Synology RackStation RS2421+ / RS2421RP+
High-performance, general purpose storage solution for small to medium sized businesses
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Synology RackStation RS2421+ and RS2421RP+ (redundant power) are 2U 12- bay rackmount NAS with cost-effective file management, sharing, and backup capabilities, specially designed for small business and remote office deployments. Powered by Synology’s DiskStation Manager (DSM), RS2421(RP)+ units come with powerful built-in business services and can easily be expanded with SSD cache and 10/25GbE networking capabilities.
- High Performance
Support critical workloads with up to 2,200 MB/s read and 1,154 MB/s write performance
- Redundant Power
Maximize uptime with two redundant power supply units (RS2421RP+)
- Expansion Options
Scale up to 24 drives with the RX1217(RP) and add 10/25GbE networking or fast NVMe SSD Cache with PCIe add-in cards
- High Availability
Combine two devices into a Synology High Availability cluster for maximum service uptime and minute-level failover
- Extendable Warranty
Includes a 3-year limited warranty with an optional extension to 5 years
AMD Ryzen V1500B quad-core 2.2 GHz
2,200 MB/s seq. read and 1154 MB/s seq. write performance
4 GB ECC DDR4, up to 32 GB
Up to 24 drive bays with RX1217(RP)
Built for reliability
Reduce the possibility of power disruptions on a single distribution channel or PDU adversely impacting data and service availability.
Pair two identical devices with Synology High Availability and enable automatic minute-level failover between both devices in the event one server fails.
Data integrity and protection
ECC memory brings higher system reliability, while the Btrfs file system helps prevent data corruption, supports snapshot technology, and simplifies data protection.
Customize to suit
Easily adapt RS2421+/RS2421RP to any business environment by adding faster networking, local SSD cache, or storage capacity.
Support for 10/25GbE NICs lets you boost maximum network throughput using Link Aggregation (bonding).
Boost read/write IOPS over HDD-only arrays by up to 16 times or more with NVMe or SATA SSD Cache.
Expand to 24 drive bays with a RX1217(RP) expansion unit.
License-free backup solutions
Protect your data with professional backup software for your Synology NAS, other devices, and applications.
Consolidate backups to your NAS
Active Backup Suite
Securely back up Windows clients and servers, Microsoft 365 and Google Workspace accounts, file servers, and VMware® and Hyper-V® virtual machines with the Active Backup Suite. Leverage built-in deduplication technology to reduce backup sizes and multi-versioning to allow flexible restoration.
Back up your NAS to other devices
Back up files, LUNs, installed applications, and system configurations to destinations including Synology C2 Storage, public cloud platforms, USB devices, file servers, local folders, or other Synology NAS. Set and forget backup tasks with regular schedules, enhance security with fine-grained user permissions and encryption, keep backup sizes small with built-in deduplication, and restore data flexibly with multi-versioning.
Snapshot Replication enables configurable point-in-time snapshots of shared folders and virtual machines with an RPO as low as 5 minutes and recovery within seconds.
Get your business ready for remote work
Keep your remote workforce connected with powerful out-of-the-box solutions for collaboration, file sharing, and communication.
Host your own private cloud behind the safety of your NAS with 100% data ownership and no subscription fees.
Collaborate in real time on documents, spreadsheets, and slides for greater synergy and productivity.
Discuss and collaborate with colleagues using secure messaging designed for teams, with mobile, desktop, and browser clients.
Storage for virtualization
Synology DiskStation Manager (DSM) streamlines provisioning for and management of virtual machines with full certification for VMware vSphere, Microsoft Hyper-V, Citrix XenServer, and OpenStack virtualization environments.
Synology Storage Console for VMware or Windows platforms lets you manage storage directly from your hypervisor. VMware VAAI integration and Windows ODX help offload storage operations and speed up data transfer.
Powered by Synology DiskStation Manager
The web-based DiskStation Manager (DSM) operating system supports a host of native productivity and management solutions.
Central Management System
Conveniently manage your fleet of Synology NAS from a centralized console.
Instantly access your NAS files across multiple devices whenever you want, wherever you are.
Complete surveillance solution for recording, monitoring, and management.
Virtual Machine Manager
Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
Secure data with comprehensive built-in security tools to protect your devices against evolving threats.
Complete surveillance solution for recording, monitoring, and management.
