RS2423RP+ Mini-SAS HD
Notes
RS1221RP+
RS2423RP+ MTU value of 1GbE LAN port has a limit of 1500.
PCIe
PCIe Expansion
RS1221RP+ 1 x Gen3 x8 slot (x4 link)
RS2423RP+ 1 x Gen3 x8 slot (x4 link)
Appearance
Form Factor (RU)
RS1221RP+ 2U
RS2423RP+ 2U
Size (Height x Width x Depth)
RS1221RP+ 88 mm x 482 mm x 407.5 mm
RS2423RP+ 88 mm x 482 mm x 578 mm
Weight
RS1221RP+ 8.4 kg
RS2423RP+ 11.9 kg
Rack Installation Support*
RS1221RP+ 4-post 19" rack (Synology Rail Kit - RKS-02)
RS2423RP+ 4-post 19" rack (Synology Rail Kit - RKS-02)
Notes
RS1221RP+ The rail kit is sold separately
RS2423RP+ The rail kit is sold separately
Others
System Fan
RS1221RP+ 80 mm x 80 mm x 2 pcs
RS2423RP+ 60 mm x 60 mm x 3 pcs
Fan Speed Mode
RS1221RP+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
RS2423RP+
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
RS1221RP+
RS2423RP+
Power Recovery
RS1221RP+
RS2423RP+
Noise Level*
RS1221RP+ 53.5 dB(A)
RS2423RP+ 56.2 dB(A)
Scheduled Power On / Off
RS1221RP+
RS2423RP+
Wake on LAN / WAN
RS1221RP+
RS2423RP+
Power Supply Unit / Adapter
RS1221RP+ 350 watts
RS2423RP+ 350 watts
Redundant Power Supply
RS1221RP+
RS2423RP+
AC Input Power Voltage
RS1221RP+ 100 V to 240 V AC
RS2423RP+ 100 V to 240 V AC
Power Frequency
RS1221RP+ 50/60 Hz, Single Phase
RS2423RP+ 50/60 Hz, Single Phase
Power Consumption
RS1221RP+ 61.94 watts (Access)
29.98 watts (HDD Hibernation)
RS2423RP+ 114.86 watts (Access)
42.33 watts (HDD Hibernation)
British Thermal Unit
RS1221RP+ 211.35 BTU/hr (Access)
102.30 BTU/hr (HDD Hibernation)
RS2423RP+ 392.18 BTU/hr (Access)
144.53 BTU/hr (HDD Hibernation)
Notes
RS1221RP+
  • Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
  • Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
RS2423RP+
  • 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 G.R.A.S. type 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
RS1221RP+ 0°C to 35°C (32°F to 95°F)
RS2423RP+ 0°C to 35°C (32°F to 95°F)
Storage Temperature
RS1221RP+ -20°C to 60°C (-5°F to 140°F)
RS2423RP+ -20°C to 60°C (-5°F to 140°F)
Operating Humidity
RS1221RP+ 8% to 80% RH
RS2423RP+ 8% to 80% RH
Storage Humidity
RS1221RP+ 5% to 95% RH
RS2423RP+ 5% to 95% RH
Certification
RS1221RP+
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • EAC
  • CCC
  • KC
  • BIS
  • UL
RS2423RP+
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • BIS
  • UL
Warranty
RS1221RP+ 3-year hardware warranty, extendable to 5 years with EW202
RS2423RP+ 3-year hardware warranty, extendable to 5 years with EW202
Notes
RS1221RP+
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • EW201/EW202 is only available in Asia, Africa, and Oceania. Refer to the Extended Warranty website for details on supported countries/regions. (Learn more)
RS2423RP+
  • The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
  • EW201/EW202 is only available in Asia, Africa, and Oceania. Refer to the Extended Warranty website for details on supported countries/regions. (Learn more)
Environment
RS1221RP+ RoHS Compliant
RS2423RP+ RoHS Compliant
Packaging Content
RS1221RP+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
RS2423RP+
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories
RS1221RP+
RS2423RP+
Notes
RS1221RP+
  • All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
  • Upgrade DSM to version 7.2-64551 or onward before installing M2D18.
