RackStation RS1221RP+/RS1221+

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Performance Compatibility

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Business advice

RackStation RS1221RP+/RS1221+

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

Features
Specs

Compact and reliable

The RS1221RP+/RS1221+, 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 RS1221RP+/RS1221+ 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 IOPS

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.

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.

4KB Random IOPS Sequential Throughput

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With room to grow with you

Easily upgrade the RS1221RP+/RS1221+ 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

With room to grow with you

Easily upgrade the RS1221RP+/RS1221+ 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

Maximize data availability
Protect your entire IT infrastructure

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

Works best with Synology drives

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

Enterprise Series 3.5" SATA Plus Series 3.5" SATA

Enterprise Series 2.5" SATA Enterprise Series M.2 NVMe

RackStation RS1221RP+/RS1221+

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 Station

Complete surveillance solution for recording, monitoring, and management.

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

We have you covered

RS1221RP+/RS1221+ is backed by Synology’s three-year hardware warranty. An optional two-year extended warranty that extends coverage to five years is available in select regions. Learn more

Hardware Overview

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

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

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. Learn more
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

Hardware Specifications	RS1221RP+	RS1221+
CPU
CPU Model	AMD Ryzen V1500B	AMD Ryzen V1500B
CPU Quantity	1	1
CPU Core	4	4
CPU Architecture	64-bit	64-bit
CPU Frequency	2.2 GHz	2.2 GHz
Hardware Encryption Engine
Memory
System Memory	4 GB DDR4 ECC SODIMM	4 GB DDR4 ECC SODIMM
Memory Module Pre-installed	4 GB (4 GB x 1)	4 GB (4 GB x 1)
Total Memory Slots	2	2
Maximum Memory Capacity	32 GB (16 GB x 2)	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.	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
Drive Bays	8	8
Maximum Drive Bays with Expansion Unit	12 (RX418 x 1)	12 (RX418 x 1)
Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD	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.	"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
RJ-45 1GbE LAN Port	4	4
USB 3.2 Gen 1 Port*	2	2
Expansion Port	1	1
Expansion Port Type	eSATA	eSATA
Notes	The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.	The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
PCIe
PCIe Expansion	1 x Gen3 x8 slot (x4 link)	1 x Gen3 x8 slot (x4 link)
Appearance
Form Factor (RU)	2U	2U
Size (Height x Width x Depth)	88 mm x 482 mm x 407.5 mm	88 mm x 482 mm x 306.6 mm
Weight	8.4 kg	6.9 kg
Rack Installation Support*	4-post 19" rack (Synology Rail Kit - RKS-02)	4-post 19" rack (Synology Rail Kit - RKM114/RKS-02) 2-post 19" rack (direct mounting)
Notes	The rail kit is sold separately	The rail kit is sold separately
Others
System Fan	80 mm x 80 mm x 2 pcs	80 mm x 80 mm x 2 pcs
Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode	Full-Speed Mode Cool Mode Quiet Mode
Power Recovery
Noise Level*	53.5 dB(A)	37.8 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter	350 watts	250 watts
Redundant Power Supply		-
AC Input Power Voltage	100 V to 240 V AC	100 V to 240 V AC
Power Frequency	50/60 Hz, Single Phase	50/60 Hz, Single Phase
Power Consumption	61.94 watts (Access) 29.98 watts (HDD Hibernation)	49.89 watts (Access) 22.64 watts (HDD Hibernation)
British Thermal Unit	211.35 BTU/hr (Access) 102.30 BTU/hr (HDD Hibernation)	170.23 BTU/hr (Access) 77.25 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%	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
Operating Temperature	0°C to 35°C (32°F to 95°F)	0°C to 35°C (32°F to 95°F)
Storage Temperature	-20°C to 60°C (-5°F to 140°F)	-20°C to 60°C (-5°F to 140°F)
Relative Humidity	5% to 95% RH	5% to 95% RH
Certification
	FCC CE BSMI VCCI RCM EAC CCC KC UL	FCC CE BSMI VCCI RCM EAC CCC KC UL
Warranty
	3-year hardware warranty, extendable to 5 years with EW202 or Extended Warranty Plus	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) Extended Warranty Plus is only available in Europe and North America. EW201/EW202 is only available in Asia, Africa, and Oceania. For exact availability information please visit their respective websites.	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. EW201/EW202 is only available in Asia, Africa, and Oceania. For exact availability information please visit their respective websites.
Environment
	RoHS Compliant	RoHS Compliant
Packaging Content
	Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1	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
Optional Accessories
	DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G Expansion Units: RX418 Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02	DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G Expansion Units: RX418 Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Rail Kit Mounted: RKM114*
Notes	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.	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.

