RS18017xs+

RackStation RS18017xs+

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
Intel® Xeon® D-1531 6-core processor

RAM options
16 GB DDR4 ECC RDIMM, up to 128 GB

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

Chassis
2U chassis design, 12 SAS/SATA drive bays

Robust scalability and reliability

RS18017xs+ provides flexible storage scalability with the free combination of Synology Expansion Unit RX1217sas and RX2417sas2. Up to 7 Expansion Units can be connected, allowing business to start small and scale big.

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.

Hyper Backup

Store multiple backup versions with block-level incremental data backup and cross-version deduplication.

CMS

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

Cloud Station Suite

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

MailPlus

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

Hardware Specifications 
CPU 
CPU ModelIntel Xeon D-1531
CPU Architecture64-bit
CPU Frequency6-Core 2.2 (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI) 
Memory 
System Memory16 GB DDR4 ECC RDIMM
Memory Module Pre-installed16GB (1 x 16GB)
Total Memory Slots4
Memory Expandable up to128GB (32 GB x 4)
Storage 
Drive Bays12
Maximum Drive Bays with Expansion Unit96 (RX1217sas) / 180 (RX2417sas)
Compatible Drive Type* (See all supported drives)3.5" SATA HDD
 2.5" SATA HDD
 2.5" SATA SSD
 3.5" SAS HDD
 2.5" SAS HDD
 2.5" SAS SSD
  
Maximum Internal Raw Capacity144 TB (12 TB drive x 12) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units1152 TB (144 TB + 12 TB drive x 84) (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 Port1
PCIe 
PCIe Expansion2 x Gen3 x8 slots (x8 link)
Add-in-card supportPCIe 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)88 mm x 482 mm x 724 mm
Weight14.5 kg
Others 
System Fan80 mm x 80 mm x 4 pcs
Fan Speed ModeFull-Speed Mode
 Cool Mode
 Quiet Mode
  
Easy Replacement System Fan 
Power Recovery 
Noise Level*49.8 dB(A)
Scheduled Power On/Off 
Wake on LAN/WAN 
Power Supply Unit / Adapter2 x 500W
AC Input Power Voltage100V to 240V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*141.96 W (Access)
 77.23 W (HDD Hibernation)
British Thermal Unit484.39 BTU/hr (Access)
 263.52 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 Number128
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 Connections2048
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 Synced Files (btrfs)3,000,000 / single file reaction time 530 ms
Maximum Number of Synced Files (ext4)3,000,000 / single file reaction time 229 ms
NotesThe maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time. For more information on file processing capability, please refer to the reaction time for file processing.
 File reaction time refers to the preparation time required for other devices to start downloading a 10KByte file from a Synology NAS after the file has been added to the NAS. 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 Synced Files3,000,000 / single file reaction time 244 ms
Maximum Number of Concurrent Connections for PC Clients1800
NotesThe Btrfs file system was used for the purpose of testing.
 The maximum number of concurrent connections refers to the maximum number of connections that could be maintained when the maximum number of synced files was reached.
 File reaction time refers to the preparation time required for other devices to start downloading a 10KByte file from a Synology NAS after the file has been added to the NAS.
 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 600 (Btrfs) / 700 (EXT4)
Maximum Server Performance3,088,000 (Btrfs) / 3,009,000 (EXT4) emails per day, approx. 94.2 GB (Btrfs) / 91.8 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 Users3000
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 Snapshots of all Shared Folder65536
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)
 1350 FPS @ 3M (2048x1536)
 800 FPS @ 5M (2591x1944)
 800 FPS @ 4K (3840x2160)
Total FPS (H.265)*2700 FPS @ 720p (1280x720)
 2700 FPS @ 1080p (1920×1080)
 2250 FPS @ 3M (2048x1536)
 1350 FPS @ 5M (2591x1944)
 1350 FPS @ 4K (3840x2160)
Total FPS (MJPEG)*1050 FPS @ 720p (1280x720)
 525 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 
Maximum Virtual DSM Number (Licenses required)12 (including 1 Free License) (Learn more)
NotesVirtual Machine Manager is not supported on hosts running Synology High Availability.
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