RackStation RS4017xs+

RackStation RS4017xs+

Highly scalable NAS designed for virtualization, data-intensive applications and service continuity for large scale businesses

Powerful storage solution

RS18017xs+ is built for flexible storage management with ultra-high performance at over 568,000 sequential read IOPS and 4,800 MB/s sequential read throughput. DDR4 ECC RDIMM and 10GbE connectivity guarantees data accuracy and performance for mission-critical environment.

CPU
CPUIntel® Xeon® D-1541 8-core processor

RAM options
8 GB DDR4 ECC UDIMM, up to 64 GB

Network
Two 10GBase-T ports, optional 10GbE NIC support

Chassis
3U chassis design, 16 SATA drive bays

Robust scalability and reliability

Storage capacity of RS4017xs+ can be further scaled up when connected to two Synology Expansion Unit RX1217 or RX1217RP2, providing a total drive number of 40 without disrupting host services.

5 Year Warranty

Synology’s 5-year limited warranty provides hardware replacement and technical support via email and telephone services, maximizing your enterprises’ return on investment.

Synology Replacement Services(SRS)

SRS provides free advance replacement units as early as the next business day in selected regions, maximizing the service uptime for your mission-critical storage and ensuring your business continuity.

Fully certified storage virtualization solutions

Synology iSCSI storage fully supports most virtualization solutions to enhance work efficiency with easy management interface. VMware vSphere 6 and VAAI integration helps offload storage operations and optimizes computation efficiency. Windows Offloaded Data Transfer (ODX) speeds up data transfer and migration rate. OpenStack Cinder support turns your Synology NAS into a block-based storage component.

Next-generation file system for better data protection

The Btrfs file system introduces advanced storage technologies and optimized snapshots to prevent data corruption and reduce maintenance overhead. While ensuring high-level data integrity, it also offers flexible, efficient data protection and recovery tools.

Flexible Shared Folder / User Quota System provides comprehensive quota control on user accounts and shared folders

Snapshot Replication provides schedulable and storage capacity-saving data protection with 1,024 shared folder backups and 65,000 system-wide snapshots

 
File- or folder-level data restoration accelerates data recovery, providing more flexibility for businesses

 
Automatic file self-healing detects and recovers corrupted files without user intervention

Snapshot Replication

Provides schedulable and instantaneous data protection for shared folders and virtual machines on iSCSI LUNs in the event of disaster.

Synology High Availability

Ensures seamless service transition between clustered servers in the event of a server failure.

Cloud Station Suite

Synchronize cross-platform data automatically with file version control on all your devices.

CMS

Manage multiple Synology NAS servers simultaneously on a centralized interface to increase business efficiency.

MailPlus

Secure, reliable, and private mail server solution with an intuitive and modern mail client.

Collaboration Suite

Synology Office, Calendar and Chat guarantee a secure and high-performance private communication and user-friendly content organization.

