Refurbished DiskStation DS1618+

Refurbished DiskStation DS1618+

High capacity storage and data protection for anyone

Product Image DS1618plus
Product Image DS1618plus
Synology Certified RefurbishedAccess Synology solutions in a cost-effective and environmentally responsible way. All certified refurbished products are put through extensive testing, comply with stringent quality standards, and come with a 2-year warranty.More about Synology Certified Refurbished

CPU

Quad-core 2.1GHz with AES-NI encryption engine

Memory

4GB DDR4, expandable up to 32GB

Scalability

Expand up to 16 drives
with two DX517 expansion units

Rise to the challengePrepare your DS1618+ for heavy workloads or upgrade flexibly as your business continues to grow. Use add-in cards to add bandwidth, fast SSD cache, or both.Maximize bandwidthHandle heavier input/output and serve more users with dual-port Synology 10GbE network interface cards.Boost storage performanceAccelerate HDD arrays with an M.2 NVMe SSD adapter card and SNV3000 series SSDs, or install SAT5200 SATA SSDs in drive bays to increase performance with SSD cache.Do both with one cardAdd both 10GbE connectivity and M.2 NVMe SSD slots for SSD cache with a single combination NIC and adapter card.

Storage that fits your needs

Make the most of high-performance networking and file access without taking up unnecessary space. DS1618+ comes equipped with 6 bays and can scale up to 16 bays with 2 DX517 expansion units as your data needs grow.

The DS1618+ supports up to 288 TB of raw capacity after expansion when using 18 TB drives
Storage that fits your needs
Fully certified storage virtualization solutionsSynology 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.

Ultimate Backup Solution

DS1618+ integrates various backup applications into an intuitive user interface, offering durable storage technologies to safeguard your valuable data on any device.

Active Backup for Business

Centralize backup tasks for VMware, Windows, and file servers. Restore whatever you want fast and reliably when needed.

Learn more

Hyper Backup

Comprehensively back up your data to a local shared folder, an external device, another Synology NAS, an rsync server, or a public cloud to ensure data safety.

Learn more

Drive Package

Safeguard your computer with Synology Drive Client. Effortlessly perform real-time data backups and point-in-time file recovery.

Learn more

Active Backup for Microsoft 365 / Google Workspace

Protect corporate data stored on the cloud. On-premise backup solution with a centralized dashboard. Optimize storage efficiency with single instancing and block-level deduplication technology.

Microsoft 365Google Workspace

Works best with Synology drives

Engineered to handle intensive 24/7 workloads, Synology drives consistently deliver top-grade performance.

