Technical Details
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.
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.
| 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) | Yes |
| 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 Drive Slots | 2 |
| Compatible Drive Type* (See all supported drives) |
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| Maximum Internal Raw Capacity | 40 TB (10 TB drive x 4) (Capacity may vary by RAID types) |
| Maximum Raw Capacity with Expansion Units | 90 TB (10 TB drive x 9) (Capacity may vary by RAID types) |
| Maximum Single Volume Size | 108 TB |
| Hot Swappable Drive | Yes |
| Notes |
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| 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 |
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| External Drives |
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| 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 |
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| Brightness adjustable front LED indicators | Yes |
| Power Recovery | Yes |
| Noise Level* | 19.8 dB(A) |
| Scheduled Power On/Off | Yes |
| Wake on LAN/WAN | Yes |
| 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 | 5C to 40C (40F to 104F) |
| Storage Temperature | -20C to 60C (-5F to 140F) |
| Relative Humidity | 5% to 95% RH |
| Certification |
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| Warranty | 3 Years |
| 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 | Yes |
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| SSD Support | |
| SSD Read/Write Cache (White Paper) | Yes |
| SSD TRIM | Yes |
| 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 | Yes |
| NFS Kerberos Authentication | Yes |
| High Availability Manager | Yes |
| Log Center | Yes |
| Syslog Events per Second | 800 |
| Virtualization | |
| VMware vSphere 6 with VAAI | Yes |
| Windows Server 2012 | Yes |
| Windows Server 2012 R2 | Yes |
| Citrix Ready | Yes |
| OpenStack | Yes |
| Add-on Packages (learn more about the complete add-on package list) | |
| Antivirus by McAfee (Trial) | Yes |
| Central Management System | Yes |
| Chat | Yes |
| Maximum Users | 1500 |
| Notes |
|
| Cloud Station Server | Yes |
| 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 |
|
| Document Viewer | Yes |
| Download Station | Yes |
| Maximum Concurrent Download Tasks | 80 |
| exFAT Access (optional) | Yes |
| MailPlus / MailPlus Server | Yes |
| 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 |
|
| Media Server | Yes |
| DLNA Compliance | Yes |
| Office | Yes |
| Maximum Users | 200 |
| Maximum Simultaneous Editing Users | 80 |
| Notes |
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| Snapshot Replication | Yes |
| Maximum Snapshots per Shared Folder | 1024 |
| Maximum Snapshots of all Shared Folder | 65536 |
| Surveillance Station | Yes |
| Maximum IP cam (Licenses required) | 40 (including 2 Free License) (See All Supported IP Cameras) |
| Total FPS (H.264)* | 1200 FPS @ 720p (1280×720) 840 FPS @ 1080p (19201080) 400 FPS @ 3M (2048×1536) 300 FPS @ 5M (2591×1944) 180 FPS @ 4K (3840×2160) |
| Total FPS (MJPEG)* | 480 FPS @ 720p (1280×720) 400 FPS @ 1080p (19201080) 330 FPS @ 3M (2048×1536) 200 FPS @ 5M (2591×1944) |
| Total FPS (H.265)* | 1200 FPS @ 720p (1280×720) 1200 FPS @ 1080p (19201080) 600 FPS @ 3M (2048×1536) 400 FPS @ 5M (2591×1944) 300 FPS @ 4K (3840×2160) |
| 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 | Yes |
| 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 (19201080), H.264 (AVC)/H.265 (HEVC)/MPEG-2/VC-1 |
| VPN Server | Yes |
| Maximum Connections | 20 |
| Environment & Packaging | |
| Environment | RoHS Compliant |
| Packaging Content |
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| Optional Accessories |
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| General | |
| Networking Protocols |
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| Windows AD Domain Integration | Domain Users login via Samba/AFP/FTP/File Station |
| HDD Management |
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| Security |
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| Utilities | Synology Assistant |
| Supported Clients |
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| Supported Browsers |
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