RackStation RS4017xs+
Highly scalable NAS designed for virtualization, data-intensive applications and service continuity for large scale businesses

Overview:

Designed to meet tomorrow's intensive storage requirements, Synology RackStation RS4017xs+ provides reliable, high-performance network attached storage for enterprises seeking rock-solid stability along with business collaboration applications and virtualization acceleration. With up to 40 drive scalability, RS4017xs+ simplifies data management with minimal time investment required for setup and maintenance. Synology RS4017xs+ is backed by Synology's 5-year limited warranty.

• 3U chassis and 16 drive trays design to provide high storage capacity
• Ultra-high performance of over 4,900 MB/s sequential read throughput and 690,000 sequential read IOPS
• Intel Xeon D-1541 8-core CPU and 8GB (up to 64GB) DDR4 ECC UDIMM
• Dual 10GBase-T ports and optional 10GbE NICs support, providing up to 6 x 10GbE ports for maximum performance throughput
• Scale up to 40 drives with 2 x Synology RX1217/RX1217RP
• Complete virtualization solution for VMware, Citrix, Microsoft Hyper-V, and OpenStack
• Advanced Btrfs file system offering 65,000 system-wide snapshots and 1,024 snapshots per shared folder
• Backed with 5 year, next business day replacement service

Powerful Storage Solution with Ample Upgradability

Equipped with an Intel Xeon D-1541 8-core CPU, 8GB DDR4 ECC UDIMM, and 16 x 3.5" drive bays in a 3U form factor , Synology RS4017xs+ is the ideal companion for intensive data processing, video post-productions, and virtualization applications that increasingly require more storage space.

RS4017xs+ comes natively with dual 10GBase-T ports and four Gigabit ports, along with two 8-lane PCIe 3.0 slots for additional high performance network interface cards (NICs). When configured with 6 x 10GbE ports with Link Aggregation enabled, RS4017xs+ provides ultra-high sequential throughput at over 4,900 MB/s and 690,000 sequential IOPS .

System memory and storage capacity of RS4017xs+ can be further extended. Up to 64GB of DDR4 ECC UDIMM can be installed to support multiple virtualization instances, and with two Synology RX1217/RX1217RP2 expansion units connected, a combined total of 40 drive bays can be freely arranged for storage management.

Rock-Solid Data Protection

The Snapshot Replication application provides schedulable, near-instantaneous data protection. It replicates 65,000 system-wide backup copies to offsite servers and local volumes, bringing near-instantaneous data protection and ensuring data in shared folders or virtual machines in iSCSI LUNs remain available in the event of a disaster.

With block-level incremental backup and cross-version deduplication, Synology Hyper Backup provides multi-version backup with optimized storage space utilization and allows multiple backup destinations to local shared folders, external hard drives, network shared folders, rsync server, and public cloud services.

Btrfs: Next Generation Storage Efficiency

RS4017xs+ integrates the Btrfs file system, bringing the most advanced storage technologies to meet the management needs of modern large-scale businesses:

• Flexible Shared Folder / User Quota System provides comprehensive quota control on all user accounts and shared folders.
• Advanced snapshot technology with customizable backup schedule allows up to 1,024 copies of shared folder backups and 65,000 copies of system-wide snapshots without occupying huge storage capacity and system resources.
• File or folder level data restoration brings huge convenience and saves time for users who wish to restore only a specific file or folder.
• File self-healing: Btrfs file system is able to auto-detect corrupted files with mirrored metadata, and recover broken data using the supported RAID volumes, which include RAID 1, 5, 6, and 10.

Virtualization Ready

RS4017xs+ provides seamless storage solutions for virtualization environments, including VMware, Citrix, Hyper-V, and OpenStack. With VMware vSphere 6 and VAAI integration certified, RS4017xs+ helps offload specific storage operations and optimizes computation power for unparalleled performance and efficiency in VMware environments. Windows Offloaded Data Transfer (ODX) and Synology Advanced LUN support greatly improves the efficiency on massive data transfer and migration. With OpenStack support, RS4017xs+ can be used as a block-based storage component for servers complying with the Cinder API.

Comprehensive Business Applications

Powered by the innovative Synology DiskStation Manager (DSM), RS4017xs+ comes fully-equipped with applications and features designed specifically for largescale business:

• Windows AD and LDAP support allowing easy integration with existing business directory services without recreating user accounts.
• Windows ACL support provides fine-grained access control and efficient privilege settings, allowing RS18017xs+ to fit seamlessly into current infrastructure.
• MailPlus allows your business to set up a secure, reliable, and private mail server while giving your employees a modern mail client for receiving and sending messages.
• Powerful collaboration suite that includes Synology Office, Calendar and Chat for secure and high-performance private communications and user-friendly content organization.