Hardware Specifications 
CPU
CPU ModelIntel Xeon D-1541
CPU Architecture64-bit
CPU Frequency8-Core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI)
Memory
System Memory8 GB DDR4 ECC UDIMM
Memory Module Pre-installed8GB (1 x 8GB)
Total Memory Slots4
Memory Expandable up to64 GB (16 GB x 4)
Storage
Drive Bays16
Maximum Drive Bays with Expansion Unit40
Compatible Drive Type* (See all supported drives)3.5" SATA HDD
2.5" SATA HDD
2.5" SATA SSD
Maximum Internal Raw Capacity192 TB (12 TB drive x 16) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units480 TB (192 TB + 12 TB drive x 24) (Capacity may vary by RAID types)
Maximum Single Volume Size200 TB (32GB RAM required, for RAID 5 or RAID 6 groups only)
108 TB
Hot Swappable Drive
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 utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more)
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 Port4 (with Link Aggregation / Failover support)
RJ-45 10GbE LAN Port2 (with Link Aggregation / Failover support)
USB 3.0 Port2
Expansion Port2
PCIe
PCIe Expansion2 x Gen3 x8 slots (x8 link)
Add-in-card supportM2D18 - Dual M.2 SATA/NVMe SSD adapter card for SSD cache
PCIe Network Interface Card (Learn more)
File System
Internal DrivesBtrfs
EXT4
External DrivesBtrfs
EXT4
EXT3
FAT
NTFS
HFS+
exFAT*
NotesexFAT Access is purchased separately in Package Center.
Appearance
Size (Height x Width x Depth)132.3 mm x 482 mm x 656.5 mm 
Weight17.4 kg 
Others
System Fan80 mm x 80 mm x 3 pcs
Fan Speed ModeFull-Speed Mode
Cool Mode
Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level*44.7 dB(A) 
Scheduled Power On/Off
Wake on LAN/WAN
Power Supply Unit / Adapter2 x 800W 
AC Input Power Voltage100V to 240V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*136.4 W (Access) 
69.2 W (HDD Hibernation) 
British Thermal Unit465.7 BTU/hr (Access) 
236.3 BTU/hr (HDD Hibernation) 
Redundant Power Supply (for xs+ and RP model)
Environment Temperature
Operating Temperature5°C to 35°C (40°F to 95°F)
Storage Temperature-20°C to 60°C (-5°F to 140°F)
Relative Humidity5% to 95% RH
CertificationEAC
VCCI
CCC
RCM
KC
FCC
CE
BSMI
Warranty5 Years
NotesPower 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 meter 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 ( See more )
Storage Management
Maximum Internal Volume Number1024
Maximum iSCSI Target Number256
Maximum iSCSI LUN512
iSCSI LUN Clone/Snapshot, Windows ODX
SSD Read/Write Cache (White Paper)
SSD TRIM
RAID Group
Supported RAID TypeRAID F1
Basic
JBOD
RAID 0
RAID 1
RAID 5
RAID 6
RAID 10
RAID MigrationBasic to RAID 1
Basic to RAID 5
RAID 1 to RAID 5
RAID 5 to RAID 6
Volume Expansion with Larger HDDsRAID F1
RAID 1
RAID 5
RAID 6
Volume Expansion by Adding a HDDRAID F1
RAID 5
RAID 6
JBOD
Global Hot Spare Supported RAID TypeRAID F1
RAID 1
RAID 5
RAID 6
RAID 10
File Sharing Capacity
Maximum Local User Accounts16000
Maximum Local Groups512
Maximum Shared Folder512
Maximum Shared Folder Sync Tasks32
Maximum Concurrent CIFS/AFP/FTP Connections2000
Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion)10000
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
High Availability Manager
Log Center
Syslog Events per Second3000
Virtualization
VMware vSphere 6 with VAAI
Windows Server 2012
Windows Server 2012 R2
Citrix Ready
OpenStack
Add-on Packages (learn more about the complete add-on package list)
Antivirus by McAfee (Trial)
Central Management System
Chat
Maximum Users6000
NotesThe 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 Devices2000
Maximum Number of Concurrently Connected Devices (with RAM expansion)10000
Maximum Number of Hosted Files (btrfs)3,000,000
Maximum Number of Hosted Files (ext4)3,000,000
NotesThe 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
Download Station
Maximum Concurrent Download Tasks80
Drive
Maximum Number of Hosted Files5,000,000
Maximum Number of Concurrent Connections for PC Clients2,000
NotesThe Btrfs file system was used for the purpose of testing.
The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Drive service.
The maximum number of concurrent connections refers to the maximum number of connections that can be maintained when the maximum number of hosted files was reached.
For tested models with expandable memory, the maximum amount of RAM was installed.
Non-encrypted shared folders were used during the aforementioned testing.
exFAT Access (optional)
MailPlus / MailPlus Server
Free Email Accounts5 (Licenses required for additional accounts)
Recommended MailPlus Client NumberUp to 800 (Btrfs) / 900 (EXT4)
Maximum Server Performance3,618,000 (Btrfs) / 2,738,000 (EXT4) emails per day, approx. 110.4 GB (Btrfs) / 83.6 GB (EXT4)
NotesThe CPU and RAM usages were both under 80% when testing recommended client numbers.
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 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
Moments
Facial recognition
Subject recognition
Office
Maximum Users2900
NotesMultiple 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
PetaSpace
Snapshot Replication
Maximum Snapshots per Shared Folder1024
Maximum of system snapshots65536
Surveillance Station
Maximum IP cam (Licenses required)90 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264)*2700 FPS @ 720p (1280x720) 
2250 FPS @ 1080p (1920×1080) 
900 FPS @ 3M (2048x1536) 
800 FPS @ 5M (2591x1944) 
440 FPS @ 4K (3840x2160)
Total FPS (H.265)*2700 FPS @ 720p (1280x720) 
2700 FPS @ 1080p (1920×1080) 
2340 FPS @ 3M (2048x1536) 
1260 FPS @ 5M (2591x1944) 
800 FPS @ 4K (3840x2160)
Total FPS (MJPEG)*1200 FPS @ 720p (1280x720) 
600 FPS @ 1080p (1920×1080) 
350 FPS @ 3M (2048x1536) 
220 FPS @ 5M (2591x1944)
NotesSurveillance 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.
Video Station
Video TranscodingGroup 1 - Type 1 (See more)
Maximum Transcoding Channel Number1 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 Instances16 (Learn more)
Recommended Virtual DSM Number (Licenses required)16 (including 1 Free License)
NotesVirtual Machine Manager is not supported on hosts running Synology High Availability. 
The specifications vary depending on system configuration and memory size.
VPN Server
Maximum Connections30
Environment & Packaging
EnvironmentRoHS Compliant
Packaging ContentMain Unit X 1
Accessory Pack X 1
AC Power Cord X 2
Quick Installation Guide X 1
Optional AccessoriesSurveillance Device License Pack
RAMEC2133DDR4-8G DDR4 ECC UDIMM
RAMEC2133DDR4-16G DDR4 ECC UDIMM
Expansion Unit: RX1217/RX1217RP X 2
VS360HD
VS960HD
Synology RKS1317 - Rail Kit Sliding
Synology Ethernet Adapter E10G18-T1
Synology Ethernet Adapter E10G15-F1
Synology Ethernet Adapter E10G17-F2
Synology M2D18 M.2 SSD adapter card