| CPU | |
| CPU Model | Intel Atom C3538 |
| CPU Architecture | 64-bit |
| CPU Frequency | Quad Core 2.1 GHz |
| Hardware Encryption Engine (AES-NI) | Yes |
| Memory | |
| System Memory | 4GB DDR4 |
| Memory Module Pre-installed | 4GB (1 x 4GB) |
| Total Memory Slots | 2 |
| Memory Expandable up to | 32GB (16GB x 2) |
| Storage | |
| Drive Bays | 6 |
| Maximum Drive Bays with Expansion Unit | 16 |
| Compatible Drive Type* (See all supported drives) | 3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD |
| Maximum Internal Raw Capacity | 84TB (14TB drive x 6) (Capacity may vary by RAID types) |
| Maximum Raw Capacity with Expansion Units | 224TB (84TB + 14TB drive x 10) (Capacity may vary by RAID types) |
| Maximum Single Volume Size | 108TB |
| Hot Swappable Drive | Yes |
| Notes | 1. "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. 2. 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) 3. 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 | 4 (with Link Aggregation / Failover support) |
| USB 3.0 Port | 3 |
| eSATA Port | 2 |
| PCIe | |
| PCIe Expansion | 1 x Gen3 x8 slot (black, x4 link) |
| Add-in-card support | M2D17 - Dual M.2 SATA SSD adapter card for SSD cache M2D18 - Dual M.2 SATA/NVMe SSD adapter card for SSD cache PCIe Network Interface Card (Learn more) |
| Notes | DS1618+ with M2D17 can only support M.2 SATA SSD. M.2 NVMe/AHCI PCIe SSD is not supported. |
| 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 282 mm x 243 mm |
| Weight | 5.05 kg |
| 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 | Yes |
| Brightness adjustable front LED indicators | Yes |
| Power Recovery | Yes |
| Noise Level* | 23.7 dB(A) |
| Scheduled Power On/Off | Yes |
| Wake on LAN/WAN | Yes |
| Power Supply Unit / Adapter | 250W |
| AC Input Power Voltage | 100V to 240V AC |
| Power Frequency | 50/60 Hz, Single Phase |
| Power Consumption* | 56.86 W (Access) 25.76 W (System Hibernation) |
| British Thermal Unit | 194.01 BTU/hr (Access) 87.9 BTU/hr (System Hibernation) |
| Environment 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) |
| Relative Humidity | 5% to 95% RH |
| Certification | FCC CE BSMI EAC VCCI CCC RCM |
| Warranty | 3 Year Hardware Warranty |
| Notes | 1. Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s). 2. 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 Number | 512 |
| Maximum iSCSI Target Number | 128 |
| Maximum iSCSI LUN | 256 |
| iSCSI LUN Clone/Snapshot, Windows ODX | Yes |
| SSD Read/Write Cache (White Paper) | Yes |
| SSD TRIM | Yes |
| 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 RAID 6 JBOD |
| Global Hot Spare Supported RAID Type | Synology Hybrid RAID RAID 1 RAID 5 RAID 6 RAID 10 |
| 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 |
| Maximum Concurrent CIFS/AFP/FTP Connections (with RAM expansion) | 2000 |
| 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 2016 | 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 | 1. The number of concurrent HTTP connections for Chat was configured to the maximum. 2. CPU and RAM usage were both under 80% when the number of maximum users was reached. 3. For tested models with expandable memory, the maximum amount of RAM was installed. |
| Cloud Station Server | Yes |
| Maximum Number of Concurrently Connected Devices | 1000 |
| Maximum Number of Concurrently Connected Devices (with RAM expansion) | 2000 |
| Maximum Number of Hosted Files (btrfs) | 1,000,000 |
| Maximum Number of Hosted Files (ext4) | 1,000,000 |
| Notes | 1. The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time. 2. The maximum number of hosted files refers to the maximum number of files that can be indexed and hosted by the Cloud Station Server service. RAM expansion was not used during testing. 3. Non-encrypted shared folders were used during the aforementioned testing. |
| Document Viewer | Yes |
| Download Station | Yes |
| Maximum Concurrent Download Tasks | 80 |
| Drive | |
| Maximum Number of Hosted Files | 1,000,000 |
| Maximum Number of Concurrent Connections for PC Clients | 550 |
| Notes | 1. The Btrfs file system was used for the purpose of testing. 2. For tested models with expandable memory, the maximum amount of RAM was installed. |
| exFAT Access (optional) | Yes |
| MailPlus / MailPlus Server | Yes |
| Free Email Accounts | 5 (Licenses required for additional accounts) |
| Maximum number of concurrent users | Up to 150 |
| Maximum Server Performance | 1,484,000 emails per day, approx. 45GB |
| Notes | 1. The CPU and RAM usage were both under 80% when testing the maximum number of concurrent users. 2. For tested models with expandable memory, the maximum amount of RAM was installed. 3. Read-write SSD cache was enabled in 5-bay (and above) NAS models with 2 SSDs units installed. 4. The performance of the mail system will slightly decrease in high-availability mode due to data synchronization between the two servers. 5. 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 | Yes |
| DLNA Compliance | Yes |
| Moments | Yes |
| Facial recognition | Yes |
| Subject recognition | Yes |
| Office | Yes |
| Maximum Users | 1800 |
| Notes | 1. Multiple files were opened for testing and each file was edited by 30 users simultaneously. 2. CPU and RAM usage were both under 80% when the number of maximum users was reached. 3. For tested models with expandable memory, the maximum amount of RAM was installed. 4. Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM |
| Snapshot Replication | Yes |
| Maximum Snapshots per Shared Folder | 1024 |
| Maximum of system snapshots | 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 (1280x720) 960 FPS @ 1080p (1920×1080) 520 FPS @ 3M (2048x1536) 320 FPS @ 5M (2591x1944) 240 FPS @ 4K (3840x2160) |
| Total FPS (H.265)* | 1200 FPS @ 720p (1280x720) 1200 FPS @ 1080p (1920×1080) 880 FPS @ 3M (2048x1536) 520 FPS @ 5M (2591x1944) 400 FPS @ 4K (3840x2160) |
| Total FPS (MJPEG)* | 560 FPS @ 720p (1280x720) 270 FPS @ 1080p (1920×1080) 190 FPS @ 3M (2048x1536) 110 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 | Yes |
| Video Transcoding | Group 1 - Type 1 (See more) |
| Maximum Transcoding Channel Number | 1 channel, 30 FPS @ 1080p(1920×1080), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1 |
| Virtual Machine Manager | Yes |
| Recommended Virtual Machine Instances | 4 (Learn more) |
| Recommended Virtual DSM Number (Licenses required) | 4 (including 1 Free License) |
| Notes | 1. Virtual Machine Manager is not supported on hosts running Synology High Availability. 2. The specifications vary depending on system configuration and memory size. |
| VPN Server | Yes |
| Maximum Connections | 30 |
| Environment & Packaging | |
| Environment | RoHS Compliant |
| 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 | Surveillance Device License Pack D4NS2133-4G RAMEC2133DDR4SO-16G DDR4 ECC SO-DIMM Expansion Unit: DX517 X 2 VS360HD VS960HD Synology Ethernet Adapter E10G18-T1 Synology Ethernet Adapter E10G18-T2 Synology Ethernet Adapter E10G17-F2 Synology M2D18 M.2 SSD adapter card |
| Notes | Mixed usage of non-ECC and ECC UDIMMs is not supported. |