RS2423RP+
  • 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
RS1221RP+ 108 TB
RS2423RP+
  • 200 TB (32 GB memory required)
  • 108 TB
Maximum Internal Volume Number
RS1221RP+ 64
RS2423RP+ 64
SSD Read/Write Cache (Determining cache size)
RS1221RP+
RS2423RP+
SSD TRIM
RS1221RP+
RS2423RP+
Supported RAID Type
RS1221RP+
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS2423RP+
  • Synology Hybrid RAID
  • Basic
  • JBOD
  • RAID 0
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RAID Migration
RS1221RP+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
RS2423RP+
  • Basic to RAID 1
  • Basic to RAID 5
  • RAID 1 to RAID 5
  • RAID 5 to RAID 6
Volume Expansion with Larger HDDs
RS1221RP+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS2423RP+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Volume Expansion by Adding a HDD
RS1221RP+
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
RS2423RP+
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
RS1221RP+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
RS2423RP+
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
RS1221RP+
  • 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.
RS2423RP+
  • 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.
  • Volumes over 108 TB require DSM 7.2-64570 or above and 32 GB of memory or more.
File System
Internal Drives
RS1221RP+
  • Btrfs
  • ext4
RS2423RP+
  • Btrfs
  • ext4
External Drives
RS1221RP+
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
RS2423RP+
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Services
File Protocol
RS1221RP+
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
RS2423RP+
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Number of SMB Connections (FSCT-Based)
RS1221RP+ 180
RS2423RP+ 380
Windows Access Control List (ACL) Integration
RS1221RP+
RS2423RP+
NFS Kerberos Authentication
RS1221RP+
RS2423RP+
Notes
RS1221RP+
  • 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
RS2423RP+
  • 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
RS1221RP+ 1,024
RS2423RP+ 1,024
Maximum Local Groups
RS1221RP+ 256
RS2423RP+ 256
Maximum Shared Folder
RS1221RP+ 256
RS2423RP+ 256
Maximum Shared Folder Sync Tasks
RS1221RP+ 8
RS2423RP+ 12
Hybrid Share
Hybrid Share Folder Number
RS1221RP+ 10
RS2423RP+ 10
Hyper Backup
Data & Folder Backup
RS1221RP+
RS2423RP+
Entire System Backup
RS1221RP+
RS2423RP+
Notes
RS1221RP+ Full-system backup requires DSM 7.2 or later.
RS2423RP+ Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
RS1221RP+
RS2423RP+
Log Center
RS1221RP+
RS2423RP+
Syslog Events per Second
RS1221RP+ 1,000
RS2423RP+ 1,000
Virtualization
VMware vSphere
RS1221RP+ 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
RS2423RP+ 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
RS1221RP+ Windows Server 2022, Windows Server 2019, Windows Server 2016
RS2423RP+ Windows Server 2022
Citrix XenServer
RS1221RP+ XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
RS2423RP+ XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
OpenStack
RS1221RP+ Cinder
RS2423RP+ Cinder
General Specifications
Supported Protocols
RS1221RP+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
RS2423RP+ SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
RS1221RP+
  • Chrome
  • Firefox
  • Edge
  • Safari
RS2423RP+
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language
RS1221RP+ 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
RS2423RP+ 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
RS1221RP+ For an updated list of supported browser versions, check the DSM Technical Specifications.
RS2423RP+ For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System
RS1221RP+
RS2423RP+
Synology AI Console
RS1221RP+
RS2423RP+
Third-Party AI Model Integration
RS1221RP+
RS2423RP+
Maximum De-Identification Rate
RS1221RP+ 180 words per second
RS2423RP+ 380 words per second
Notes
RS1221RP+
  • 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.
