Refurbished RackStation RS820RP+/RS820+

Ideal 1U rackmount NAS for high-performance data management

Synology Certified Refurbished

Access Synology solutions in a cost-effective and environmentally responsible way. All certified refurbished products are put through extensive testing, comply with stringent quality standards, and come with a 2-year warranty.

More about Synology Certified Refurbished

High-performance storage solution with on-demand scalability

The compact 1U 4-bay Synology RackStation RS820RP+/RS820+ with its storage and connectivity expandability coupled with the powerful Synology DiskStation Manager (DSM) operating system is an ideal edge storage solution for branch offices and small and medium-sized businesses.

Download Datasheet

Performance

1621/599 MB/s sequential read/write throughput

Scalability

Scale up to 8 drives with Synology Expansion Unit RX418

Connectivity

Built-in 4 x 1GbE ports with 10 GbE expansion option

Memory

Up to 18 GB DDR4 ECC

Built for reliability

RS820RP+/RS820+ comes with four Gigabit RJ-45 ports which can be bonded with Link Aggregation to enable automatic network failover and load balancing.

Two RS820RP+/RS820+ units can be paired using Synology High Availability to form a reliable active/passive server cluster, maximizing service uptime.

Furthermore, the RS820RP+ features a redundant power supply for an extra edge in service continuity.

Room for expansion

Easily adjust the RS820RP+/RS820+ to match your usage environment, whether it needs performance, faster networking, or higher storage capacity.

Storage expansion

Expand to 8 drive bays with one RX418 expansion unit.

SSD cache

Boost read/write IOPS over HDD-only arrays by 16 times or more with NVMe or SATA SSD Cache.

10GbE ready

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

All-in-one data management platform

The RS820RP+/RS820+ is designed to support small deployments in tackling common applications such as file management, data backup, and surveillance.

Edge storage for distributed teams

Multi-endpoint data protection

Smart surveillance for small deployments

Edge storage for distributed teams

Provide secure and convenient multi-platform file access, sharing, and synchronization across different locations.

Private file cloud

Enable effective collaboration with Synology Drive

Synology Drive provides remote data access, synchronization, on-demand file restoration, and backup via handy desktop and mobile applications.Learn more

Multi-platform support

Access personal and shared data from mobile app, desktop client, web browser, or another Synology system: Any changes you make are automatically synced to other devices as soon as they are connected.

Collaborate in real time

Integrate with Synology Office to enable concurrent editing on documents, spreadsheets, and slides, with support for conversion to and from Microsoft Word, Excel, PowerPoint, and OpenDocument files.Learn more

Efficient multi-site synchronization

Connect teams with Hybrid Share

Utilize Hybrid Share to store large sets of data in the cloud, leveraging the powerful bandwidth of our data centers to stream requested files to local NAS deployed at the branch offices.

Learn more

Data on demand

With Hybrid Share-enabled folders, remote teams retain full access to the most up-to-date files while benefiting from reduced local storage footprint and bandwidth usage.

Cache data used locally

Frequently accessed files are kept on the local NAS, allowing users to access them at LAN speeds. Files and folders can also be pinned manually to prevent them from being replaced when the cache is full.

Multi-endpoint data protection

Design an effective backup strategy to maximize system availability with a host of native and license-free solutions.

Consolidated backup server

Endpoint, VM, and NAS/SAN protection

Securely back up Windows and Linux endpoints, Synology servers, and VMware^® and Hyper-V^® virtual machines with Active Backup for Business.Learn more

Microsoft 365 and Google Workspace

Centralize backups of Microsoft 365 and Google Workspace data to protect it from accidents and simplify compliance with data retention policies. Schedulable backups, flexible file versioning, and block-level deduplication ensure flexibility and savings in terms of storage and bandwidth consumption.Learn more

Data protection and recovery

Hyper Backup

Back up files, LUNs, installed applications, and system configurations to destinations including Synology C2 Storage, public cloud platforms, USB devices, file servers, local folders, or other Synology systems.
Set and forget backup tasks with regular schedules, enhance security with fine-grained user permissions and encryption, keep backup sizes small with built-in deduplication, and restore data flexibly with multi-versioning.Learn more

Snapshot Replication

Snapshot Replication enables configurable point-in-time snapshots of shared folders and VM storage with an RPO as low as 5 minutes and recovery within seconds.Learn more

Smart surveillance for small deployments

Leverage flexible deployment options, intuitive management capabilities, and advanced video analytics to secure your premises.