DSM Specifications	RS1221RP+	RS1221+
Storage Management
Maximum Single Volume Size	108 TB	108 TB
Maximum Internal Volume Number	64	64
SSD Read/Write Cache (Determining cache size)
SSD TRIM
Supported RAID Type	Synology Hybrid RAID Basic JBOD RAID 0 RAID 1 RAID 5 RAID 6 RAID 10	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	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	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	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	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.	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 System
Internal Drives	Btrfs ext4	Btrfs ext4
External Drives	Btrfs ext4 ext3 FAT NTFS HFS+ exFAT	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.	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.
File Services
File Protocol	SMB AFP NFS FTP WebDAV Rsync	SMB AFP NFS FTP WebDAV Rsync
Maximum Concurrent SMB/AFP/FTP Connections	1,000	1,000
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion)	2,000	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.	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
Maximum Local User Accounts	2,048	2,048
Maximum Local Groups	256	256
Maximum Shared Folder	512	512
Maximum Shared Folder Sync Tasks	16	16
Hybrid Share
Maximum Hybrid Share Folders	10	10
Hyper Backup
Folder and Package Backup
Entire System Backup
Notes	Full-system backup requires DSM 7.2 or later.	Full-system backup requires DSM 7.2 or later.
High Availability
Synology High Availability
Log Center

Syslog Events per Second	1,000	1,000
Virtualization
VMware ESXi 6.5 and VAAI
Windows Server 2016
Windows Server 2019
Windows Server 2022
Citrix Ready
OpenStack
General Specifications
Supported Protocols	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV	SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers	Chrome Firefox Edge Safari	Chrome Firefox 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	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.	For an updated list of supported browser versions, check the DSM Technical Specifications.
Add-on Packages view the complete package list
Central Management System

Synology Chat

Suggested Users	150	150
Notes	Models with expandable memory are tested with their maximum supported memory.	Models with expandable memory are tested with their maximum supported memory.
Download Station

Maximum Concurrent Download Tasks	80	80
SAN Manager

Maximum iSCSI Target Number	128	128
Maximum LUN	256	256
LUN Clone/Snapshot, Windows ODX
Notes	iSCSI Manager has been renamed to SAN Manager in DSM 7.0.	iSCSI Manager has been renamed to SAN Manager in DSM 7.0.
Synology MailPlus / MailPlus Server

Free Email Accounts	5 (Additional accounts require purchase of licenses)	5 (Additional accounts require purchase of licenses)
Suggested Users	750	750
Maximum Server Performance	1,484,000 emails per day, approx. 45GB	1,484,000 emails per day, approx. 45GB
Notes	Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 20 emails per day). Learn more Models with more than 4 bays were installed with two SSDs for SSD cache. Models with expandable memory are tested with their maximum supported memory. 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).	Suggested users is derived from testing in an environment with 20% heavy users (each with 20,000 pre-populated emails and receiving 240 emails per day) and 80% light users (each receiving an average of 20 emails per day). Learn more Models with more than 4 bays were installed with two SSDs for SSD cache. Models with expandable memory are tested with their maximum supported memory. 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

DLNA Compliance
Synology Photos

Facial Recognition
Object Recognition
Snapshot Replication

Maximum Snapshots per Shared Folder	1,024	1,024
Maximum of System Snapshots	65,536	65,536
Surveillance Station

Default Licenses	2 (Additional cameras require purchase of licenses)	2 (Additional cameras require purchase of licenses)
Suggested Maximum IP Cameras and Total FPS (H.264)	720p: 40 channels, 1200 FPS 1080p: 40 channels, 1050 FPS 3M: 40 channels, 600 FPS 5M: 40 channels, 440 FPS 4K: 32 channels, 320 FPS	720p: 40 channels, 1200 FPS 1080p: 40 channels, 1050 FPS 3M: 40 channels, 600 FPS 5M: 40 channels, 440 FPS 4K: 32 channels, 320 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)	720p: 40 channels, 1200 FPS 1080p: 40 channels, 1200 FPS 3M: 40 channels, 1120 FPS 5M: 40 channels, 600 FPS 4K: 40 channels, 480 FPS	720p: 40 channels, 1200 FPS 1080p: 40 channels, 1200 FPS 3M: 40 channels, 1120 FPS 5M: 40 channels, 600 FPS 4K: 40 channels, 480 FPS
Notes	Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements. The maximum number of camera stream outputs is 2 times the suggested maximum number of IP cameras.	Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads. Use NVR Selector to quickly find a suitable model based on your requirements. The maximum number of camera stream outputs is 2 times the suggested maximum number of IP cameras.
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)	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)	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. Models with expandable memory are tested with their maximum supported memory. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.	Exceeding the recommended numbers above will not block application operations, but may result in longer response time. Utilizing SSD cache can significantly improve performance. Models with expandable memory are tested with their maximum supported memory. Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Synology Office

