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Synology Network Attached Storage RS820RP+ 4Bay Rack Mounted (Diskless) Retail
Synology Network Attached Storage RS820RP+ 4Bay Rack Mounted (Diskless) Retail

Synology Network Attached Storage RS820RP+ 4Bay Rack Mounted (Diskless) Retail

$1,383.49
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MPN
RS820RP+
Hardware Specs
CPU
CPU Model
Intel Atom C3538
CPU Architecture
64-bit
CPU Frequency
Quad Core 2.1 GHz
Hardware Encryption Engine (AES-NI)
Yes

Storage
Drive Bays
4
Maximum Drive Bays with Expansion Unit
8
Compatible Drive Type
3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
Maximum Internal Raw Capacity
64 TB (16 TB drive x 4) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units
128 TB (64 TB + 16 TB drive x 4) (Capacity may vary by RAID types)
Maximum Single Volume Size
108 TB
Hot Swappable Drive
Yes
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.
The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit.
Each internal volume (may consist of multiple drives) is expandable up to 108TB.

External Ports
RJ-45 1GbE LAN Port
4 (with Link Aggregation / Failover support)
USB 3.0 Port
2
eSATA Port
1

PCIe
PCIe Expansion
1 x Gen3 x8 slot (black, x4 link)
Add-In-Card Support
PCIe Network Interface Card
M2D18 - Dual M.2 SATA/NVMe SSD adapter card for SSD cache

File System
Internal Drives
Btrfs
EXT4
External Drives
Btrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT
Notes
exFAT Access is purchased separately in Package Center.

Appearance
Form Factor (RU)
1U
Rack Installation Support
4-post 19" rack (Synology Rail Kit - RKM114/RKS1317)
Notes
The rail kit is sold separately

Others
System Fan
40 mm x 40 mm x 3 pcs
40 mm x 40 mm x 2 pcs (for RP model)
Fan Speed Mode
Full-Speed Mode
Cool Mode
Quiet Mode
Power Recovery
Yes
Noise Level
27 dB(A)
39.9 dB(A) (for RP model)
Scheduled Power On / Off
Yes
Wake on LAN / WAN
Yes
Power Supply Unit / Adapter
150 W
Redundant Power Supply
yes (for RP model)
AC Input Power Voltage
100 V to 240 V AC
Power Frequency
50/60 Hz, Single Phase
Power Consumption
37.94 W (Access)
20.96 W (HDD Hibernation)
38.88 W (Access) (for RP model)
22.17 W (HDD Hibernation) (for RP model)
British Thermal Unit
129.54 BTU/hr (Access)
71.57 BTU/hr (HDD Hibernation)
132.75 BTU/hr (Access) (for RP model)
75.70 BTU/hr (HDD Hibernation) (for RP model)
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: 24.25-25.75oC, Humidity: 58.2-61.8%

Temperature
Operating Temperature
0oC to 35oC (32oF to 95oF)
Storage Temperature
-20oC to 60oC (-5oF to 140oF)
Relative Humidity
5% to 95% RH

Certification
EAC
VCCI
CCC
RCM
KC
FCC
CE
BSMI

Environment
RoHS Compliant

Packaging Content
Main Unit X 1
Accessory Pack X 1
AC Power Cord X 1
AC Power Cord X 2 (for RP model)
Quick Installation Guide X 1

Optional Accessories
D4NESO-2666-4G DDR4 non-ECC SO-DIMM
D4ECSO-2666-16G DDR4 ECC SO-DIMM
Surveillance Device License Pack
Expansion Unit: RX418 X 1
Synology Ethernet Adapter E10G17-F2
Synology Ethernet Adapter E10G18-T1
Synology Ethernet Adapter E10G18-T2
Synology M2D18 M.2 SSD adapter card
Synology Rail Kit Mounted - RKM114
Synology Rail Kit Sliding - RKS1317
VS360HD
VS960HD
Notes
This model does not support the ECC feature, regardless of whether the expansion memory is ECC or non-ECC.

Software Specs
DSM Specifications
Storage Management
Maximum Internal Volume Number
64
Maximum iSCSI Target Number
128
Maximum iSCSI LUN
256
iSCSI LUN Clone/Snapshot, Windows ODX
Yes
SSD Read / Write Cache
Yes
SSD TRIM
Yes
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 (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)

File Services
File Protocol
CIFS/AFP/NFS/FTP/WebDAV
Maximum Concurrent CIFS/AFP/FTP Connections
500
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion)
2,000
Windows Access Control List (ACL) Integration
Yes
NFS Kerberos Authentication
Yes

Account and Shared Folder
Maximum Local User Accounts
2,048
Maximum Local Groups
256
Maximum Shared Folder
512
Maximum Shared Folder Sync Tasks
8

High Availability
Synology High Availability
Yes

Log Center
Syslog Events per Second
800

Virtualization
VMware vSphere 6 with VAAI
Yes
Windows Server 2016
Yes
Citrix Ready
Yes
OpenStack
Yes

General Specifications
Networking Protocols
SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
Chrome
Firefox
Edge
Internet Explorer 10 onwards
Safari 10 onwards
Safari (iOS 10 onwards)
Chrome (Android 6.0 onwards)

Add-on Packages
Antivirus by McAfee (Trial)
Yes

Central Management System
Yes

Synology Chat
Maximum Users
1,500
Notes
The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
CPU and RAM usage were both under 80% when the number of maximum users was reached.
For tested models with expandable memory, the maximum amount of RAM was installed.

Document Viewer
Yes

Download Station
Maximum Concurrent Download Tasks
80

exFAT Access (Optional)
Yes

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
The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users.
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
DLNA Compliance
Yes

Moments
Facial Recognition
Yes
Subject Recognition
Yes
Auto Color and Rotate
Yes
Moments Select
Yes

Snapshot Replication
Maximum Snapshots per Shared Folder
1,024
Maximum of System Snapshots
65,536

Surveillance Station
Maximum IP cam
40 (including 2 Free License)
Total FPS (H.264)
1200 FPS at 720p (1280x720)
800 FPS at 1080p (1920x1080)
340 FPS at 3M (2048x1536)
240 FPS at 5M (2591x1944)
120 FPS at 4K (3840x2160)
Total FPS (H.265)
1200 FPS at 720p (1280x720)
1200 FPS at 1080p (1920x1080)
880 FPS at 3M (2048x1536)
480 FPS at 5M (2591x1944)
280 FPS at 4K (3840x2160)
Total FPS (MJPEG)
380 FPS at 720p (1280x720)
250 FPS at 1080p (1920x1080)
190 FPS at 3M (2048x1536)
140 FPS at 5M (2591x1944)
Notes
Surveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.

Synology Drive
Recommended Number of Hosted Files
1,000,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
Recommended Number of Concurrent Sync Clients
550 (the number of connections that can be maintained when the recommended number of hosted files was reached)
Notes
For tested models with expandable memory, the maximum amount of RAM was installed.
Exceeding the limits above may result in longer response time in file operations.
Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.

Synology Office
Maximum Users
1,800
Notes
Multiple files were opened for testing and each file was edited by 30 users simultaneously.
CPU and RAM usage were both under 80% when the number of maximum users was reached.
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 Transcoding
Group 1 - Type 1
Maximum Transcoding Channel Number
1 channel, 30 FPS at 1080p(19201080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1

Virtual Machine Manager
Recommended Virtual Machine Instances
4
Recommended Virtual DSM Number
4 (including 1 Free License)
Notes
The specifications vary depending on system configuration and memory size.

VPN Server
Maximum Connections
20

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