| Technical Specifications |
| CPU | Intel Atom C2538 Quad Core 2.4GHz |
| Hardware encryption engine | Yes (AES-NI) |
| Memory | 2 GB DDR3 SO-DIMM (expandable up to 16 GB) |
| Compatible drive type | • 5 x 3.5" or 2.5" SATA SSD / HDD (drives not included)
• 2 x M.2 2280/2260/2242 SATA SSD3 (drives not included) |
| External ports | • 4 x USB 3.0 ports
• 2 x expansion ports |
| Size (HxWxD) | 166 x 282 x 243 mm |
| Weight | 5.2 kg |
| LAN | 4 x 1GbE (RJ45) |
| Wake on LAN/WAN | Yes |
| PCIe 3.0 slot | • 1 x 8-lane x 8 slot
• 10GbE network interface cards support
• M.2 SATA and NVMe SSD adapter card support |
| Scheduled power on / of | Yes |
| System fan | 2 (95 x 95 x 25 mm) |
| AC input power voltage | 100V to 240V AC |
| Power frequency | 50 / 60Hz, single phase |
| 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 |
| Maximum operating altitude | 3,048 m (10,000 ft) |
| General | |
| Networking protocol | CIFS, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN ™ , L2TP) |
| File system | • Internal: Btrfs, ext4
• External: Btrfs, ext4, ext3, FAT, NTFS, HFS+, exFAT4 |
| Storage management | • Maximum single volume size: 108TB
• Maximum internal volumes: 512
• Maximum iSCSI target: 32
• Maximum iSCSI LUN: 256
• iSCSI LUN clone / snapshot support |
| Supported RAID type | Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10 |
| File sharing capability | • Maximum local user account: 2,048
• Maximum local group: 256
• Maximum shared folder: 512
• Maximum concurrent CIFS / AFP / FTP connection: 512 (2GB) / 2,048 (8GB) |
| Privilege | Windows Access Control List (ACL) |
| Virtualization | VMware vSphere® 6, Microsoft Hyper-V® , Citrix®, OpenStack® |
| Directory service | Windows® AD integration: Domain users login via Samba (CIFS) / AFP / FTP / File Station, LDAP integration |
| Security | FTP over SSL / TLS, IP auto-block, firewall, encrypted network backup over Rsync, HTTPS connection |
| Utilities | Synology Web Assistant, Cloud Station Drive, Cloud Station Backup, Cloud Sync Decryption Tool, Surveillance Station Client, Evidence Integrity Authenticator, Photo Station Uploader, Snapshot Manager for VMware, Snapshot Manager for Windows, NFS Plug-in for VMware VAAI |
| Supported clients | Windows 7 onwards, Mac OS X® 10.10 onwards |
| Supported browsers | Chrome®, Firefox®, Internet Explorer® 9 onwards, Safari® 8 onwards; Safari (iOS 7 onwards), Chrome (Android™ 4.0 onwards) on tablets |
| Applications | |
| File Station | Virtual drive, remote folder, Windows ACL editor, compressing / extracting archived files, bandwidth control for specific users or groups, creating sharing links, transfer logs |
| Backup solutions | Network backup; local backup; desktop backup; configuration backup; OS X Time Machine; backup data to public cloud; shared folder sync - maximum task number: 8 |
| FTP Server | Bandwidth control for TCP connections, custom FTP passive port range, anonymous FTP, FTP SSL / TLS and SFTP protocol, boot over the network with TFTP and PXE support, transfer logs |
| Security Advisor | Malware detection / removal; user account / password, network, system-related security scan |
| iOS / Android™ applications | DS cloud, DS file, DS finder, DS cam, DS note, MailPlus |
| Windows Phone® applications | DS file, DS finder |
| Add-on Packages | |
| Antivirus Essential | Full system scan, scheduled scan, white list customization, virus definition auto update |
| Cloud Station Server | Maximum concurrent file transfers: 512 (2GB) / 2,000 (8GB), retain historical and deleted file versions |
| Cloud Sync | One or two-way synchronization with public cloud storage providers including Amazon Cloud Drive, Amazon S3-compatible storage, Baiduyun, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, Megafon Disk, Microsoft OneDrive, OpenStack Swift-compatible storage, WebDAV servers, Yandex Disk |
| Log Center | SSL connection, log rotation: 6 months, 1 year, 2 years, 3 years, email notification |
| MailPlus | Intuitive webmail interface for MailPlus Server; customizable mail labels, filters, and user interface |
| MailPlus Server | Secure, reliable, and private mail solution with High-availability, load balancing, security and filtering design (Includes 5 free email account licenses; additional accounts require the purchasing of additional licenses) |
| Note Station | Rich-text note organization and versioning, encryption, sharing, media embedding and attachments |
| Storage Analyzer | Volume and quota usage, total size of files, volume usage and trends based on past usage, size of shared folders, largest / most / least frequently modified files |
| Surveillance Station | Maximum IP camera: 40 (total of 1,200 FPS at 720p, H.264) (Includes two free camera licenses; additional cameras require the purchasing of additional licenses) |
| VPN Server | Maximum connections: 20; supported VPN protocol: PPTP, OpenVPN™, L2TP |
| Web Station | Virtual host (up to 30 websites), PHP / MariaDB®, 3rd-party applications support |
| Other packages | Photo Station, Audio Station, iTunes® Server, additional 3rd-party packages are available on Package Center |
| Environment and Packaging | |
| Environment safety | RoHS compliant |
| Package content | • DS1517+ main unit x 1
• Quick Installation Guide x 1
• Accessory pack x 1
• AC power cord x 1
• RJ-45 LAN cable x 2 |
| Optional accessories | • 16 GB (8 GB x 2) DDR3 SO-DIMM kit (RAM1600DDR3L-8GBx2)
• 8 GB (4 GB x 2) DDR3 SO-DIMM kit (RAM1600DDR3L-4GBx2)
• Synology E10G17-F2 / E10G15-F1 10Gbps Ethernet adapters
• Synology M2D17 M.2 SSD adapter card
• Synology Expansion Unit DX517
• Synology VS360HD
• Surveillance Device License Pack |
| Warranty | 3 years |
