SSD cache
Boost read/write IOPS over HDD-only arrays by 16X or more with NVMe or SATA SSD Cache4
A powerful storage solution for businesses and IT enthusiasts with redundancy and service continuity features.
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 read1, 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.
AMD Ryzen™ V1500B quad-core 2.2 GHz
2,300 MB/s seq. read 100K 4K random read IOPS1
4 GB ECC DDR4 Up to 32 GB
30cm depth (38cm for RP model)
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.2
Reduce the chance that power disruptions on a single distribution channel or PDU causes data and service availability degradation.
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.Learn more
ECC memory and the Btrfs file system bring higher reliability and snapshot capabilities to help prevent data corruption and simplify data protection.Learn more
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.1
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.Learn more
Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.
Seamless transition between clustered servers in the event of a server failure to minimize the impact on applications.
Learn moreRun various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.
Learn moreInstantly access your NAS files across multiple devices whenever you want, wherever you are.
Learn moreConveniently manage your fleet of Synology NAS from a centralized console.
Learn moreProtect your home or business with intelligent monitoring and video management tools.
Learn moreSatisfy all team collaboration needs behind the safety of your own private cloud with Synology Office, Calendar, and Chat.
Learn moreNotes:
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 Architecture | 64-bit | |
CPU Frequency | 4-core 2.2 GHz | |
Hardware Encryption Engine (AES-NI) | ||
Memory |
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Memory
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System Memory | 4 GB DDR4 ECC SODIMM |
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 | 8 |
Maximum Drive Bays with Expansion Unit | 12 (RX418 x 1) | |
Compatible Drive Type* (See all supported drives) |
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Hot Swappable Drive* | ||
Notes | "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay. | |
External Ports |
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External Ports
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RJ-45 1GbE LAN Port | 4 (with Link Aggregation / Failover support) |
USB 3.2 Gen 1 Port* | 2 | |
eSATA Port | 1 | |
Notes | The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019. | |
PCIe |
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PCIe
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PCIe Expansion | 1 x Gen3 x8 slot (x4 link) |
File System |
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File System
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Internal Drives |
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External Drives |
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Notes | exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center. | |
Appearance |
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Appearance
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Form Factor (RU) | 2U |
Size (Height x Width x Depth) |
RS1221+ : 88 mm x 482 mm x 306.6 mm RS1221RP+ : 88 mm x 482 mm x 407.5 mm |
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Weight |
RS1221+ : 6.9 kg RS1221RP+ : 11.7 kg |
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Rack Installation Support* |
RS1221+ : RS1221RP+ : 4-post 19" rack (Synology Rail Kit - RKS-02) |
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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 2 pcs |
Fan Speed Mode |
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Power Recovery | ||
Noise Level* |
RS1221+ : 25.2 dB(A) RS1221RP+ : 40 dB(A) |
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Scheduled Power On / Off | ||
Wake on LAN / WAN | ||
Power Supply Unit / Adapter |
RS1221+ : 250 W RS1221RP+ : 350 W |
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Redundant Power Supply |
RS1221+ : - RS1221RP+ : |
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AC Input Power Voltage | 100 V to 240 V AC | |
Power Frequency | 50/60 Hz, Single Phase | |
Power Consumption |
RS1221+ : 49.89 W (Access) 22.64 W (HDD Hibernation) RS1221RP+ : 61.94 W (Access) 29.98 W (HDD Hibernation) |
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British Thermal Unit |
RS1221+ : 170.23 BTU/hr (Access) 77.25 BTU/hr (HDD Hibernation) RS1221RP+ : 211.35 BTU/hr (Access) 102.30 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 EW202 or Extended Warranty Plus | |
Notes | The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) | |
Environment |
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Environment
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RoHS Compliant | |
Packaging Content |
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Packaging Content
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RS1221+ :
RS1221RP+ :
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Optional Accessories |
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Optional Accessories
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RS1221+ :
RS1221RP+ :
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Notes |
RS1221+ :
RS1221RP+ :
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DSM Specifications |
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Maximum Single Volume Size | 108 TB | |
Maximum Internal Volume Number | 64 | |
SSD Read / Write Cache (White Paper) | ||
SSD TRIM | ||
Supported RAID Type |
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RAID Migration |
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Volume Expansion with Larger HDDs |
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Volume Expansion by Adding a HDD |
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Global Hot Spare Supported RAID Type |
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Notes |
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File Protocol | SMB/AFP/NFS/FTP/WebDAV | |
Maximum Concurrent SMB/AFP/FTP Connections | 1,000 | |
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) | 2,000 | |
Windows Access Control List (ACL) Integration | ||
NFS Kerberos Authentication | ||
Notes |
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Maximum Local User Accounts | 2,048 | |
Maximum Local Groups | 256 | |
Maximum Shared Folder | 512 | |
Maximum Shared Folder Sync Tasks | 16 | |
Maximum Hybrid Share Folders | 10 | |
Folder and Package Backup | ||
Entire System Backup | ||
Notes | Full-system backup requires DSM 7.2 or later. | |
Synology High Availability | ||
Syslog Events per Second | 1,000 | |
Virtualization |
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Virtualization
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VMware ESXi 6.5 and VAAI | |
Windows Server 2016 | ||
Windows Server 2019 | ||
Windows Server 2022 | ||
Citrix Ready | ||
OpenStack | ||
Networking Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
Supported Browsers |
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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 | |
Notes | For an updated list of supported browser versions, check the DSM Technical Specifications. | |
Add-on Packages view the complete package list |
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Antivirus by McAfee (Trial) |
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Antivirus by McAfee (Trial)
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Suggested Maximum Users | 1,500 | |
Suggested Concurrent Users | 150 | |
Notes | When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections. | |
Document Viewer |
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Document Viewer
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Download Station |
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Download Station
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Maximum Concurrent Download Tasks | 80 | |
Maximum iSCSI Target Number | 128 | |
Maximum LUN | 256 | |
LUN Clone/Snapshot, Windows ODX | ||
Notes | iSCSI Manager has been renamed to SAN Manager in DSM 7.0. | |
Free Email Accounts | 5 (Additional accounts require purchase of licenses) | |
Suggested Maximum Users | 750 | |
Suggested Concurrent Users | 150 | |
Maximum Server Performance | 1,484,000 emails per day, approx. 45GB | |
Notes |
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DLNA Compliance | ||
Facial Recognition | ||
Object Recognition | ||
Maximum Snapshots per Shared Folder | 1,024 | |
Maximum of System Snapshots | 65,536 | |
Default Licenses | 2 (Additional cameras require purchase of licenses) | |
Maximum IP Cameras and Total FPS (H.264) |
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Maximum IP Cameras and Total FPS (H.265) |
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Notes |
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Recommended Number of Concurrent Sync Clients | 550 (the number of connections that can be maintained when the recommended number of hosted files was reached) | |
Recommended Number of Hosted Files | 50,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) | |
Notes |
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Suggested Maximum Users | 4,500 | |
Suggested Concurrent Users | 1,800 | |
Notes |
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Recommended Virtual Machine Instances | 8 (Learn more) | |
Recommended Virtual DSM Number (Licenses required) | 8 (including 1 Free License) | |
Notes | The specifications vary depending on system configuration and memory size. | |
Maximum Connections | 40 |