Synology DiskStation DS918+ Diskless 4 Bay NAS
Special Offers
Samsung Galaxy A34 5G 8GB 256GB
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HP Pavilion 15 EH3050AU AMD Ryzen 7 7730U 16GB 1TB SSD
Realme Note 50 4GB 64GB
Tecno Spark 20 Pro Plus 8GB 256GB
Lenovo IdeaPad 1 15AMN7 AMD Ryzen 5 7520U 8GB 512GB SSD
High-speed scalable storage server
Synology DS918+ is designed for small and medium-sized businesses and IT enthusiasts. With a powerful built-in AES-NI hardware encryption engine, DS918+ provides exceptional encrypted file transmission. Also capable of transcoding up to two channels of H.265/H.264 4K videos at the same time, DS918+ is ideal for sharing and storing ultra-high definition media content.
CPU
Quad-core 1.5GHz burst up to 2.3GHz
Network
Dual 1GbE LAN ports
Memory
4GB DDR3L, scalable up to 8GB
Performance
Over 225 MB/s and 221 MB/s encrypted sequential reading and writing
Satisfy your need for performance and capacity
DS918+ supports up to two M.2 NVMe 2280 SSDs, allowing fast system cache creation without occupying internal drive bays. Scalable up to 9 drives with a Synology Expansion Unit DX517, DS918+ answers the need for flexible storage capacity.
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
Learn more about the benefits of using Btrfs
Digital asset protection
Powered by Synology DiskStation Manager (DSM), Synology NAS offers advanced security measures to protect against sudden data loss and potential security holes. Learn more
Security Advisor
Analyzes system settings, password strength, network preferences, and removes any possible malware.
AppArmor
A kernel-level enhancement that blocks malicious programs from accessing unauthorized system resources.
AES 256-bit encryption
Encrypt shared folders and network data transmission to keep data from unauthorized access.
2-step verification
Prevent others from logging in to your DSM by generating a one-time password (OTP) on your mobile device.
Trust Level
Customize the trust level in Package Center to avoid installing packages from untrusted sources, safeguarding your NAS from unknown or tampered package files.
Synchronize files across your devices
Cloud Station Suite provides real-time data synchronization across all your devices and other Synology NAS. "Intelliversioning" keeps the most important file versions to better utilize storage space. Learn more
Cloud Station Sharesync
Cloud Station Drive
Cloud Station Server
DS Cloud
4K Multimedia Server
Access and stream your 4K media content anytime and anywhere. DS918+ supports 4K H.264/H.265 online transcoding via Video Station and DS video, allowing 4K videos to be converted and played on the fly on other computers, smartphones, and media players that originally do not support Ultra HD formats. Learn more
Powered by Synology DSM
Surveillance Station
Complete surveillance solution for recording, monitoring, and management.
Collaboration Suite
Synology Office, Calendar and Chat guarantee a secure and high-performance private communication and user-friendly content organization.
All-in-one server
Save additional investment by integrating various network services, web/mail services, management applications into your NAS.
DSM UI
Award-winning operating system with an intuitive user interface and powerful capabilities.
Desktop Backup
Simplified backup solution for your Mac, PC, and mobile devices.
Security
Comprehensive built-in security tools are constantly updated to tackle evolving threats and protect your devices.
1Status indicator
2Drive status indicator
3Drive tray lock
4USB 3.0 port
5Power button and indicator
6Drive tray
71GbE RJ-45 port
8Reset button
9eSATA port
10Power port
11Fan
12Kensington Security Slot
13USB 3.0 port
14M.2 NVMe SSD slot (bottom side)
| Hardware Specifications | |
| CPU | |
| CPU Model | Intel Celeron J3455 |
| CPU Architecture | 64-bit |
| CPU Frequency | Quad Core 1.5 burst up to 2.3 GHz |
| Hardware Encryption Engine (AES-NI) | |
| Hardware Transcoding Engine | H.264 (AVC), H.265 (HEVC), MPEG-2 and VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 30 |
| Memory | |
| System Memory | 4 GB DDR3L |
| Memory Module Pre-installed | 4GB (1 x 4GB) |
| Total Memory Slots | 2 |
| Memory Expandable up to | 8 GB (4 GB x 2) |
| Storage | |
| Drive Bays | 4 |
| Maximum Drive Bays with Expansion Unit | 9 |
| M.2 NVMe Drive Slots | 2 |
| Compatible Drive Type* (See all supported drives) | 3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD M.2 NVMe 2280 SSD |
| Maximum Internal Raw Capacity | 48 TB (12 TB drive x 4) (Capacity may vary by RAID types) |
| Maximum Raw Capacity with Expansion Units | 108 TB (48 TB + 12 TB drive x 5) (Capacity may vary by RAID types) |
| Maximum Single Volume Size | 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 single volume size is not directly related to the maximum raw capacity. (Learn more) Expansion of the internal volume is only supported if the combined single volume size does not exceed the maximum limit of 108TB. |
