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Compact and reliable
The RS1221+/RS1221RP+. at only 30 to 38 centimeters deep. is built for space-sensitive deployments. Boasting over 100K 4K random read IOPS and 2.315 MB/s sequential read. the RS1221+/RS1221RP+ is equipped to handle heavy workloads in data-intensive environments. The RS1221RP+ additionally features an extra level of protection with redundant power supplies.

A compact design for space efficiency
The RS1221+ and its RX418 expansion units are designed to help you save space in compact deployments. At only 30 centimeters. half the length of a typical 2U unit. it fits perfectly snug onto 2-post or shallow rackmount enclosures. The RS1221RP+ with dual power supplies comes in at 38 cm. also fitting most shallow depth enclosures.
- Fits into shallow rackmount enclosures
- Easy-to-install on 2-post racks

Built for reliability
Redundant power
Reduce the chance that power disruptions on a single distribution channel or PDU causes data and service availability degradation.

Maximize service availability
When paired with another identical unit. Synology High Availability enables automatic minute-level failover between two clustered servers in the event of a server failure to minimize service downtime.

Data integrity and protection
ECC memory and the Btrfs file system bring higher reliability and snapshot capabilities to help prevent data corruption and simplify data protection.

High performance storage for anything
Up to 2.315/1.147 MB/s sequential read and write throughput and over 100K/54K random read/write IOPS ensures ample performance for demanding workloads.

With room to grow with you
Easily upgrade the RS1221+/RS1221RP+ to match your usage environment. whether it’s for performance. faster networking. or higher storage capacity.
SSD cache
Boost read/write IOPS over HDD-only arrays by 16X or more with NVMe or SATA SSD Cache
10GbE ready
Improve I/O with faster SFP+ or RJ-45 networking
Storage expansion
Expand to 12 drive bays with a RX418 expansion unit

Data protection solutions. built-in

Hyper Backup
A comprehensive backup and recovery solution for added data protection. Create backup destinations locally. on another Synology device. rsync servers. or cloud-based destinations. such as Google Drive. Dropbox. S3-compatible destinations. and Synology C2 Storage. a dedicated backup destination for Synology devices. Deduplication. integrity checks. and incremental transfer technology reduce bandwidth and storage use.

Snapshot Replication
Easily schedule flexible point-in-time backups of shared folders and LUNs with an RPO as low as 5 minutes and recovery in seconds. Set up replication and failover to other Synology storage systems for fast RTOs and minimal service disruption.

Protect your entire office with Active Backup
The Active Backup suite enables administrators to easily secure their entire IT infrastructure by backing up mission-critical data to their NAS. including Windows & Linux workstations and servers. file servers. VMware and Hyper-V virtual machines. and Microsoft 365 and Google Workspace accounts. Benefit from deduplication. multiversioning to quickly jump back in time. and additional data efficiency optimizations for reduced bandwidth and storage use.

Fully certified storage virtualization solutions
Synology iSCSI storage fully supports mainstream virtualization solutions to enhance work efficiency with an easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations. Windows Offloaded Data Transfer (ODX) speeds up data transfer. OpenStack Cinder support turns your Synology NAS into a block-based storage component. Additionally Synology Storage Console enables even more simplified storage provisioning and management options in VMware and Windows environments.

Works best with Synology drives
Engineered to handle intensive 24/7 workloads. Synology drives consistently deliver top-grade performance.

Powered by Synology DiskStation Manager

Synology High Availability
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Virtual Machine Manager
Run various operating systems in isolated sandboxes. Seamlessly clone. store. and migrate virtual machines.
Synology Drive
Instantly access your NAS files across multiple devices whenever you want. wherever you are.
Central Management System
Conveniently manage your fleet of Synology NAS from a centralized console.
Surveillance Station
Complete surveillance solution for recording. monitoring. and management.
Collaboration Suite
Satisfy all team collaboration needs behind the safety of your own private cloud with Synology Office. Calendar. and Chat.

Storage
Storage drive capacity: 0 GB
Supported storage drive interfaces: Serial ATA II. Serial ATA III
Storage drive sizes supported: 2.5.3.5"
Feature: RAID support
RAID levels: 0. 1. 5. 6. 10. JBOD
Feature: Online RAID migration
Feature: Online RAID expansion
Feature: Hot-swap drive bays
Supported file systems: BTRFS. Fat. HFS+. NTFS. exFAT. ext3. ext4
Total installed storage capacity: 0 TB
Number of storage drives supported: 8
Supported storage drive types: HDD & SSD
Processor
Processor manufacturer: AMD
Processor generation: AMD Ryzen Embedded V1000 Series
Processor family: Ryzen Embedded
Processor model: V1500B
Processor frequency: 2.2 GHz
Processor cores: 4
On-board graphics card model: Not available
Memory
Internal memory: 4 GB
Internal memory type: DDR4
Maximum RAM supported: 32 GB
Memory slots: 2
Memory form factor: SO-DIMM
Feature: ECC
Network
Feature: Ethernet LAN
Ethernet LAN data rates: 1000 Mbit/s
Feature: iSCSI support
Feature: Wake-on-LAN ready
Supported network protocols: SMB. AFP. NFS. FTP. WebDAV. CalDAV. iSCSI. Telnet. SSH. SNMP. VPN
Feature: Link aggregation
Feature: Load balancing system
Ports & interfaces
Feature: USB port
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity: 2
eSATA ports quantity: 1
Ethernet LAN (RJ-45) ports: 4
PCI Express x8 (Gen 3.x) slots: 1
Design
Chassis type: Rack (2U)
Cooling type: Active
Product colour: Black
Number of fans: 2 fan(s)
Fan diameter: 8 cm
Feature: Drive bay locking
LED indicators: HDD. Power. Status
Performance
Type: NAS
Device class: Small & Medium Business
Feature: Backup function
Backup features: Cloud. iSCSI LUN
Feature: Multilingual support
Noise level: 40 dB
Feature: Snapshot
Management protocols: SNMP
Feature: Web-based management
Security algorithms: HTTPS. SSH. SSL/TLS
Feature: Access Control List (ACL)
Feature: Reset button
Feature: On/off switch
Feature: Built-in FTP server
Browser supported: Safari. Chrome. Edge. Internet Explorer. Firefox
Feature: System log
Feature: Hot spare
Share folder: AFP. CIFS/SMB. FTP. WebDAV
Software
Operating system installed: DiskStation Manager
Feature: Windows operating systems supported
Feature: Mac operating systems supported
Power
Power supply location: Built-in
Power supply unit (PSU) capacity: 350 W
Feature: Redundant power supply (RPS) support
Power consumption (typical): 61.94 W
Power consumption (HDD standby): 29.98 W
AC input voltage: 100 - 240 V
AC input frequency: 50 - 60 Hz
Weight & dimensions
Width: 482 mm
Depth: 407.5 mm
Height: 88 mm
Weight: 11.7 kg
Packaging content
Cables included: AC
Power cables quantity: 2
Sustainability
Feature: Sustainability compliance
Operational conditions
Operating temperature (T-T): 0 - 35 °C
Operating relative humidity (H-H): 5 - 95%
Storage temperature (T-T): -20 - 60 °C
Operating altitude: 0 - 5000 m
Logistics data
Harmonized System (HS) code: 84714100
Other features
Compliance certificates: CE. RoHS