Simple-to-deploy local surveillance

Wide compatibility

Connect up to 40 IP cameras from a selection of over 8,600 validated models thanks to Synology Surveillance Station's wide camera compatibility.

Multi-platform convenience

Monitor live streams or watch recordings from web browser, desktop client, or the DS cam mobile app.

Secure and private

Footage is stored locally for easier compliance with data protection regulations and further protected from unauthorized access with industry-standard AES-256 encryption.

Flexible monitoring of multiple locations

Assisted mass deployment

Automatically locate new cameras within a set IP range, and configure units in batch by importing spreadsheets or replicating settings to new cameras.

Centralized management and monitoring

Stay on top of your deployment by previewing triggered events directly on multi-floor or multi-location maps, with online map integration for Google Maps and OpenStreetMap.

Video analytics

Take advantage of intelligent monitoring features such as motion detection, no idle zone, foreign object detection, and anomaly detection to cater the most common surveillance scenarios.

Works best with Synology drives

Enjoy high sustained performance and reliability with enterprise-grade drives designed for Synology NAS and featuring built-in data protection.

HDD

Enterprise Series 3.5" SATA

Plus Series 3.5" SATA

SSD

Enterprise Series 2.5" SATA

Enterprise Series M.2 NVMe

Hardware Overview

RS820RP+

RS820+

1Power indicator
2Power button
3Alert indicator
4Drive status indicator

5Beep off button
6Status indicator
7Drive tray
8Power port

9System fan
10Console port
11PCI Express Expansion Slot
121GbE RJ-45 port

13Reset button
14USB 3.0 port
15eSATA port
16Redundant Power LEDs

1Power indicator
2Power button
3Alert indicator
4Drive status indicator

5Beep off button
6Status indicator
7Drive tray
8Power port

9System fan
10Console port
11PCI Express Expansion Slot
121GbE RJ-45 port

13Reset button
14USB 3.0 port
15eSATA port

More ways to harness your NAS

Data intelligence at the edge

Rely on Synology's fast and secure edge storage solutions to ensure simple data accessibility where it is most needed.

Learn more

Complete endpoint protection

Follow the 3-2-1 backup strategy to keep your data safe with Synology’s backup packages.

Learn more

Ransomware prevention and protection

Minimize the threat posed by increasingly sophisticated ransomware and other malware with Synology solutions.

Learn more

Notes:RS820RP+/RS820+ supports up to 8 drives with the addition of a Synology RX418 expansion unit, sold separately.For the most up-to-date list of compatible NICs, please check our compatibility list.SSD cache can be enabled using SNV3400/SNV3500 NVMe SSDs along with an M2D20 or E10M20-T1 adapter card, or by using a compatible 2.5" SATA SSD. All devices sold separately.C2 Storage for Hyper Backup and Hybrid Share requires purchase of an eligible annual or monthly subscription. A free trial is available for each newly registered device.Surveillance Station includes 2 free licenses. Connecting more cameras and devices requires additional licenses. Learn more Check the compatibility list for supported drives.Extended Warranty Plus must be purchased within 90 days of the device purchase date or, if none is available, 180 days of the device manufacturing date. A Synology Account is required for purchase. The starting date of Extended Warranty Plus additional coverage is calculated based on the purchase date of your Synology NAS. If you cannot provide proof of purchase, the device manufacturing date applies.Express shipping is a paid add-on available in select countries only.

