RackStation® RS2821RP+
High-performance storage for data protection, file serving, and more.
High performance storage for anything
Over 105K/59K random read/write IOPS and up to 2,220/1,164 MB/s sequential read/write throughput ensure ample performance for demanding workloads.
Built for reliability
Redundant power
Reduce the possibility of power disruptions on a single distribution channel or PDU adversely impacting data and service availability.
Near-zero downtime
Pair two identical devices with Synology High Availability and enable automatic minute-level failover between both devices in the event one server fails. Learn more
Data integrity and protection
ECC memory prevents data corruption, while the Btrfs file system brings higher reliability, snapshot technology, and simplified data protection. Learn more
Hyper Backup
Back up files, iSCSI 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
Snapshot Replication
Snapshot Replication enables flexible point-in-time snapshots of shared folders, and virtual machines with an RPO as low as 5 minutes and recovery within seconds. Learn more
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 deduplication4 technology to reduce backup sizes and multi-versioning to allow flexible restoration. Learn more
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. Learn more
Works best with Synology drives
Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.




Central Management System
Conveniently manage your fleet of Synology NAS from a centralized console.
Synology Drive
Instantly access your NAS files across multiple devices whenever you want, wherever you are.
Collaboration Suite
Satisfy all team collaboration needs behind the safety of your own private cloud with Synology Office, Calendar, and Chat.
Virtual Machine Manager
Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
Security
Secure data with comprehensive built-in security tools to protect your devices against evolving threats.
Surveillance Station
Complete surveillance solution for recording, monitoring, and management.
Get extra protection with Extended Warranty Plus
Extend the standard 3-year hardware warranty of your RS2821RP+ with 2 more years of Synology-certified support and premium services that help you recover faster in the event of disaster.
- 1Power button and indicator
- 2Status Indicator
- 3Alert Indicator
- 4Alert Off Button
- 5Drive status indicator
- 6Drive tray
- 7Rail Kit Release Tab
- 8PSU fan
- 9Power Port
- 10PSU indicator
- 11Console port
- 12PCIe expansion slot
- 131GbE RJ-45 port
- 14USB 3.2 Ports
- 15Expansion port
- 16Reset button
Hardware Specifications |
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CPU |
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CPU
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CPU Model | AMD Ryzen V1500B |
CPU Quantity | 1 | |
CPU Core | 4 | |
CPU Architecture | 64-bit | |
CPU Frequency | 2.2 GHz | |
Hardware Encryption Engine | ||
Memory |
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Memory
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System Memory | 4 GB DDR4 ECC UDIMM |
Memory Module Pre-installed | 4 GB (4 GB x 1) | |
Total Memory Slots | 2 | |
Maximum Memory Capacity | 32 GB (16 GB x 2) | |
Notes |
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Storage |
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Storage
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Drive Bays | 16 |
Maximum Drive Bays with Expansion Unit | 28 (RX1217 x 1) | |
Drive Type (See all supported drives) |
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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 |
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External Ports
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RJ-45 1GbE LAN Port | 4 |
USB 3.2 Gen 1 Port* | 2 | |
Expansion Port | 1 | |
Expansion Port Type | Infiniband | |
PCIe |
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PCIe
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PCIe Expansion | 1 x Gen3 x8 slot (x4 link) |
Appearance |
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Appearance
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Form Factor (RU) | 3U |
Size (Height x Width x Depth) | 132.3 mm x 482 mm x 656.5 mm | |
Weight | 17.1 kg | |
Rack Installation Support* | 4-post 19" rack (Synology Rail Kit - RKS-02) | |
Notes | The rail kit is sold separately | |
Others |
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Others
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System Fan | 80 mm x 80 mm x 3 pcs |
Fan Speed Mode |
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Easy Replacement System Fan | ||
Power Recovery | ||
Noise Level* | 53.5 dB(A) | |
Scheduled Power On / Off | ||
Wake on LAN / WAN | ||
Power Supply Unit / Adapter | 550 watts | |
Redundant Power Supply | ||
AC Input Power Voltage | 100 V to 240 V AC | |
Power Frequency | 50/60 Hz, Single Phase | |
Power Consumption |
97.54 watts (Access) 49.57 watts (HDD Hibernation) |
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British Thermal Unit |
332.61 BTU/hr (Access) 169.03 BTU/hr (HDD Hibernation) |
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Notes |
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Temperature |
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Temperature
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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 | |
Certification |
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Certification
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Warranty |
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Warranty
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3-year hardware warranty, extendable to 5 years with Extended Warranty Plus | |
Notes |
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Environment |
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Environment
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RoHS Compliant | |
Packaging Content |
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Packaging Content
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Optional Accessories |
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Optional Accessories
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Notes | All memory modules will operate at the maximum frequency specified by the CPU manufacturer. |