Reliability, Availability & Disaster Recovery

System reliability is of paramount importance to businesses which depend upon their commercial servers every day. RS4017xs+ responds to these concerns with wide-ranging availability and redundancy features:

• Synology High Availability ensures a seamless transition between clustered servers in the event of server failure with minimal impact on applications.
• Redundant power supplies, system fans and network ports with failover support ensure maximum continuous service uptime.
• High-reliability system design, including fan-less CPU heatsink and passive cooling technology, prevents single points of failure.
• DDR4 ECC RDIMM reduces power consumption and has error detection and correction capabilities during data transmission.

Features:

Powerful storage solution

RS4017xs+ provides rock-solid storage solution with ultra-high performance at over 844,000 sequential read IOPS and 5,900 MB/s sequential read throughput1. DDR4 ECC UDIMM and 10GbE connectivity guarantees data accuracy and performance for mission-critical environment.

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.

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.

Btrfs: Next generation storage efficiency

Btrfs file system introduces the most advanced storage technologies to meet the management needs of modern large scale businesses:

• Flexible Shared Folder/User Quota System provides comprehensive quota control on all 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 makes data recovery fast and flexible
• Automatic file self-healing detects and recovers corrupted files without user intervention
  

Powered by Synology DSM

Product Views:

Technical Specifications:

1. Power button and indicator
2. Beep off button
3. Drive status indicator
4. Drive tray
5. PSU fan
6. Power port
7. PSU indicator
8. Console port
9. 1GbE RJ-45 port
10. 10GbE RJ-45 port
11. USB 3.0 port
12. Expansion port
13. PCIe 3.0 slot
14. Reset button

