CPU

CPU Model

• Intel Xeon D-1527

CPU Architecture

• 64-bit

CPU Frequency

• Quad Core 2.2 (base) / 2.7 (turbo) GHz

Hardware Encryption Engine (AES-NI)

• Yes

Memory

System Memory

• 8 GB DDR4 ECC UDIMM

Memory Module Pre-installed

• 8GB (1 x 8GB)

Total Memory Slots

• 4

Memory Expandable up to

• 64 GB (16 GB x 4)

Storage

Drive Bays

• 4
  • Pre-populated with 48TB of storage capacity (includes 4 x 12TB WD Red Pro HDDs).

Maximum Drive Bays with Expansion Unit

• 16

M.2 Drive Slots

• 2 (NVMe & SATA)

Compatible Drive Type

• 3.5″ SATA HDD
• 2.5″ SATA HDD
• 2.5″ SATA SSD
• M.2 2280 NVMe & SATA SSD

Maximum Internal Raw Capacity

• 56 TB (14 TB drive x 4) (Capacity may vary by RAID types)

Maximum Raw Capacity with Expansion Units

• 224 TB (56 TB + 14 TB drive x 12) (Capacity may vary by RAID types)

Maximum Single Volume Size

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

Hot Swappable Drive

• Yes

Notes

• “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.
• Expansion of the internal volume is only supported if the combined single volume size does not exceed the maximum limit of 108TB or 200TB if upgraded to 32GB RAM or more.

External Ports

RJ-45 1GbE LAN Port

• 4 (with Link Aggregation / Failover support)

USB 3.0 Port

• 2

Expansion Port

• 1

PCIe

PCIe Expansion

• 1 x Gen3 x8 slot (x8 link)

Add-in-card support

• PCIe Network Interface Card

File System

Internal Drives

• Btrfs
• EXT4

External Drives

• Btrfs
• EXT4
• EXT3
• FAT
• NTFS
• HFS+
• exFAT

Notes

• exFAT Access is purchased separately in Package centre.

Appearance

Size (Height x Width x Depth)

• 44 mm x 480 mm x 518.6 mm

Weight

• 8.16 kg

Others

System Fan

• 40 mm x 40 mm x 2 pcs

Fan Speed Mode

• Full-Speed Mode
• Cool Mode
• Quiet Mode

Easy Replacement System Fan

• Yes

Power Recovery

• Yes

Noise Level

• 39.3 dB(A)

Scheduled Power On/Off

• Yes

Wake on LAN/WAN

• Yes

Power Supply Unit / Adapter

• 2 X 150W

AC Input Power Voltage

• 100V to 240V AC

Power Frequency

• 50/60 Hz, Single Phase

Power Consumption

• 68.68 W (Access)
• 34.78 W (HDD Hibernation)

British Thermal Unit

• 234.35 BTU/hr (Access)
• 118.67 BTU/hr (HDD Hibernation)

Redundant Power Supply

• Yes

Environment Temperature

Operating Temperature

• 5°C to 35°C (40°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
• EAC
• VCCI
• CCC
• RCM
• KC

Notes

• Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
• Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in idle; Two G.R.A.S. Type 40AE microphones, each set up at 1 metre away from the Synology NAS front and rear; Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75°C; Humidity: 58.2-61.8%

DSM Specifications

Storage Management

Maximum Internal Volume Number

• 1,024

Maximum iSCSI Target Number

• 256

Maximum iSCSI LUN

• 512

iSCSI LUN Clone/Snapshot, Windows ODX

• Yes

SSD Read/Write Cache

• Yes

SSD TRIM

• Yes

RAID Group

• Yes

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
• RAID 5
• RAID 6
• JBOD

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

• Yes

NFS Kerberos Authentication

• Yes

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 Manager

• Yes

Log centre

• Yes

Syslog Events per Second

• 3,000

Virtualisation

VMware vSphere 6 with VAAI

• Yes

Windows Server 2016

• Yes

Citrix Ready

• Yes

OpenStack

• Yes

Add-on Packages

Antivirus by McAfee (Trial)

• Yes

Central Management System

• Yes

Chat

• Yes

Maximum Users

• 4,000

Notes

• The number of concurrent HTTP connections for 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.

Cloud Station Server

Maximum Number of Concurrently Connected Devices

• 2,000

Maximum Number of Concurrently Connected Devices (with RAM expansion)

• 10,000

Maximum Number of Hosted Files (btrfs)

• 1,000,000

Maximum Number of Hosted Files (ext4)

• 1,000,000

Notes

• The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time.
• The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing.
• Non-encrypted shared folders were used during the aforementioned testing.

Document Viewer

• Yes

Download Station

Maximum Concurrent Download Tasks

• 80

exFAT Access (optional)

• Yes

MailPlus / MailPlus Server

Free Email Accounts

• 5 (Licences required for additional accounts)

Maximum number of concurrent users

• Up to 450

Maximum Server Performance

• 3,363,000 emails per day, approx. 102.6 GB

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.
• Read-write SSD cache was enabled in 5-bay (and above) NAS models with 2 SSDs units 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

PetaSpace

• Yes

Snapshot Replication

Maximum Snapshots per Shared Folder

• 1024

Maximum of system snapshots

• 65536

Surveillance Station

Maximum IP cam (Licences required)

• 75 (including 2 Free Licences)

Total FPS (H.264)

• 2250 FPS @ 720p (1280×720)
• 1050 FPS @ 1080p (1920×1080)
• 600 FPS @ 3M (2048×1536)
• 500 FPS @ 5M (2591×1944)
• 500 FPS @ 4K (3840×2160)

Total FPS (H.265)

• 2250 FPS @ 720p (1280×720)
• 2250 FPS @ 1080p (1920×1080)
• 2250 FPS @ 3M (2048×1536)
• 1875 FPS @ 5M (2591×1944)
• 975 FPS @ 4K (3840×2160)

Total FPS (MJPEG)

• 900 FPS @ 720p (1280×720)
• 450 FPS @ 1080p (1920×1080)
• 280 FPS @ 3M (2048×1536)
• 200 FPS @ 5M (2591×1944)

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

• 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 Connections for PC Clients

• 1,800 (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

• 2,900

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 @ 1080p(1920×1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1

Virtual Machine Manager

Recommended Virtual Machine Instances

• 8

Recommended Virtual DSM Number (Licences required)

• 8 (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

• 40

Environment & Packaging

Environment

• RoHS Compliant

Package Contents

• Main Unit X 1
• WD Red Pro HDD X 4
• Accessory Pack X 1
• AC Power Cord X 2
• Quick Installation Guide X 1