Synology RackStation RS2821RP+ 16-Bay NAS Enclosure
Versatile and scalable storage
Synology RS2821RP+ is a 3U 16-bay storage server designed to accommodate a diverse set of business requirements. Scalable to 28 drives, the unit provides powerful backup and restoration functionality for the SMB sector. It delivers 2,200 MB/s sequential read and 105K 4K random read performance, and can be upgraded with SSD cache and 10/25Gb Ethernet options.
Compute
AMD Ryzen™ V1500B quad-core 2.2 GHz
Throughput
2,220 MB/s seq. read 105K 4K random read performance1
Memory
4 GB ECC DDR4, up to 32 GB
Scalability
Up to 28 drive bays with RX1217(RP)
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.
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..
License-free backup solutions
Back up your NAS to other devices
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 deduplication4, and restore data flexibly with multi-versioning. Learn more
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.
- Power button and indicator
- Status Indicator
- Alert Indicator
- Alert Off Button
- Drive status indicator
- Drive tray
- Rail Kit Release Tab
- PSU fan
- Power Port
- PSU indicator
- Console port
- PCIe expansion slot
- 1GbE RJ-45 port
- USB 3.2 Ports
- Expansion port
- Reset button
Hardware Specifications
| Specification | Details |
|---|---|
| CPU | AMD Ryzen V1500B, quad-core 2.2 GHz (64-bit) with AES-NI hardware encryption |
| System Memory | 4 GB DDR4 ECC UDIMM (1×4 GB), 2 slots, expandable to 32 GB (2×16 GB) |
| Drive Bays | 16 × hot-swappable 3.5″/2.5″ SATA HDD/SSD |
| Maximum Expansion | Up to 28 bays via 1× RX1217/RX1217RP expansion unit |
| LAN Interfaces | 4 × 1 GbE RJ-45 (Link Aggregation & failover) |
| USB Ports | 2 × USB 3.2 Gen 1 Type-A |
| PCIe Expansion | 1 × PCIe Gen 3 ×8 (x4 link) slot for 10/25 GbE NIC or NVMe cache adapter |
| File System (Internal) | Btrfs, EXT4 |
| File System (External) | Btrfs, EXT4, EXT3, FAT, NTFS, HFS+, exFAT (via optional Access package) |
| Form Factor | 3U rackmount; 132.3 × 482 × 656.5 mm (H×W×D) |
| Weight | 17.1 kg |
| Rack Compatibility | 4-post 19″ rail kit (RKS-02) – sold separately |
| Cooling | 3 × 80 × 80 mm hot-swappable system fans (multiple speed modes) |
| Power Supply | 550 W AC input (100–240 V, 50/60 Hz), redundant PSUs supported |
| Power Consumption | 97.54 W (active), 49.57 W (HDD hibernation) |
| Noise Level | 53.5 dB(A) |
| Operating Temperature | 0 °C to 35 °C (32 °F to 95 °F) |
| Certification | FCC, CE, BSMI, EAC, CCC, KC, UL, VCCI, RCM |
| Warranty | 3-year hardware warranty (extendable to 5 years with Extended Warranty Plus) |
Key Software & Features
- DiskStation Manager (DSM)
Unified, browser-based OS with a rich ecosystem for file sharing, backup, virtualization, surveillance, and collaboration. - Btrfs Next-Generation File System
Metadata mirroring, inline compression, checksums, self-healing, and near-instant snapshots protect data integrity. - High Availability (SHA)
Pair two RS2818RP+ units in an active/passive cluster for sub-minute failover and uninterrupted service. - Active Backup Suite
Agentless, incremental backup for Windows/Linux servers, VMs, and SaaS apps with deduplication and centralized monitoring. - Hybrid Cloud & Cloud Sync
Two-way sync with Google Drive, Dropbox, OneDrive, and Synology C2; on-premises caching of hot data. - Virtual Machine Manager
Host and isolate VMs or containers directly on the NAS for dev/test workloads. - Surveillance Station
Manage up to 50 IP cameras (2 free licenses) with live view, recording, playback, and intelligent event detection.
Performance & Scalability
With four Gigabit LAN ports and optional 10/25 GbE expansion, the RS2818RP+ sustains high sequential throughput and random I/O for multi-user file services, virtualization, and backup tasks. Online scale-out to 28 bays via a single RX1217/RX1217RP unit lets you grow capacity without disruption.
Ideal Use Cases
- Centralized file server for small-to-midsize enterprises requiring dense storage
- Virtualization storage platform with optional high-speed cache and network upgrades
- Hybrid cloud edge node balancing local performance with cloud archiving
- Surveillance NVR supporting up to 50 IP cameras with integrated management
- Backup repository with deduplicated, multi-version protection
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