Synology DiskStation DS1517

Form Factor: Tower
CPU: Annapurna Labs Alpine AL-314/32-bit/Quad Core 1.7 GHz
Memory: 2 GB/DDR3L
Drive Bays: 5 (HDD not included )
Maximum Drive Bays with Expansion Unit: 15 (Expansion Unit: DX517 X 2)
Hot swappable Drive: Yes
External Ports: RJ-45 1GbE LAN X 4; USB 3.0 X 2, eSATA X 2
Maximum IP cam (License required): 30 (including 2 Free License)
Warranty: 2 years

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Hardware Specifications
CPU
CPU Model	Annapurna Labs Alpine AL-314
CPU Architecture	32-bit
CPU Frequency	Quad Core 1.7 GHz
Hardware Encryption Engine
Memory
System Memory	2 GB DDR3L
Memory Module Pre-installed	2 GB x 1
Storage
Drive Bays	5
Maximum Drive Bays with Expansion Unit	15
Compatible Drive Type* (See all supported drives)	3.5" SATA HDD 2.5" SATA HDD 2.5" SATA SSD
Maximum Internal Raw Capacity	50 TB (10 TB drive x 5) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units	150 TB (10 TB drive x 15) (Capacity may vary by RAID types)
Maximum Single Volume Size	108 TB
Hot Swappable Drive
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.
External Ports
RJ-45 1GbE LAN Port	4 (with Link Aggregation / Failover support)
USB 3.0 Port	2
eSATA Port	2
File System
Internal Drives	EXT4
External Drives	EXT4 EXT3 FAT NTFS HFS+ exFAT*
Notes	exFAT Access is purchased separately in Package Center.
Appearance
Size (Height x Width x Depth)	157 mm x 248 mm x 233 mm
Weight	4.15 kg
Others
System Fan	80 mm x 80 mm x 2 pcs
Fan Speed Mode	Cool Mode Quiet Mode
Easy Replacement System Fan
Wireless Support (dongle)
Power Recovery
Noise Level*	22.4 dB(A)
Scheduled Power On/Off
Wake on LAN/WAN
Power Supply Unit / Adapter	200W
AC Input Power Voltage	100V to 240V AC
Power Frequency	50/60 Hz, Single Phase
Power Consumption*	39.5 W (Access) 18.2 W (HDD Hibernation)
British Thermal Unit	134.78 BTU/hr (Access) 62.10 BTU/hr (HDD Hibernation)
Environment Temperature
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
Certification	FCC Class B CE Class B BSMI Class B
Warranty	3 Year Hardware Warranty, Extendable to 5 Year Coverage - EW201
Notes	Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s). Noise Level Testing Environment: Fully loaded with Seagate 1TB ST31000520AS 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	256
Maximum iSCSI Target Number	32
Maximum iSCSI LUN	256
iSCSI LUN Clone/Snapshot, Windows ODX
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
SSD Support
SSD Read/Write Cache (White Paper)
SSD TRIM
File Sharing Capacity
Maximum Local User Accounts	2048
Maximum Local Groups	256
Maximum Shared Folder	256
Maximum Shared Folder Sync Tasks	4
Maximum Concurrent CIFS/AFP/FTP Connections	512
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
High Availability Manager
Log Center
Syslog Events per Second	400
Add-on Packages (learn more about the complete add-on package list)
Central Management System
Chat
Maximum Users	150
Notes	The number of concurrent HTTP connections for Chat was configured to the maximum. For tested models with expandable memory, the maximum amount of RAM was installed.
Cloud Station Server
Maximum Concurrent File Transfers	512
Download Station
Maximum Concurrent Download Tasks	50
exFAT Access (optional)
Media Server
DLNA Compliance
Office
Maximum Users	150
Maximum Simultaneous Editing Users	40
Notes	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
Surveillance Station
Maximum IP cam (Licenses required)	30 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264)*	900 FPS @ 720p (1280x720) 300 FPS @ 1080p (1920×1080) 200 FPS @ 3M (2048x1536) 150 FPS @ 5M (2591x1944)
Total FPS (MJPEG)*	250 FPS @ 720p (1280x720) 120 FPS @ 1080p (1920×1080) 100 FPS @ 3M (2048x1536) 80 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
Video Transcoding	Group 1 - Type 2 (See more)
Maximum Transcoding Channel Number	1 channel, 30 FPS @ 720p (1280x720), H.264 (AVC)/MPEG-4 Part 2 (XVID, DIVX5)/MPEG-2/VC-1
VPN Server
Maximum Connections	15
Environment & Packaging
Environment	RoHS Compliant
Packaging Content	Main Unit X 1 Welcome Note X 1 Accessory Pack X 1 AC Power Cord X 1 RJ-45 LAN Cable X 2
Optional Accessories	Surveillance Device License Pack Expansion Unit: DX517 X 2 VS360HD