Hardware Specifications:
CPU
CPU Model	Intel Xeon D-1531
CPU Architecture	64-bit
CPU Frequency	8-Core 2.1 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine
Memory
System Memory	8 GB DDR4 ECC RDIMM
Memory Module Pre-installed	8GB (1 x 8GB)
Total Memory Slots	4
Memory Expandable up to	64 GB (16 GB x 4)
Storage
Drive Bay(s)	13
Maximum Drive Bays with Expansion Unit	40
Compatible Drive Type*	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD
Maximum Internal Raw Capacity	160 TB (10 TB drive x 16) (Capacity may vary by RAID types)
Maximum  Raw Capacity with Expansion Units	400 TB (10 TB drive x 96) (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
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. 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)
RJ-45 10GbE LAN Port	2 (with Link Aggregation / Failover support)
USB 3.0 Port	2
Expansion Port	2
PCIe
PCIe Expansion	2 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 Center.
Appearance
Size (Height X Width X Depth)	132.3 mm x 482 mm x 656.5 mm
Weight	17.4 kg
Others
System Fan	80 mm x 80 mm x 3 pcs
Fan Speed Mode	Full-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 / Adapter	2 x 800W
AC Input Power Voltage	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase
Power Consumption*	136.4 W (Access)  69.2 W (HDD Hibernation)
British Thermal Unit	465.7 BTU/hr (Access)  236.3 BTU/hr (HDD Hibernation)
Redundant Power Supply (for xs+ and RP model)
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
Other
Certification	FCC Class A CE Class A BSMI Class A
Warranty	5 Years
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 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:
Networking protocol	CIFS, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP)
File system	Internal: Btrfs, ext4 External: Btrfs, ext4, ext3, FAT, NTFS, HFS+, exFAT3
Supported RAID type	Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
Storage management	Maximum single volume size: 108TB / 200TB (at least 32GB RAM required, for RAID 5 or RAID 6 groups only) Maximum internal volumes: 1,024 Maximum iSCSI Targets: 128 Maximum iSCSI LUNs: 512 iSCSI LUN clone / snapshot support
File sharing capability	Maximum local user account: 16,000 Maximum local group: 512 Maximum shared folder: 512 Maximum concurrent SMB/NFS/AFP/FTP connection: 2,048
Privilege	Windows Access Control List (ACL)
Virtualization	VMware vSphere 6, Microsoft Hyper-V, Citrix, OpenStack
Directory service	Windows AD integration: Domain users login via Samba (CIFS) / AFP / FTP / File Station, LDAP integration
Security	FTP over SSL / TLS, IP auto-block, firewall, encrypted network backup over Rsync, HTTPS connection
Utilities	Synology Web Assistant, Cloud Station Drive, Cloud Station Backup, Cloud Sync Decryption Tool, Evidence Integrity Authenticator, Snapshot Manager for VMware, Snapshot Manager for Windows, NFS Plug-in for VMware VAAI
Supported client	Windows 7 onward, Mac OS X 10.10 onwards
Supported browser	Chrome, Firefox, Internet Explorer 9 onwards, Safari 8 onwards; Safari (iOS 7 onwards), Chrome (Android 4.0 onwards) on tablets
Interface language	English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svensk, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český
Applications:
File Station	Virtual drives, remote folders, Windows ACL editor, compressing/extracting archived files, bandwidth control for specific users/groups, creating sharing links, transfer logs
Backup solutions	Network backup; local backup; desktop backup; configuration backup; OS X Time Machine; backup data to public cloud; shared folder sync - maximum task number: 32
FTP Server	Bandwidth control for TCP connections, custom FTP passive port range, anonymous FTP, FTP SSL/TLS and SFTP protocol, boot over the network with TFTP and PXE support, transfer logs
High Availability Manager	Combines two RS18017xs+ into one high-availability cluster
Security Advisor	Malware detection / removal, user account / password, network, system-related security scan
iOS/Android applications	DS cloud, DS file, DS finder, DS cam, DS note, MailPlus, Chat
Windows Phone applications	DS file, DS finder
Add-on Packages:
Antivirus Essential	Full system scan, scheduled scan, white list customization, virus definition auto update
Chat	A messaging service that runs locally, ensuring the safety of sensitive corporate information stored on company's premises and providing users a messaging experience equivalent to that of using a public cloud. Built to work with Office and Calendar seamlessly.
Cloud Station Suite	Maximum concurrent file transfers: 2,000, retain historical and deleted file versions
Cloud Sync	One or two-way synchronization with public cloud storage providers including Amazon Cloud Drive, Amazon S3-compatible storage, Baiduyun, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, Megafon Disk, Microsoft OneDrive, OpenStack Swift-compatible storage, WebDAV servers, Yandex Disk
Log Center	SSL connection, log rotation: 6 months, 1 year, 2 years, 3 years, email notification
MailPlus	Intuitive webmail interface for MailPlus Server; customizable mail labels, filters and user interface
MailPlus Server	Secure, reliable, and private mail solution with High-availability, load balancing, security and filtering design (Includes 5 free email account licenses, additional accounts require the purchasing of additional licenses)
Note Station	Rich-text note organization and versioning, encryption, sharing, media embedding and attachments
Office	Real-time collaboration on your private cloud. Collaborate on documents and spreadsheets on your secured company network while enjoying the convenience equivalent to that of a public cloud.
Storage Analyzer	Volume and quota usage, total size of files, volume usage and trends based on past usage, size of shared folders, largest/most/least frequently modified files
Surveillance Station	Maximum IP camera: 90 (total of 2,700 FPS at 720p, H.264) (Includes two free camera licenses, additional cameras require the purchasing of additional licenses)
VPN Server	Maximum connections: 30; supported VPN protocol: PPTP, OpenVPN, L2TP
Web Station	Virtual host (up to 30 websites), PHP/MariaDB, third-party application support
Other packages	Additional 3rd-party packages are available on Package Center
Environment & Packaging:
Environment	RoHS Compliant
Packaging Content	RS4017xs+ main unit Quick Installation Guide Accessory pack 2 x AC power cord
Optional Accessories	8GB / 16GB DDR4-2133 ECC UDIMM (RAMEC2133DDR4-8G / RAMEC2133DDR4-16G) Synology E10G17-F2 / E10G15-F1 10Gbps Ethernet adapters Synology Expansion Unit RX2417sas/RX1217sas Synology RKS1317-Rail Kit Sliding Synology Surveillance Video Decoder VS360HD Surveillance Device License Pack MailPlus License Pack Docker DSM License Pack

*Model specifications are subject to change without notice. Please refer to www.synology.com for the latest information.
¹ Performance figures may vary depending on environment, usage and configuration.
² RS4017xs+ supports up to 2 Synology Expansion Unit RX1217/RX1217RP, sold separately.
³ exFAT Access is purchased separately in Package Center

Performance:

XS(+) Series

Synology strives to enhance the performance of our NAS with every software update, even long after a product is launched. For enterprises and users that demand uncompromising performance from their servers, check the figures below to find the most suitable choice.

Aggregated 10GbE SMB - Sequential Throughput (64KB)

Model	RC18015xs+	RS18017xs+	RS4017xs+	RS3617xs+	RS3617RPxs	RS3617xs	DS3617xs	DS3018xs
Read	2153.26	4871.75	5959.87	5293.29	3914.71	3011.78	2358.6	2231.45
Write	1646.98	2077.93	2494.28	2062.35	1909.8	1634.64	1923.5	878.64

Aggregated 10GbE SMB - Sequential Throughput via Encrypted Shared Folder (64KB)

Model	RC18015xs+	RS18017xs+	RS4017xs+	RS3617xs+	RS3617RPxs	RS3617xs	DS3617xs	DS3018xs
Read	2140.52	3154.22	3550.04	3040.51	2384.06	2165.94	2198.39	1308.42
Write	1165.17	1581	1892.7	1603.86	1177.12	1157.94	1129.36	544.49

Aggregated 10GbE SMB - Sequential IOPS (4KB)

