From the Manufacturer
https://www.synology.com/en-global/products/DS1517+
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Mfr Part Number: DS1517+ (8GB)
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Hardware:
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CPU: Intel Atom C2538 (2.4 GHz, Quad Core), w/ Hardware Encryption Engine (AES-NI)
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Memory: 8GB DDR3
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Drive Bays: 5x 3.5" or 2.5" SATA3/SATA2 HDD/SSD
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Maximum Internal Raw Capacity: 50 TB (10 TB HDD x 5) (Capacity may vary by RAID types)
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External Ports: 4x RJ45 1GbE LAN Ports, 4x USB 3.0 Ports, 2x eSATA Ports
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PCIe: 1x Gen2 x8 slot (x4 link)
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Fan: 2x (80 x 80mm) Fans
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Noise Level: 26.2 dB(A)
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Power Recovery
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Scheduled Power On/Off
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Wake on LAN/WAN
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Power Supply Unit / Adapter: 200W
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AC Input Power Voltage: 100V to 240V AC
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Power Frequency: 50/60 Hz, Single Phase
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Networking Protocols: CIFS, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN)
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Security: FTP over SSL/TLS, IP Auto-Block, Firewall, Encrypted Network Backup over Rsync, HTTPS Connection
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File System:
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Internal Drives: Btrfs, EXT4
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External Drives: Btrfs, EXT4, EXT3, FAT, NTFS, HFS+, exFAT
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File Sharing:
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Maximum Local User Accounts: 2048
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Maximum Local Groups: 256
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Maximum Shared Folder: 512
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Maximum Shared Folder Sync Tasks: 8
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Maximum Concurrent CIFS/AFP/FTP Connections: 2048
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Windows Access Control List (ACL) Integration
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NFS Kerberos Authentication
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Utilities: Synology Assistant
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Applications:
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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
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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
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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
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Security Advisor: Malware detection / removal; user account / password, network, system-related security scan
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iOS / Android applications: DS cloud, DS file, DS finder, DS cam, DS note, MailPlus
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Windows Phone applications: DS file, DS finde
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Supported Clients: Windows 7 or above, Mac OS X 10.10 or above
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Power Consumption: 42.1 W (Access), 23.1 W (HDD Hibernation)
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Certifications: FCC Class B, CE Class B, BSMI Class B
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Dimensions (WxDxH): 250.0 x 243.0 x 166.0 mm
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Weight: 4.46 kg
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Package Contents: Main Unit, Accessory Pack, AC Power Cord, 2x RJ-45 LAN Cable, Quick Installation Guide