Synology RS3621RPxs

Synology RS3621RPxs

CPU Model Intel Xeon D-1531
CPU Architecture 64-bit
CPU Frequency 6-core 2.2 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI) V
System Memory 8 GB DDR4 ECC UDIMM
Memory Module Pre-installed 8 GB (8 GB x 1)
Total Memory Slots 4
Maximum Memory Capacity 64 GB (16 GB x 4)

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 on the recommended memory configurations, visit here.
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.

Storage
Drive Bays 12
Maximum Drive Bays with Expansion Unit 36 (RX1217/RX1217RP x 2)
Compatible Drive Type* (See all supported drives)

3.5" SATA HDD
2.5" SATA SSD

Maximum Single Volume Size*

200 TB (32 GB RAM required, for RAID 5 or RAID 6 groups only)
108 TB

Hot Swappable Drive V

Storage Pool and volume creation require all drives to be listed as compatible on the device model's compatibility list.
"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.
Each internal volume (may consist of multiple drives) is expandable up to 108 TB (with memory less than 32 GB) or 200 TB (with memory equal to or greater than 32 GB).

External Ports
RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support)
USB 3.2 Gen 1 Port* 2
Expansion Port 2
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 2 x Gen3 x8 slots (x8 link)
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) 2U
Size (Height x Width x Depth) 88 mm x 482 mm x 724 mm
Weight 14.5 kg
Rack Installation Support* 4-post 19" rack (Synology Rail Kit - RKS1317)
Notes The rail kit is sold separately
Others
System Fan 80 mm x 80 mm x 4 pcs
Fan Speed Mode

Full-Speed Mode
Cool Mode
Quiet Mode

Easy Replacement System Fan V
Power Recovery V
Noise Level* 50.2 dB(A)
Scheduled Power On / Off V
Wake on LAN / WAN V
Power Supply Unit / Adapter 500 W
Redundant Power Supply V
AC Input Power Voltage 100 V to 240 V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption* 140.01 W (Access)
65.94 W (HDD Hibernation)
British Thermal Unit 477.43 BTU/hr (Access)
224.86 BTU/hr (HDD Hibernation)

Power consumption is measured when it is fully loaded with Synology 8TB HAT5300-8T 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)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH
Certification

FCC
CE
BSMI
VCCI
RCM
EAC
CCC
KC
UL

Warranty
5 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
RoHS Compliant
Packaging Content

Main Unit X 1
Accessory Pack X 1
AC Power Cord X 2
Quick Installation Guide X 1

Optional Accessories

DDR4 ECC UDIMM: D4EC-2666-8G/D4EC-2666-16G
Expansion Units: RX1217/RX1217RP
3.5" SATA HDD: HAT5300
2.5" SATA SSD: SAT5200
M. 2 SSD & 10GbE Combo Adapter Card: E10M20-T1
M. 2 SSD Adapter Card: M2D20
10GbE Network Interface Card: E10G18-T2/E10G18-T1/E10G17-F2
Rail Kit Sliding: RKS1317
VisualStation: VS960HD/VS360HD
Surveillance Device License Pack

All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
DSM Specifications
Storage Management
Maximum Internal Volume Number 128
SSD Read / Write Cache (White Paper) V
SSD TRIM V
RAID Group V
Supported RAID Type

RAID F1
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

RAID F1
RAID 1
RAID 5
RAID 6
RAID 10

Volume Expansion by Adding a HDD

RAID F1
JBOD
RAID 5
RAID 6

Global Hot Spare Supported RAID Type

RAID F1
RAID 1
RAID 5
RAID 6
RAID 10

File Services
File Protocol CIFS/AFP/NFS/FTP/WebDAV
Maximum Concurrent CIFS/AFP/FTP Connections 2,000
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) 10,000
Windows Access Control List (ACL) Integration V
NFS Kerberos Authentication V
Notes

Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration.
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 16,000
Maximum Local Groups 512
Maximum Shared Folder 512
Maximum Shared Folder Sync Tasks 32
High Availability
Synology High Availability V
Log Center
Syslog Events per Second 3,000
Virtualization
VMware vSphere with VAAI V
Windows Server 2016 V
Windows Server 2019 V
Citrix Ready V
OpenStack V
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
Internet Explorer 10 onwards
Safari 10 onwards
Safari (iOS 10 onwards)
Google Chrome (Android 6.0 onwards)

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
Add-on Packages view the complete package list
Antivirus by McAfee (Trial)
Central Management System
Synology Chat
Maximum Users 4,000
Notes

The number of concurrent HTTP connections for Synology Chat was configured to the maximum.
For tested models with expandable memory, the maximum amount of RAM was installed.

Document Viewer
Download Station
Maximum Concurrent Download Tasks 80
exFAT Access (Optional)
iSCSI Manager
Maximum iSCSI Target Number 256
Maximum iSCSI LUN 512
iSCSI LUN Clone/Snapshot, Windows ODX V
Synology MailPlus / MailPlus Server
Free Email Accounts 5 (Licenses required for additional accounts)
Maximum Number of Concurrent Users 800
Maximum Server Performance 4,235, 000 emails per day, approx. 129GB
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
DLNA Compliance V
Moments
Facial Recognition V
Subject Recognition V
Auto Color & Rotate V
Moments Select V
Snapshot Replication
Maximum Snapshots per Shared Folder 1,024
Maximum of System Snapshots 65,536
Surveillance Station
Maximum IP cam (Licenses required) 75 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H. 264) 2250 FPS @ 720p (1280x720)
2100 FPS @ 1080p (1920x1080)
1500 FPS @ 3M (2048x1536)
900 FPS @ 5M (2591x1944)
550 FPS @ 4K (3840x2160)
Total FPS (H. 265) 2250 FPS @ 720p (1280x720)
2250 FPS @ 1080p (1920x1080)
2250 FPS @ 3M (2048x1536)
1500 FPS @ 5M (2591x1944)
900 FPS @ 4K (3840x2160)
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.
The maximum channel number also includes devices installed on Virtual DSM.
Total FPS may be affected by other services running at the same time (e. g. , archive tasks performed by Archive Vault).

Synology Drive
Recommended Number of Hosted Files 3,000, 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 1,800 (the number of connections that can be maintained when the recommended number of hosted files was reached)
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
Maximum Users 3,000
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
Virtual Machine Manager
Recommended Virtual Machine Instances 12 (Learn more)
Recommended Virtual DSM Number (Licenses required) 12 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections 40