Model	RC18015xs+	RS18017xs+	RS4017xs+	RS3617xs+	RS3617RPxs	RS3617xs	DS3617xs	DS3018xs
Read	339248.25	677184.62	844590.31	693865.69	491753.22	334383.03	450188.62	265013.31
Write	222354.08	386948.28	487332.22	408227.22	285828.44	220133.81	277429.56	136649.5

Aggregated 10GbE SMB - Random IOPS (4KB)

Model	RC18015xs+	RS18017xs+	RS4017xs+	RS3617xs+	RS3617RPxs	RS3617xs	DS3617xs	DS3018xs
Read	122037.35	188257.09	224750.75	175939.66	123905.24	112116.19	121069.69	63283.13
Write	49430.67	75536.17	70285.04	68485.04	65774.18	47137.35	65832.91	42229.71

10GbE iSCSI - Random IOPS (4KB)

Model	RC18015xs+	RS18017xs+	RS4017xs+	RS3617xs+	RS3617RPxs	RS3617xs	DS3617xs	DS3018xs
Read	152559.09	204686.62	252087.59	198761.78	143549.44	146113.95	141099.25	100753.34
Write	77043.49	82728.79	94094	82147.87	75815.4	84760.06	71464.02	37810.4

1GbE Web Server - HTML Response Efficiency

Model	RC18015xs+	RS18017xs+	RS4017xs+	RS3617xs+	RS3617RPxs	RS3617xs	DS3617xs	DS3018xs
Responses per second	206844.45	206230.02	206829.64	206029.56	203557.34	207195.69	203230.31	154099.02

1GbE Web Server - PHP Response Efficiency

Model	RC18015xs+	RS18017xs+	RS4017xs+	RS3617xs+	RS3617RPxs	RS3617xs	DS3617xs	DS3018xs
Responses per second	59770.68	82017.29	94612.93	82507.9	60403.53	59953.64	57127.87	31322.65

NAS:

• Operating System: DSM 6.1
• Volume Type: RAID 5
• Drives:
  • RC18015xs+ with RXD1215sas, RS18017xs+: Fully loaded with HGST HUSMH8020BSS200 SAS SSD
  • DS3018xs: Fully loaded with Intel DC S3710 series 800GB SSDSC2BA800G4 SATA SSD
  • Other models: Fully loaded with Intel 535 series 240GB SSDSC2BW240H6 SSD
• Memory:
  • RS18017xs+: 32GB DDR4 ECC RDIMM (16GB x 2)
  • RS4017xs+, RS3617xs+, RS3617RPxs: 16GB DDR4 ECC UDIMM (8GB x 2)
  • DS3018xs: 32GB DDR4 ECC SO-DIMM (16GB x 2)
  • Other models: System default capacity
• File System: Btrfs
• Aggregated 10GbE SMB and 10GbE iSCSI network environment:
  • RS18017xs+, RS4017xs+, RS3617xs+: 6 x 10GbE ports (built-in 10GbE ports + 2 x Intel X540-T2 NIC); MTU 9000; connected to client PCs via Netgear M4300-24X24F switch
  • RS3617RPxs, RS3617xs: 4 x 10GbE ports (2 x Intel X520-DA2 NIC); MTU 9000; connected to client PCs via Juniper QFX5100-48S-AFO switch
  • RC18015xs+, DS3617xs, DS3018xs: 2 x 10GbE ports (1 x Intel X520-DA2 NIC); MTU 9000; connected to client PCs via Juniper QFX5100-48S-AFO switch

Client PC:

• For RS18017xs+, RS4017xs+, RS3617xs+: Intel Core i7-4790 3.60GHz; 4GB DDR3-1600; Synology E10G17-F2 NIC; MTU 9000; Windows 7 64 bit
• For other models: Intel Core i7-4790 3.60GHz; 4GB DDR3-1600; Intel X520-DA2 NIC; MTU 9000; Windows 7 64 bit
• IOMeter configuration: Continuously read from/write to a single 16GB file for 3 minutes; Block size: 64KB for SMB, 4KB for IOPS and iSCSI
• 1GbE Web Server Network Environment:
  • Intel Core i7-6700 3.40GHz; 16GB DDR4-2133; Intel Gigabit CT; MTU 1500; Ubuntu 16.04
  • (html) wrk -t 8 -c [10-250] -d 60s -H "Host: benchmark" http://DS_IP/index.html
  • (php) wrk -t 8 -c [10-250] -d 60s -H "Host: benchmark"http://DS_IP/echo.php

Special Note:

• Performance figures are achieved in the Synology lab by using very powerful client computers with optimized network settings, and could vary in different environments. Regular office desktop or notebook computers may not be able to reproduce these figures.

Documentation:

Download the Synology RackStation RS4017xs+ Datasheet  (PDF).