- Power button and indicator
- Status indicator
- Alert indicator
- Alert Off Button
- Drive tray
- Drive status indicator
- Rail Kit Release Tab
- Power Port
- PSU Indicators & Alert Off Buttons (RS2421RP+)
- PSU fan
- PSU on/off switch
- Console port
- 1GbE RJ-45 port
- USB 3.2 Ports
- Expansion port
- Reset button
- PCIe expansion slot
|RS2421+/RS2421RP+ Hardware Specifications:|
|CPU||AMD Ryzen V1500B quad-core 2.2 GHz|
|Hardware encryption engine||Yes (AES-NI)|
|Memory||4 GB DDR4 ECC UDIMM (expandable up to 32 GB)|
|Compatible drive type||
|Hot swappable drive||Yes|
|Form factor||Rackmount 2U|
|Size (Height x Width x Depth)||
|Rack installation support||4-post 19" rack|
|LAN port||4 x 1GbE RJ-45|
|Wake on LAN/WAN||Yes|
|Scheduled power on/of||Yes|
|System fans||3 x (60 x 60 x 38 mm)|
|AC input power voltage||100 V to 240 V AC|
|Power Frequency||50/60 Hz, single phase|
|Operating Temperature||0°C to 35°C (32°F to 95°F)|
|Storage Temperature||-20°C to 60°C (-5°F to 140°F)|
|Relative Humidity||5% to 95% RH|
|Maximum operating altitude||5,000 m (16,400 ft)|
|General DSM specification|
|Networking protocol||SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN™, L2TP)|
|Supported RAID type||Synology Hybrid RAID, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10|
|File sharing capability||
|Privilege||Windows Access Control List (ACL), application privileges|
|Directory service||Connects with Windows AD/LDAP servers enabling domain users to login via SMB/NFS/AFP/FTP/File Station using their existing credentials|
|Virtualization||VMware vSphere, Microsoft Hyper-V, Citrix, OpenStack|
|Security||Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt support, and HTTPS (customizable cipher suite)|
|Supported clients||Windows 7 onwards, macOS 10.12 onwards|
|Supported browser||Google Chrome, Firefox, Microsoft Edge, Safari 13 and later, and Safari (iOS 13.0 and later) on iPad, Chrome (Android 11.0 and later) on tablets|
|File Server & Synchronization|
|Cloud Sync||Offers one or two-way synchronization with public cloud storage providers including Alibaba Cloud OSS, Backblaze B2, Baidu Cloud, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, MegaDisk, Microsoft OneDrive, OpenStack Swift-compatible storage, Tencent COS, WebDAV servers and Yandex Disk|
|Drive||Synchronizes files across Windows, macOS, Linux, Android and iOS. The built-in cross-platform portal allows access to data anytime and anywhere
|File Station||Provides virtual drives, remote folders, Windows ACL editor, compression/extraction of archived files, bandwidth control for specific users/groups, creation of sharing links, and transfer logs|
|FTP Server||Supports bandwidth control for TCP connections, custom FTP passive port ranges, anonymous FTP, FTP over TLS/SSL and SFTP protocols, network booting with TFTP and PXE support, and transfer logs.|
|Presto File Server||Enables high-speed data transfer over WAN through the exclusive SITA technology between Synology NAS and desktop platforms.|
|Universal Search||Enables global search of applications and files.|
|iSCSI Storage & Virtualization|
|Virtual Machine Manager||Deploys and runs virtual machines on the Synology NAS, including Windows, Linux, and Virtual DSM|
|Data Protection & Backup Solution|
|Active Backup for Business||An all-in-one backup solution designed for heterogeneous business IT environments. It enables IT admins to remotely manage and protect PCs, servers, and VMs from one centralized console|
|Active Backup for Google Workspace||Supports backup and restoration of Google Workspace My Drive, Team Drive, Gmail, Contacts, and Calendar|
|Active Backup for Microsoft 365||Supports backup and restoration of Microsoft 365 OneDrive for Business, Outlook, Contacts, and Calendar|
|Hyper Backup||Supports local backup, network backup, and data backup to public clouds.|
|Synology High Availability||Reduces service downtime by combining two identical NAS into a high-availability cluster|
|Productivity & Collaboration|
|Collaboration tools||Collaborate with instant messaging service Synology Chat, online documents editor Synology Office, and scheduling assistant Synology Calendar
|Note Station||A note taking platform that supports rich text, note organization and versioning, encryption, sharing, media embedding, and attachments|
|Synology MailPlus Server||A secure, reliable, and private mail solution that offers high-availability, load balancing, security, and filtering options.|
|Synology MailPlus||An intuitive webmail interface for Synology MailPlus Server with customizable mail labels, filters, and user interface.|
|Moments||A feature-rich photo management application that includes AI-powered album creation from facial and subject recognition, photo editing and sharing capabilities, similar photo detection for duplicate management, auto-editing functions such as color correction and angle adjustments, and auto-selection of the best shots. Mobile applications are available on iOS and Android devices.|
|Other packages||Video Station, Photo Station, Audio Station, iTunes Server|
|Surveillance Station||Maximum IP cameras: 40, for a total of 1,200 FPS at 720p (H.264).|
|Central Management System||Provides a single interface to manage and monitor multiple Synology NAS models|
|Synology Directory Server||Provide a flexible and cost-effective domain controller solution|
|Mail Station||A webmail interface for Mail Server to receive emails from multiple POP3 mailboxes and SMTP servers.|
|Web Station||Enables hosting for up to 30 websites with support for PHP/MariaDB and 3rd-party applications.|
|Other packages||DNS Server, RADIUS Server, and Log Center|
|Storage Analyzer||Displays volume and quota usage, total size of files, volume usage and trends based on past usage, size of shared folders, large files, most recently modified files, and least recently accessed files.|
|Antivirus Essential||Provides full system scans, scheduled scans, white list customization, and auto-update of virus definitions.|
|iOS/Android applications||Synology Drive, Synology MailPlus, Synology Secure SignIn, Synology Chat, Synology LiveCam, Synology Photos, Synology Active Insight, DS audio, DS photo, DS video, DS cam, DS file, DS finder, and DS note|
|Other packages||Additional 3rd-party packages are available in the Package Center|
|Environment and Packaging|
|Environment safety||RoHS compliant|
Download the Synology RackStation RS2421+/RS2421RP+ Datasheet (PDF).
- Pricing and product availability subject to change without notice.
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