RS2423RP+
  • 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
RS1221RP+
RS2423RP+
Maximum Number of Users
RS1221RP+ 150
RS2423RP+ 150
Notes
RS1221RP+
  • 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.
RS2423RP+
  • 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
RS1221RP+
RS2423RP+
Maximum Concurrent Download Tasks
RS1221RP+ 80
RS2423RP+ 80
SAN Manager
RS1221RP+
RS2423RP+
Maximum iSCSI Target Number
RS1221RP+ 64
RS2423RP+ 64
Maximum LUN
RS1221RP+ 128
RS2423RP+ 128
LUN Clone/Snapshot, Windows ODX
RS1221RP+
RS2423RP+
Synology MailPlus / MailPlus Server
RS1221RP+
RS2423RP+
Free Email Accounts
RS1221RP+ 5 (Additional accounts require purchase of licenses)
RS2423RP+ 5 (Additional accounts require purchase of licenses)
Maximum Number of Users
RS1221RP+ 380
RS2423RP+ 790
Notes
RS1221RP+
  • 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).
RS2423RP+
  • 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
RS1221RP+
RS2423RP+
DLNA Compliance
RS1221RP+
RS2423RP+
Synology Photos
RS1221RP+
RS2423RP+
Facial Recognition
RS1221RP+
RS2423RP+
Object Recognition
RS1221RP+
RS2423RP+
Snapshot Replication
RS1221RP+
RS2423RP+
Maximum Snapshots per Shared Folder
RS1221RP+ 256
RS2423RP+ 256
Maximum Snapshots per LUN
RS1221RP+ 64
RS2423RP+ 64
Maximum Snapshots per System
RS1221RP+ 4,096
RS2423RP+ 4,096
Maximum Replication Tasks for Shared Folders
RS1221RP+ 32
RS2423RP+ 32
Maximum Replication Tasks for LUNs
RS1221RP+ 16
RS2423RP+ 16
Maximum Replication Tasks per System
RS1221RP+ 32
RS2423RP+ 32
Surveillance Station
RS1221RP+
RS2423RP+
Default Licenses
RS1221RP+ 2 (Additional cameras require purchase of licenses)
RS2423RP+ 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)
RS1221RP+
  • 1080p: 40 channels, 1050 FPS
  • 3M: 40 channels, 600 FPS
  • 5M: 40 channels, 440 FPS
  • 4K: 32 channels, 320 FPS
RS2423RP+
  • 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)
RS1221RP+
  • 1080p: 40 channels, 1200 FPS
  • 3M: 40 channels, 1120 FPS
  • 5M: 40 channels, 600 FPS
  • 4K: 40 channels, 480 FPS
RS2423RP+
  • 1080p: 75 channels, 2250 FPS
  • 3M: 75 channels, 2250 FPS
  • 5M: 75 channels, 1500 FPS
  • 4K: 75 channels, 900 FPS
Notes
RS1221RP+
  • 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.
RS2423RP+
  • 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
RS1221RP+
RS2423RP+
Maximum Number of Users
RS1221RP+ 320
RS2423RP+ 680
Maximum Number of Hosted Files
RS1221RP+ 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)
RS2423RP+ 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
RS1221RP+
  • 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.
RS2423RP+
  • 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
RS1221RP+
RS2423RP+
Maximum Number of Users
RS1221RP+ 320
RS2423RP+ 660
Notes
RS1221RP+
  • 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
RS2423RP+
  • 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
RS1221RP+
RS2423RP+
Recommended Virtual Machine Instances
RS1221RP+ 8 (Learn more)
RS2423RP+ 8 (Learn more)
Recommended Virtual DSM Number (Licenses required)
RS1221RP+ 8 (including 1 Free License)
RS2423RP+ 8 (including 1 Free License)
Notes
RS1221RP+ The specifications vary depending on system configuration and memory size.
RS2423RP+ The specifications vary depending on system configuration and memory size.
VPN Server
RS1221RP+
RS2423RP+
Maximum Connections
RS1221RP+ 8
RS2423RP+ 12