RackStation RS1221+/RS1221RP+

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RackStation RS1221+/RS1221RP+

A powerful storage solution for businesses and IT enthusiasts with redundancy and service continuity features.

Features
Specs

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 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.

Download Datasheet

Compute

AMD Ryzen^™ V1500B quad-core 2.2 GHz

Throughput

2,300 MB/s seq. read 100K 4K random read IOPS¹

Memory

4 GB ECC DDR4 Up to 32 GB

Compact

30cm depth (38cm for RP model)

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.²

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.Learn more

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.Learn more

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.¹

4KB Random IOPS Sequential Throughput

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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.³

SSD cache

Boost read/write IOPS over HDD-only arrays by 16X or more with NVMe or SATA SSD Cache⁴
10GbE ready

Improve I/O with faster SFP+ or RJ-45 networking
Storage expansion

Expand to 12 drive bays with a RX418 expansion unit

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.³

SSD cache

Boost read/write IOPS over HDD-only arrays by 16X or more with NVMe or SATA SSD Cache⁴

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.Learn more

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.Learn more

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.Learn more

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.Learn more

Works best with Synology drives

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

3.5” HDD HAT5300

M.2 SSD SNV3000

2.5” SSD SAT5200

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.

Learn more

Virtual Machine Manager

Run various operating systems in isolated sandboxes. Seamlessly clone, store, and migrate virtual machines.

Learn more

Synology Drive

Instantly access your NAS files across multiple devices whenever you want, wherever you are.

Learn more

Central Management System

Conveniently manage your fleet of Synology NAS from a centralized console.

Learn more

Surveillance

Protect your home or business with intelligent monitoring and video management tools.

Learn more

Collaboration Suite

Satisfy all team collaboration needs behind the safety of your own private cloud with Synology Office, Calendar, and Chat.

Learn more

Extra protection with Extended Warranty Plus

Extend the standard 3-year hardware warranty of your RS1221+ with 2 more years of Synology-certified support and premium services that help you recover faster in the event of disaster.

RackStation RS1221+/RS1221RP+

1 Power indicator
2 Power button
3 Alert Off Button
4 Status indicator

5 Alert indicator
6 Drive status indicator
7 Drive tray
8 System fan

9 PCIe expansion slot
10 Reset button
11 USB 3.2 Gen 1 port
12 1GbE RJ-45 port

13 Expansion port
14 Console port
15 Power port

RackStation RS1221+/RS1221RP+

1 Power indicator
2 Power button
3 Alert Off Button
4 Status indicator

5 Alert indicator
6 Drive status indicator
7 Drive tray
8 System fan

9 PCIe expansion slot
10 Reset button
11 USB 3.2 Gen 1 port
12 1GbE RJ-45 port

13 Expansion port
14 Console port
15 Power port
16 PSU Indicators & Alert Off Buttons

Notes:

Performance testing conducted by Synology with 10GbE NIC installed. Actual results may vary depending on system configuration, testing methods, and other environmental variables. Check the performance page for additional details.
Compared to typical 2U rackmount chassis depth of 24" (61cm) or more. Actual fit will may depend on cabinet design, including usable space, cable routing, weight tolerance, and more. Synology is unable to provide guidance on compatibility with specific rackmount equipment.
Network adapter cards, expansion units, other PCIe add-in-cards, and storage drives are sold separately. Refer to the compatibility list for compatible devices.
NVMe SSD cache can be enabled via a M2D20 or E10M20-T1 PCIe expansion card and 2x Synology SNV3400/3500 M.2 NVMe SSDs. Read/write SATA SSD cache can be enabled via 2x Synology SAT5200 2.5" SATA SSDs.

Hardware Specs
Software Specs

Hardware Specifications
CPU
CPU	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
Memory	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	Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance. Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion. For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.
Storage
Storage	Drive Bays	8
	Maximum Drive Bays with Expansion Unit	12 (RX418 x 1)
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD
	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
External Ports	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
PCIe	PCIe Expansion	1 x Gen3 x8 slot (x4 link)
File System
File System	Internal Drives	Btrfs EXT4
	External Drives	Btrfs EXT4 EXT3 FAT NTFS HFS+ exFAT
	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
Appearance	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
	Weight	RS1221+ : 6.9 kg RS1221RP+ : 11.7 kg
	Rack Installation Support*	RS1221+ : 4-post 19" rack (Synology Rail Kit - RKM114/RKS-02) 2-post 19" rack (direct mounting) RS1221RP+ : 4-post 19" rack (Synology Rail Kit - RKS-02)
	Notes	The rail kit is sold separately
Others
Others	System Fan	80 mm x 80 mm x 2 pcs
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode
	Power Recovery
	Noise Level*	RS1221+ : 25.2 dB(A) RS1221RP+ : 40 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	RS1221+ : 250 W RS1221RP+ : 350 W
	Redundant Power Supply	RS1221+ : - RS1221RP+ :
	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)
	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)
	Notes	Power consumption is measured when it is fully loaded with Western Digital 1TB WD10EFRX hard drive(s). Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
Temperature
Temperature	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
Certification	FCC CE BSMI EAC CCC KC VCCI RCM
Warranty
Warranty	3-year hardware warranty, extendable to 5 years with EW202 or Extended Warranty Plus
	Notes	Availability varies by region. Before purchasing, please visit the official web pages of EW201/202 and Extended Warranty Plus for a list of eligible regions. The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
Environment	RoHS Compliant
Packaging Content
Packaging Content	RS1221+ : Main Unit X 1 Accessory Pack X 1 AC Power Cord X 1 C13 to C14 power cord x 1 Quick Installation Guide X 1 RS1221RP+ : Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1
Optional Accessories
Optional Accessories	RS1221+ : DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G Expansion Units: RX418 3.5" SATA HDD: HAT5300 2.5" SATA SSD: SAT5210 M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G21-F2 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Rail Kit Mounted: RKM114* Surveillance Device License Pack RS1221RP+ : DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G Expansion Units: RX418 3.5" SATA HDD: HAT5300 2.5" SATA SSD: SAT5210 M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G21-F2 10GbE Network Interface Card: E10G21-F2/E10G18-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Surveillance Device License Pack
	Notes	RS1221+ : Certain items may not be available in your location. Please contact your local distributors for more information. Upgrade to DSM 7.2-64551 or later before installing the M2D18. All memory modules will operate at the maximum frequency specified by the CPU manufacturer. RS1221RP+ : Upgrade to DSM 7.2-64551 or later before installing the M2D18. All memory modules will operate at the maximum frequency specified by the CPU manufacturer.