Hardware Specs

Hardware Specifications	Refurbished RS820RP+	Refurbished RS820+
CPU
CPU Model	Intel Atom C3538	Intel Atom C3538
CPU Quantity	1	1
CPU Core	4	4
CPU Architecture	64-bit	64-bit
CPU Frequency	2.1 GHz	2.1 GHz
Hardware Encryption Engine
Memory
System Memory	2 GB DDR4 non-ECC	2 GB DDR4 non-ECC
Total Memory Slots	1	1
Maximum Memory Capacity	18 GB (2GB + 16 GB)	18 GB (2GB + 16 GB)
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.	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.
Storage
Drive Bays	4	4
Maximum Drive Bays with Expansion Unit	8 (RX418 x 1)	8 (RX418 x 1)
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*
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 (black, x4 link)	1 x Gen3 x8 slot (black, x4 link)
Appearance
Form Factor (RU)	1U	1U
Size (Height x Width x Depth)	44 mm x 480 mm x 518.6 mm	44 mm x 480 mm x 492.6 mm
Weight	7.96 kg	6.4 kg
Rack Installation Support*	4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)	4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)
Notes	The rail kit is sold separately	The rail kit is sold separately
Others
System Fan	40 mm x 40 mm x 2 pcs	40 mm x 40 mm x 3 pcs
Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode	Full-Speed Mode Cool Mode Quiet Mode
Power Recovery
Noise Level*	39.9 dB(A)	27 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter	150 watts	150 watts
Redundant Power Supply		-
AC Input Power Voltage	100V to 240V AC	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase	50/60 Hz, Single Phase
Power Consumption	38.88 watts (Access) 22.17 watts (HDD Hibernation)	37.94 watts (Access) 20.96 watts (HDD Hibernation)
British Thermal Unit	132.58 BTU/hr (Access) 75.60 BTU/hr (HDD Hibernation)	129.38 BTU/hr (Access) 71.47 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 EAC CCC KC BIS VCCI RCM	FCC CE BSMI EAC CCC KC VCCI RCM
Warranty
	2 Years	2 Years
Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
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 Quick Installation Guide X 1
Optional Accessories
	DDR4 non-ECC SODIMM: D4NESO-2666-4G DDR4 ECC SODIMM: 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 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Rail Kit Mounted: RKM114* Surveillance Device License Pack	DDR4 non-ECC SODIMM: D4NESO-2666-4G DDR4 ECC SODIMM: 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 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Rail Kit Mounted: RKM114* Surveillance Device License Pack
Notes	Certain items may not be available in your location. Please contact your local distributors for more information. All memory modules will operate at the maximum frequency specified by the CPU manufacturer. This model does not support the ECC feature, regardless of whether the expansion memory is ECC or non-ECC.	Certain items may not be available in your location. Please contact your local distributors for more information. All memory modules will operate at the maximum frequency specified by the CPU manufacturer. This model does not support the ECC feature, regardless of whether the expansion memory is ECC or non-ECC.