Suggested Users	4,500	4,500
Notes	Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. Learn more Models with expandable memory are tested with their maximum supported memory. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM	Suggested users is derived from testing in an environment with 60% idle users (each logging in and viewing documents) and 40% active users (each executing random actions at intervals of 20 to 40 seconds) operating within documents, each document having 30 users. Learn more Models with expandable memory are tested with their maximum supported memory. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Virtual Machine Manager

Recommended Virtual Machine Instances	8 (Learn more)	8 (Learn more)
Recommended Virtual DSM Number (Licenses required)	8 (including 1 Free License)	8 (including 1 Free License)
Notes	The specifications vary depending on system configuration and memory size.	The specifications vary depending on system configuration and memory size.
VPN Server

Maximum Connections	40	40

Hardware Specs

Hardware Specifications		RS1221RP+	RS1221+
CPU	CPU Model	AMD Ryzen V1500B	AMD Ryzen V1500B
	CPU Quantity	1	1
	CPU Core	4	4
	CPU Architecture	64-bit	64-bit
	CPU Frequency	2.2 GHz	2.2 GHz
	Hardware Encryption Engine
Memory	System Memory	4 GB DDR4 ECC SODIMM	4 GB DDR4 ECC SODIMM
	Memory Module Pre-installed	4 GB (4 GB x 1)	4 GB (4 GB x 1)
	Total Memory Slots	2	2
	Maximum Memory Capacity	32 GB (16 GB x 2)	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	Drive Bays	8	8
	Maximum Drive Bays with Expansion Unit	12 (RX418 x 1)	12 (RX418 x 1)
	Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD	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	RJ-45 1GbE LAN Port	4	4
	USB 3.2 Gen 1 Port*	2	2
	Expansion Port	1	1
	Expansion Port Type	eSATA	eSATA
	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 Expansion	1 x Gen3 x8 slot (x4 link)	1 x Gen3 x8 slot (x4 link)
Appearance	Form Factor (RU)	2U	2U
	Size (Height x Width x Depth)	88 mm x 482 mm x 407.5 mm	88 mm x 482 mm x 306.6 mm
	Weight	8.4 kg	6.9 kg
	Rack Installation Support*	4-post 19" rack (Synology Rail Kit - RKS-02)	4-post 19" rack (Synology Rail Kit - RKM114/RKS-02) 2-post 19" rack (direct mounting)
	Notes	The rail kit is sold separately
Others	System Fan	80 mm x 80 mm x 2 pcs	80 mm x 80 mm x 2 pcs
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode	Full-Speed Mode Cool Mode Quiet Mode
	Power Recovery
	Noise Level*	53.5 dB(A)	37.8 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	350 watts	250 watts
	Redundant Power Supply		-
	AC Input Power Voltage	100 V to 240 V AC	100 V to 240 V AC
	Power Frequency	50/60 Hz, Single Phase	50/60 Hz, Single Phase
	Power Consumption	61.94 watts (Access) 29.98 watts (HDD Hibernation)	49.89 watts (Access) 22.64 watts (HDD Hibernation)
	British Thermal Unit	211.35 BTU/hr (Access) 102.30 BTU/hr (HDD Hibernation)	170.23 BTU/hr (Access) 77.25 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	Operating Temperature	0°C to 35°C (32°F to 95°F)	0°C to 35°C (32°F to 95°F)
	Storage Temperature	-20°C to 60°C (-5°F to 140°F)	-20°C to 60°C (-5°F to 140°F)
	Relative Humidity	5% to 95% RH	5% to 95% RH
Certification		FCC CE BSMI VCCI RCM EAC CCC KC UL	FCC CE BSMI VCCI RCM EAC CCC KC UL
Warranty		3-year hardware warranty, extendable to 5 years with EW202 or Extended Warranty Plus	3-year hardware warranty, extendable to 5 years with EW202 or Extended Warranty Plus
Warranty	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more) Extended Warranty Plus is only available in Europe and North America. EW201/EW202 is only available in Asia, Africa, and Oceania. For exact availability information please visit their respective websites.
Environment		RoHS Compliant	RoHS Compliant
Packaging Content		Main Unit X 1 Accessory Pack X 1 AC Power Cord X 2 Quick Installation Guide X 1	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
Optional Accessories		DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G Expansion Units: RX418 Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02	DDR4 ECC SODIMM: D4ES01-4G/D4ES01-8G/D4ECSO-2666-16G Expansion Units: RX418 Enterprise Series 3.5" SATA HDD: HAT5300 Series Plus Series 3.5" SATA HDD: HAT3300 Series Enterprise Series 2.5" SATA SSD: SAT5200 Series M.2 SSD & 10GbE Combo Adapter Card: E10M20-T1 M.2 SSD Adapter Card: M2D20/M2D18 25GbE Network Interface Card: E25G30-F2 10GbE Network Interface Card: E10G30-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Rail Kit Mounted: RKM114*
Optional Accessories	Notes	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.	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.