CPU

CPU Model

• Intel Atom C3538

CPU Architecture

• 64-bit

CPU Frequency

• Quad Core 2.1 GHz

Hardware Encryption Engine (AES-NI)

• Yes

Memory

System Memory

• 2 GB DDR4

Total Memory Slots

• 1

Memory Expandable up to

• 18 GB (2GB + 16 GB)

Note:

• 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.
• This model does not support the ECC feature, regardless of whether the expansion memory is ECC or non-ECC.

Storage

Drive Bays

• 4
  • Pre-populated with 48TB of storage capacity (includes 4 x 12TB Seagate IronWolf Pro HDDs)

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

Note:

• “Compatible drive type” indicates the 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 utilise 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

RJ45 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
  • Note: Add-in cards sold separately

File System

Internal Drives

• Btrfs
• EXT4

External Drives

• Btrfs
• EXT4
• EXT3
• FAT
• NTFS
• HFS+
• exFAT
  • Note: exFAT Access is purchased separately in Package centre.

Appearance

Form Factor (RU)

• 1U

Size (Height x Width x Depth)

• 44 mm x 480 mm x 492.6 mm

Weight

• 6.4 kg

Rack Installation Support

• 4-post 19″ rack (Synology Rail Kit – RKM114/RKS1317)
  • Note: The rail kit is sold separately,

Others

System Fan

• 40 mm x 40 mm x 3 pcs

Fan Speed Mode

• Full-Speed Mode
• Cool Mode
• Quiet Mode

Power Recovery

• Yes

Noise Level

• 27 dB(A)

Scheduled Power On / Off

• Yes

Wake on LAN / WAN

• Yes

Power Supply Unit / Adapter

• 150 W

Redundant Power Supply

• No

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)

British Thermal Unit

• 129.54 BTU/hr (Access)
• 71.57 BTU/hr (HDD Hibernation)

Note:

• Power consumption is measured when it’s 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 metre 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

• EAC
• VCCI
• CCC
• RCM
• KC
• FCC
• CE
• BSMI

Warranty

• 3-year hardware warranty, extendable to 5-year coverage
  • Note: The warranty period starts from the purchase date as stated on your purchase receipt.

Environment

• RoHS Compliant

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 an 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 & 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 Centre

Syslog Events per Second

• 800

Virtualisation

VMware vSphere 6 with VAAI

• Yes

Windows Server 2016

• Yes

OpenStack

• Yes

General Specifications

Networking Protocols

• SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberised 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)

Supported Language

• English
• Deutsch
• Français
• Italiano
• Español
• Dansk
• Norsk
• Svenska
• Nederlands
• Russian
• Polski
• Magyar
• Português do Brasil
• Português Europeu
• Türkçe
• Ceský
• Thai
• Japanese
• Korean
• Chinese (Traditional and Simplified)

Add-on Packages

Antivirus by McAfee (Trial)

• Yes

Central Management System

• Yes

Synology Chat

Maximum Users

• 1,500
  • Note:
    • 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 (Licences required for additional accounts, sold separately)

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 synchronisation 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 Colour & 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 (Licences required, sold separately)

• 40 (including 2 Free Licence)

Total FPS (H.264)

• 1200 FPS @ 720p (1280×720)
• 800 FPS @ 1080p (1920×1080)
• 340 FPS @ 3M (2048×1536)
• 240 FPS @ 5M (2591×1944)
• 120 FPS @ 4K (3840×2160)

Total FPS (H.265)

• 1200 FPS @ 720p (1280×720)
• 1200 FPS @ 1080p (1920×1080)
• 880 FPS @ 3M (2048×1536)
• 480 FPS @ 5M (2591×1944)
• 280 FPS @ 4K (3840×2160)

Total FPS (MJPEG)

• 380 FPS @ 720p (1280×720)
• 250 FPS @ 1080p (1920×1080)
• 190 FPS @ 3M (2048×1536)
• 140 FPS @ 5M (2591×1944)

Note:

• 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)

Note:

• 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

Note:

• 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 @ 1080p(1920×1080), 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 (Licences required, sold separately)

• 4 (including 1 Free Licence)

Notes

• Virtual Machine Manager is not supported on hosts running Synology High Availability.
• The specifications vary depending on system configuration and memory size.

VPN Server

Maximum Connections

• 20

Packaging Content

• 1 x Synology RS820+ Enclosure
• 4 x Seagate IronWolf Pro HDD
• 1 x Accessory Pack
• 1 x AC Power Cord
• 1 x Quick Installation Guide