DSM Specifications
Storage Management
Storage Management	Maximum Single Volume Size*	108 TB
	Maximum Internal Volume Number	64
	SSD Read / Write Cache (White Paper)
	SSD TRIM
	Supported RAID Type	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10
	RAID Migration	Basic to RAID 1 Basic to RAID 5 RAID 1 to RAID 5 RAID 5 to RAID 6
	Volume Expansion with Larger HDDs	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
	Volume Expansion by Adding a HDD	Synology Hybrid RAID JBOD RAID 5 RAID 6
	Global Hot Spare Supported RAID Type	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10
	Notes	Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored. Each internal volume (may consist of multiple drives) is expandable up to 108TB.
File Services
File Services	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	Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM. The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Account & Shared Folder
Account & Shared Folder	Maximum Local User Accounts	2,048
	Maximum Local Groups	256
	Maximum Shared Folder	512
	Maximum Shared Folder Sync Tasks	16
Hybrid Share
Hybrid Share	Maximum Hybrid Share Folders	10
Hyper Backup
Hyper Backup	Data & Folder Backup
	Entire System Backup
	Notes	DSM version requirement to support entire system backup: DSM7.2 or later.
High Availability
High Availability	Synology High Availability
Log Center
Log Center
	Syslog Events per Second	1,000
Virtualization
Virtualization	VMware vSphere with VAAI
	Windows Server 2016
	Windows Server 2019
	Citrix Ready
	OpenStack
General Specifications
General Specifications	Networking Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
	Supported Browsers	Google Chrome Firefox Microsoft Edge Safari
	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
Antivirus by McAfee (Trial)
Antivirus by McAfee (Trial)
Central Management System
Central Management System
Synology Chat
Synology Chat
	Maximum Users	1,500
	Maximum Number of Concurrent Users	150
	Notes	When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
Document Viewer
Document Viewer
Download Station
Download Station
	Maximum Concurrent Download Tasks	80
SAN Manager
SAN Manager
	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.
Synology MailPlus / MailPlus Server
Synology MailPlus / MailPlus Server
	Free Email Accounts	5 (Licenses required for additional accounts)
	Maximum Number of Concurrent Users	150
	Maximum Server Performance	1,484,000 emails per day, approx. 45GB
	Notes	Models with more than 4 bays were installed with two SSDs for SSD cache. For tested models with expandable memory, the maximum amount of RAM was installed. The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers. Functions that were enabled in all of the tests above: anti-spam, anti-virus, DNSBL, greylist, content scan, full-text search (English only).
Media Server
Media Server
	DLNA Compliance
Synology Photos
Synology Photos
	Facial Recognition
Snapshot Replication
Snapshot Replication
	Maximum Snapshots per Shared Folder	1,024
	Maximum of System Snapshots	65,536
Surveillance Station
Surveillance Station
	Maximum IP cam (Licenses required)	40 (including 2 Free License) (see all supported IP cameras)
	Total FPS (H.264)	1200 FPS @ 720p (1280x720) 1050 FPS @ 1080p (1920x1080) 600 FPS @ 3M (2048x1536) 440 FPS @ 5M (2591x1944) 320 FPS @ 4K (3840x2160)
	Total FPS (H.265)	1200 FPS @ 720p (1280x720) 1200 FPS @ 1080p (1920x1080) 1120 FPS @ 3M (2048x1536) 600 FPS @ 5M (2591x1944) 480 FPS @ 4K (3840x2160)
	Notes	Maximum IP cameras and FPS figures are tested with the device fully populated with drives and under a continuous recording setup. Actual system capabilities may differ depending on system configuration, drive performance, number of features enabled, and if additional workloads are present.
Synology Drive
Synology Drive
	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	Exceeding the recommended numbers above will not block application operations, but may result in longer response time. Utilizing SSD cache can significantly improve performance. For tested models with expandable memory, the maximum amount of RAM was installed. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office
Synology Office
	Maximum Users	1,800
	Notes	Multiple files were opened for testing and each file was edited by 30 users simultaneously. For tested models with expandable memory, the maximum amount of RAM was installed. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Video Station
Video Station
Virtual Machine Manager
Virtual Machine Manager
	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.
VPN Server
VPN Server
	Maximum Connections	40

Notes:

Model specifications are subject to change without prior notice.
The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time.
The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations.
If usage requirements exceed the specifications above, please contact our regional partners for professional advice.