Powered by Synology DiskStation Manager

Hardware Overview
  • 1Status indicator
  • 2Alert indicator
  • 3Power button and indicator
  • 4LAN indicator
  • 5Drive status indicator
  • 6Drive tray
  • 7USB 3.0 port
  • 8Power port
  • 9Kensington Security Slot
  • 10eSATA port
  • 11System fan
  • 121GbE RJ-45 port
  • 13PCIe expansion slot
  • 14Reset button
  • 15USB 3.0 port
Notes:PCIe add-in cards, expansion units, and storage drives are sold separately. Refer to the compatibility list for compatible devices.Synology SNV3000 series M.2 NVMe SSD drives can be installed through the built-in M.2 slots to enable SSD caching or create SSD storage pools. Drives are sold separately.Storage figure calculated based on a RAID 0 configuration. Total storage capacity may vary depending on hard drives used and RAID configuration.
Hardware Specs Software Specs
Hardware Specifications
CPU
CPU
CPU Model Intel Atom C3538
CPU Quantity 1
CPU Cores 4
CPU Threads 4
CPU Architecture 64-bit
CPU Frequency 2.1 GHz
Hardware Encryption Engine
Memory
Memory
System Memory 4 GB DDR4 non-ECC SODIMM
Total Memory Slots 2
Maximum Memory Capacity 32 GB (16 GB x 2)
Notes
  • Synology may revise pre-installed memory module specifications in response to component lifecycle and supply conditions. All revised components undergo the same rigorous validation to ensure equivalent compatibility, stability, and 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.
  • For more information on memory upgrade limitations, visit here.
  • For more information on the recommended memory configurations, visit here.
Storage
Storage
Drive Bays 6
Maximum Drive Bays with Expansion Unit 16 (DX517 x 2)
Drive Type (See all supported drives)
  • 3.5" SATA HDD
  • 2.5" SATA HDD
  • 2.5" SATA SSD
Hot Swappable Drive*
External Ports
External Ports
RJ-45 1GbE LAN Port 4
USB 3.2 Gen 1 Port 3
Expansion Port 2
Expansion Port Type eSATA
PCIe
PCIe
PCIe Expansion 1 x Gen3 x8 slot (x4 link)
Appearance
Appearance
Size (Height x Width x Depth) 166 mm x 282 mm x 243 mm
Weight 5.05 kg
Others
Others
System Fan 92 mm x 92 mm x 2 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Brightness Adjustable Front LED Indicators
Power Recovery
Noise Level* 23.7 dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter 250 watts
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption 56.86 watts (Access)
25.76 watts (HDD Hibernation)
British Thermal Unit 194.01 BTU/hr (Access)
87.9 BTU/hr (HDD Hibernation)
Notes
  • Power consumption is measured when it is 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 meter 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
Temperature
Operating Temperature 0°C to 40°C (32°F to 104°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Operating Humidity 8% to 80% RH
Storage Humidity 5% to 95% RH
Certification
Certification
  • EAC
  • CCC
  • KC
  • BIS
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
Warranty
Warranty
2 Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
Environment
Environment
RoHS Compliant
Packaging Content
Packaging Content
  • Main Unit X 1
  • Accessory Pack X 1
  • AC Power Cord X 1
  • RJ-45 LAN Cable X 2
  • Quick Installation Guide X 1
Optional Accessories
Optional Accessories
Notes
  • All memory modules will operate at the maximum frequency specified by the CPU manufacturer.
  • The original non-ECC memory modules must be removed before the optional ECC memory modules can be installed. For more information, visit here.
DSM Specifications
Maximum Single Volume Size 108 TB
Maximum Internal Volume Number 64
SSD Read/Write Cache (Determining cache size)
SSD TRIM
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 a HDD
  • Synology Hybrid RAID
  • JBOD
  • RAID 5
  • RAID 6
Global Hot Spare Supported RAID Type
  • Synology Hybrid RAID
  • RAID 1
  • RAID 5
  • RAID 6
  • RAID 10
Notes
  • Each internal volume (may consist of multiple drives) is expandable up to 108TB.
  • Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
  • Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and the amount of system metadata stored.
Internal Drives
  • Btrfs
  • ext4
External Drives
  • Btrfs
  • ext4
  • ext3
  • FAT32
  • NTFS
  • HFS+
  • exFAT
File Protocol
  • SMB
  • AFP
  • NFS
  • FTP
  • WebDAV
  • Rsync
Maximum Concurrent SMB/AFP/FTP Connections 1,000
Maximum Concurrent SMB/AFP/FTP Connections (with RAM expansion) 2,000
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Notes
  • During testing, the maximum number of SSDs supported by this model is installed in a RAID 5 configuration.
  • Regarding data concerning tests with RAM expansion, all memory slots are installed with the maximum capacity of supported RAM.
  • The testing standard was based on the maximum number of concurrent connections supported by this model. During the testing, 25% of the connections were used to transfer files concurrently. The transfer process guaranteed that the connections were not interrupted; the minimum transfer speed was not guaranteed.
Maximum Local User Accounts 2,048
Maximum Local Groups 256
Maximum Shared Folder 512
Maximum Shared Folder Sync Tasks 16
Maximum Hybrid Share Folders 10
Folder and Package Backup
Entire System Backup
Notes Full-system backup requires DSM 7.2 or later.
Synology High Availability
Syslog Events per Second 1,000
Virtualization
Virtualization
VMware vSphere ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5
Microsoft Hyper-V Windows Server 2019, Windows Server 2016
Citrix XenServer XenServer 7
OpenStack Cinder
Supported Protocols SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
Supported Browsers
  • Chrome
  • Firefox
  • Edge
  • Safari
Supported Language English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文
Notes For an updated list of supported browser versions, check the DSM Technical Specifications.
Suggested Users 1,500
Notes
  • When applicable, systems are tested configured with maximum memory and set to allow the maximum number of connections.
  • CPU and RAM usage were both under 80% when the number of maximum users was reached.
Download Station
Download Station
Maximum Concurrent Download Tasks 80
Maximum iSCSI Target Number 128
Maximum LUN 256
LUN Clone/Snapshot, Windows ODX
Free Email Accounts 5 (Additional accounts require purchase of licenses)
Suggested Maximum Users 150
Notes
  • The suggested maximum number of users is based on the following workload: 20% of users with a 20,000 item mailbox randomly performing actions and receiving 240 emails per day, and 80% of users receiving 20 emails per day. Learn more
  • Models with SSD support are tested with a single SSD volume.
  • Models with expandable memory are tested with the maximum supported quantity installed. Learn more about memory requirements.
  • Operating in high-availability mode will incur additional overhead.
  • Features enabled during evaluation: anti-spam, anti-virus, DNSBL, greylist, content scanning, and full-text search (English).
DLNA Compliance
Facial Recognition
Object Recognition
Maximum Snapshots per Shared Folder 512
Maximum Snapshots per LUN 128
Maximum Snapshots per System 65,536
Maximum Replication Tasks for Shared Folders 64
Default Licenses 2 (Additional cameras require purchase of licenses)
Maximum IP Cameras and Total FPS (H.264)
  • 1080p: 40 channels, 960 FPS
  • 3M: 40 channels, 520 FPS
  • 5M: 32 channels, 320 FPS
  • 4K: 24 channels, 240 FPS
Maximum IP Cameras and Total FPS (H.265)
  • 1080p: 40 channels, 1200 FPS
  • 3M: 40 channels, 880 FPS
  • 5M: 40 channels, 520 FPS
  • 4K: 40 channels, 400 FPS
Notes
  • Performance figures are obtained from testing conducted with the device fully populated with drives, with their default memory configuration, and under a continuous recording setup. Actual system capabilities may vary based on configuration, drive performance, enabled features, and the presence of additional workloads.
  • Use NVR Selector to quickly find a suitable model based on your requirements.
  • The number of video channels that can be viewed simultaneously is double the maximum number of cameras for the same codec and resolution.
Recommended Number of Concurrent Sync Clients 550
Maximum 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)
Notes
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Exceeding the recommended numbers above will not block application operations, but may result in longer response time.
  • Btrfs file system and non-encrypted shared folders were used during the aforementioned testing.
Maximum Number of Users 1,800
Notes
  • Models with expandable memory are tested with the maximum supported quantity installed.
  • Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Recommended Virtual Machine Instances 4 (Learn more)
Recommended Virtual DSM Number (Licenses required) 4 (including 1 Free License)
Notes The specifications vary depending on system configuration and memory size.
Maximum Connections 40
Notes: Model specifications are subject to change without prior notice. The figures are based on Synology internal testing. Each performance test is done individually. No other services or applications are processed at the same time. The actual performance may be lower than lab testing figure due to differences in server configuration, deployment, and the number of active operations. If usage requirements exceed the specifications above, please contact our regional partners for professional advice.