| External Ports | |
| RJ-45 1GbE LAN Port | 2 (with Link Aggregation / Failover support) |
| USB 3.0 Port | 2 |
| eSATA Port | 1 |
| 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) | 166 mm x 199 mm x 223 mm |
| Weight | 2.28 kg |
| Others | |
| System Fan | 92 mm x 92 mm x 2 pcs |
| Fan Speed Mode | Full-Speed Mode Cool Mode Quiet Mode |
| Brightness adjustable front LED indicators | |
| Power Recovery | |
| Noise Level* | 19.8 dB(A) |
| Scheduled Power On/Off | |
| Wake on LAN/WAN | |
| Power Supply Unit / Adapter | 100W |
| AC Input Power Voltage | 100V to 240V AC |
| Power Frequency | 50/60 Hz, Single Phase |
| Power Consumption* | 28.8 W (Access) 12.6 W (HDD Hibernation) |
| British Thermal Unit | 98.27 BTU/hr (Access) 42.99 BTU/hr (HDD Hibernation) |
| Environment Temperature | |
| Operating Temperature | 5°C to 40°C (40°F to 104°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). |
| DSM Specifications ( See more ) | |
| Storage Management | |
| Maximum Internal Volume Number | 512 |
| Maximum iSCSI Target Number | 32 |
| Maximum iSCSI LUN | 256 |
| iSCSI LUN Clone/Snapshot, Windows ODX | |
| SSD Read/Write Cache (White Paper) | |
| 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 |
| Volume Expansion by Adding a HDD | Synology Hybrid RAID RAID 5 JBOD RAID 6 (with Expansion Unit) |
| Global Hot Spare Supported RAID Type | Synology Hybrid RAID RAID 1 RAID 5 RAID 6 (with Expansion Unit) RAID 10 (with Expansion Unit) |
| File Sharing Capacity | |
| Maximum Local User Accounts | 2048 |
| Maximum Local Groups | 256 |
| Maximum Shared Folder | 512 |
| Maximum Shared Folder Sync Tasks | 8 |
| Maximum Concurrent CIFS/AFP/FTP Connections | 1000 |
| Windows Access Control List (ACL) Integration | |
| NFS Kerberos Authentication | |
| High Availability Manager | |
| Log Center | |
| Syslog Events per Second | 800 |
| 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 Users | 1500 |
| 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 | 1000 |
| Maximum Number of Concurrently Connected Devices (with RAM expansion) | 2000 |
| Maximum Number of Synced Files (btrfs) | 1,000,000 / single file reaction time 744 ms |
| Maximum Number of Synced Files (ext4) | 1,000,000 / single file reaction time 630 ms |
| Notes | The 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 Tasks | 80 |
| Drive | |
| Maximum Number of Synced Files | 500,000 / single file reaction time 362 ms |
| Maximum Number of Concurrent Connections for PC Clients | 450 |
| Notes | The 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 Accounts | 5 (Licenses required for additional accounts) |
| Recommended MailPlus Client Number | Up to 90 (Btrfs) / 90 (ext4) |
| Maximum Server Performance | 840,000 (Btrfs) / 1,014,000 (ext4) emails per day, approx. 25.6 GB (Btrfs) / 30.9 GB (ext4) |
| Notes | The 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 Users | 1800 |
| 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 |
| Snapshot Replication | |
| Maximum Snapshots per Shared Folder | 1024 |
| Maximum Snapshots of all Shared Folder | 65536 |
| Surveillance Station | |
| Maximum IP cam (Licenses required) | 40 (including 2 Free License) (See All Supported IP Cameras) |
| Total FPS (H.264)* | 1200 FPS @ 720p (1280x720) 840 FPS @ 1080p (1920×1080) 550 FPS @ 3M (2048x1536) 300 FPS @ 5M (2591x1944) 180 FPS @ 4K (3840x2160) |
| Total FPS (H.265)* | 1200 FPS @ 720p (1280x720) 1200 FPS @ 1080p (1920×1080) 900 FPS @ 3M (2048x1536) 550 FPS @ 5M (2591x1944) 300 FPS @ 4K (3840x2160) |
| Total FPS (MJPEG)* | 720 FPS @ 720p (1280x720) 500 FPS @ 1080p (1920×1080) 330 FPS @ 3M (2048x1536) 200 FPS @ 5M (2591x1944) |
| 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. |
| Video Station | |
| Video Transcoding | 4K Group 1 (See more) |
| Maximum Transcoding Channel Number | 2 channel, 30 FPS @ 4K (4096 x 2160), H.264 (AVC)/H.265 (HEVC) or 2 channel, 30 FPS @ 1080p (1920×1080), H.264 (AVC)/H.265 (HEVC)/MPEG-2/VC-1 |
| Virtual Machine Manager | |
| Maximum Virtual DSM Number (Licenses required) | 4 (including 1 Free License) (Learn more) |
| Notes | Virtual Machine Manager is not supported on hosts running Synology High Availability. |
| VPN Server | |
| Maximum Connections | 20 |
| Environment & Packaging | |
| Environment | RoHS Compliant |
| Packaging Content | Main Unit X 1 Accessory Pack X 1 AC Power Adapter X 1 AC Power Cord X 1 RJ-45 LAN Cable X 2 Quick Installation Guide X 1 |
| Optional Accessories | Surveillance Device License Pack D3NS1866L-4G RAM Module Expansion Unit: DX517 X 1 VS360HD VS960HD |
| Brand | Synology |
|---|---|
| Wi-Fi | No |
| Hard Disk Capacity | No Capacity |
| Warranty | 7 Day Replacement |
| LAN | Yes |
| AC Powerd | Yes |
| USB Version | 3.0 |
| Shipping | 24 - 48 hrs |
| Color | Prism Crush Silver |
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