Synology DiskStation DS918+

Back it up or lose it

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DiskStation DS918+World Backup Day is slowly creeping up on us. This year we will be celebrating this holiday on March 31st. The whole point of this holiday is to raise awareness of the importance of “Data” in our lives and ways we can protect it. Here at Modders-Inc, we try to review different types of storage devices which help consumers to store and backup data based on their need. One of our close sponsors recently released a multi-disk Network Attached Storage device that offers not only capacity but also able to scale and deliver content quickly and efficiently to users. DiskStation DS918+ by Synology is an ideal solution for home or small businesses to store data as a primary point and a backup. In addition to backup features, DS918+ is capable of transcoding up to two channels of H265 and H264 videos at the same time. This high-speed storage server has enough power to run a small company share with numerous features like Media Server and Surveillance Station.

Review Sample Provided by: Synology
Product Name: Disk Station DS918+
Price at time of review: $ 549.99 USD MSRP
The product was given in exchange for work done to produce this review.

Packaging

Our sample came in a double cardboard box. Production packaging will vary for DS918+. The actual unit was securely held in thick plastic foam with accessory box. Accessory box included two Ethernet cables, a pair of plastic keys and one power supply brick. You really don’t need much to get started with DS918+.

DiskStation DS918+

The keys are for the units bays. It is possible to lock bays in place if needed.

Specifications

 

Hardware Specifications
CPU
CPU ModelIntel Celeron J3455
CPU Architecture64-bit
CPU FrequencyQuad Core 1.5 burst up to 2.3 GHz
Hardware Encryption Engine (AES-NI)Yes
Hardware Transcoding EngineH.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 Memory4 GB DDR3L
Memory Module Pre-installed4GB (1 x 4GB)
Total Memory Slots2
Memory Expandable up to8 GB (4 GB x 2)
Storage
Drive Bays4
Maximum Drive Bays with Expansion Unit9
M.2 NVMe Drive Slots2
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 Capacity48 TB (12 TB drive x 4) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units108 TB (48 TB + 12 TB drive x 5) (Capacity may vary by RAID types)
Maximum Single Volume Size108 TB
Hot Swappable DriveYes
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 Port2 (with Link Aggregation / Failover support)
USB 3.0 Port2
eSATA Port1
File System
Internal Drives
  • Btrfs
  • EXT4
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT*
NotesexFAT Access is purchased separately in Package Center.
Appearance
Size (Height x Width x Depth)166 mm x 199 mm x 223 mm
Weight2.28 kg
Others
System Fan92 mm x 92 mm x 2 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Brightness adjustable front LED indicatorsYes
Power RecoveryYes
Noise Level*19.8 dB(A)
Scheduled Power On/OffYes
Wake on LAN/WANYes
Power Supply Unit / Adapter100W
AC Input Power Voltage100V to 240V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*28.8 W (Access)
12.6 W (HDD Hibernation)
British Thermal Unit98.27 BTU/hr (Access)
42.99 BTU/hr (HDD Hibernation)
Environment Temperature
Operating Temperature5°C to 40°C (40°F to 104°F)
Storage Temperature-20°C to 60°C (-5°F to 140°F)
Relative Humidity5% to 95% RH
Certification
  • EAC
  • VCCI
  • CCC
  • RCM
  • KC
  • FCC
  • CE
  • BSMI
Warranty3 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 ( See more )
Storage Management
Maximum Internal Volume Number512
Maximum iSCSI Target Number32
Maximum iSCSI LUN256
iSCSI LUN Clone/Snapshot, Windows ODXYes
SSD Read/Write Cache (White Paper)Yes
SSD TRIMYes
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 Accounts2048
Maximum Local Groups256
Maximum Shared Folder512
Maximum Shared Folder Sync Tasks8
Maximum Concurrent CIFS/AFP/FTP Connections1000
Windows Access Control List (ACL) IntegrationYes
NFS Kerberos AuthenticationYes
High Availability ManagerYes
Log CenterYes
Syslog Events per Second800
Virtualization
VMware vSphere 6 with VAAIYes
Windows Server 2012Yes
Windows Server 2012 R2Yes
Citrix ReadyYes
OpenStackYes
Add-on Packages (learn more about the complete add-on package list)
Antivirus by McAfee (Trial)Yes
Central Management SystemYes
ChatYes
Maximum Users1500
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 ServerYes
Maximum Number of Concurrently Connected Devices1000
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 ViewerYes
Download StationYes
Maximum Concurrent Download Tasks80
DriveYes
Maximum Number of Synced Files500,000 / single file reaction time 362 ms
Maximum Number of Concurrent Connections for PC Clients450
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)Yes
MailPlus / MailPlus ServerYes
Free Email Accounts(Licenses required for additional accounts)
Recommended MailPlus Client NumberUp to 90 (Btrfs) / 90 (ext4)
Maximum Server Performance840,000 (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 ServerYes
DLNA ComplianceYes
MomentsYes
Facial recognitionYes
Subject recognitionYes
OfficeYes
Maximum Users1800
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 ReplicationYes
Maximum Snapshots per Shared Folder1024
Maximum Snapshots of all Shared Folder65536
Surveillance StationYes
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 (1920×1080)
550 FPS @ 3M (2048×1536)
300 FPS @ 5M (2591×1944)
180 FPS @ 4K (3840×2160)
Total FPS (H.265)*1200 FPS @ 720p (1280×720)
1200 FPS @ 1080p (1920×1080)
900 FPS @ 3M (2048×1536)
550 FPS @ 5M (2591×1944)
300 FPS @ 4K (3840×2160)
Total FPS (MJPEG)*720 FPS @ 720p (1280×720)
500 FPS @ 1080p (1920×1080)
330 FPS @ 3M (2048×1536)
200 FPS @ 5M (2591×1944)
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 StationYes
Video Transcoding4K Group 1 (See more)
Maximum Transcoding Channel Number2 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 ManagerYes
Maximum Virtual DSM Number (Licenses required)4 (including 1 Free License) (Learn more)
NotesVirtual Machine Manager is not supported on hosts running Synology High Availability.
VPN ServerYes
Maximum Connections20
Environment & Packaging
EnvironmentRoHS 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 DDR3 non-ECC SO-DIMM
  • Expansion Unit: DX517 X 1
  • VS360HD
  • VS960HD
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Alex Lusakhpuryan

Alex has been part of the media scene for about 10 years now. He has formed and operated a nonprofit review company "UMLan" and after its recent closure has joined Modders-Inc. An Sr IT Systems Engineer by day and media reviewer by night, Alex brings his expertise in networking and storage aspect of the technology as well as in overall knowledge of latest technologies.

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