DSM Specifications	Refurbished RS820RP+	Refurbished RS820+
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 (with Expansion Unit)	Synology Hybrid RAID JBOD RAID 5 RAID 6 (with Expansion Unit)
Global Hot Spare Supported RAID Type	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 (with Expansion Unit) RAID 10 (with Expansion Unit)	Synology Hybrid RAID RAID 1 RAID 5 RAID 6 (with Expansion Unit) RAID 10 (with Expansion Unit)
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	500	500
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	8	8
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	800	800
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)
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 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). Models with expandable memory are tested with their maximum supported memory. To estimate the RAM requirement for your NAS, please read this article.	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 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). Models with expandable memory are tested with their maximum supported memory. To estimate the RAM requirement for your NAS, please read this article.
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)	1080p: 40 channels, 800 FPS 3M: 34 channels, 340 FPS 5M: 24 channels, 240 FPS 4K: 12 channels, 120 FPS	1080p: 40 channels, 800 FPS 3M: 34 channels, 340 FPS 5M: 24 channels, 240 FPS 4K: 12 channels, 120 FPS
Suggested Maximum IP Cameras and Total FPS (H.265)	1080p: 40 channels, 1200 FPS 3M: 40 channels, 880 FPS 5M: 40 channels, 480 FPS 4K: 28 channels, 280 FPS	1080p: 40 channels, 1200 FPS 3M: 40 channels, 880 FPS 5M: 40 channels, 480 FPS 4K: 28 channels, 280 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 number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.	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 number of streams that can be viewed simultaneously is twice the suggested maximum number of cameras. For example, if the suggested maximum number of cameras for a model is 10 under H.264, 1080p, the model can support up to 20 streams of the same specification at the same time.
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	1,800	1,800
Notes	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	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	4 (Learn more)	4 (Learn more)
Recommended Virtual DSM Number (Licenses required)	4 (including 1 Free License)	4 (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		Refurbished RS820RP+	Refurbished RS820+
CPU	CPU Model	Intel Atom C3538	Intel Atom C3538
	CPU Quantity	1	1
	CPU Core	4	4
	CPU Architecture	64-bit	64-bit
	CPU Frequency	2.1 GHz	2.1 GHz
	Hardware Encryption Engine
Memory	System Memory	2 GB DDR4 non-ECC	2 GB DDR4 non-ECC
	Total Memory Slots	1	1
	Maximum Memory Capacity	18 GB (2GB + 16 GB)	18 GB (2GB + 16 GB)
	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.
Storage	Drive Bays	4	4
	Maximum Drive Bays with Expansion Unit	8 (RX418 x 1)	8 (RX418 x 1)
	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*
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 (black, x4 link)	1 x Gen3 x8 slot (black, x4 link)
Appearance	Form Factor (RU)	1U	1U
	Size (Height x Width x Depth)	44 mm x 480 mm x 518.6 mm	44 mm x 480 mm x 492.6 mm
	Weight	7.96 kg	6.4 kg
	Rack Installation Support*	4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)	4-post 19" rack (Synology Rail Kit - RKM114/RKS-02)
	Notes	The rail kit is sold separately
Others	System Fan	40 mm x 40 mm x 2 pcs	40 mm x 40 mm x 3 pcs
	Fan Speed Mode	Full-Speed Mode Cool Mode Quiet Mode	Full-Speed Mode Cool Mode Quiet Mode
	Power Recovery
	Noise Level*	39.9 dB(A)	27 dB(A)
	Scheduled Power On / Off
	Wake on LAN / WAN
	Power Supply Unit / Adapter	150 watts	150 watts
	Redundant Power Supply		-
	AC Input Power Voltage	100V to 240V AC	100V to 240V AC
	Power Frequency	50/60 Hz, Single Phase	50/60 Hz, Single Phase
	Power Consumption	38.88 watts (Access) 22.17 watts (HDD Hibernation)	37.94 watts (Access) 20.96 watts (HDD Hibernation)
	British Thermal Unit	132.58 BTU/hr (Access) 75.60 BTU/hr (HDD Hibernation)	129.38 BTU/hr (Access) 71.47 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 EAC CCC KC BIS VCCI RCM	FCC CE BSMI EAC CCC KC VCCI RCM
Warranty		2 Years	2 Years
Warranty	Notes	The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
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 Quick Installation Guide X 1
Optional Accessories		DDR4 non-ECC SODIMM: D4NESO-2666-4G DDR4 ECC SODIMM: 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 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Rail Kit Mounted: RKM114* Surveillance Device License Pack	DDR4 non-ECC SODIMM: D4NESO-2666-4G DDR4 ECC SODIMM: 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 10GbE Network Interface Card: E10G21-F2/E10G30-T2/E10G18-T1 Rail Kit Sliding: RKS-02 Rail Kit Mounted: RKM114* Surveillance Device License Pack
Optional Accessories	Notes	Certain items may not be available in your location. Please contact your local distributors for more information. All memory modules will operate at the maximum frequency specified by the CPU manufacturer. This model does not support the ECC feature, regardless of whether the expansion memory is ECC or non-ECC.