Synology DS1517+

Form Factor: Tower
CPU: Intel Atom C2538/64-bit/Quad Core 2.4 GHz
Memory: 2GB (1 x 2GB) / 8GB (2 x 4GB)/DDR3L (Expandable: 16 GB (8 GB x 2))
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 4, eSATA Port X 2
PCIe Expansion: 1 x Gen2 x8 slot (x4 link)
Add-in-card support: M2D17 - Dual M.2 SSD adapter card for SSD cache; PCIe Network Interface Card
Maximum IP cam (License required): 40 (including 2 Free License)
Warranty: 3 years

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Hardware Specifications
CPU
CPU Model	Intel Atom C2538
CPU Architecture	64-bit
CPU Frequency	Quad Core 2.4 GHz
Hardware Encryption Engine (AES-NI)
Memory
System Memory	2 / 8 GB DDR3
Memory Module Pre-installed	2GB (1 x 2GB) / 8GB (2 x 4GB)
Total Memory Slots	2
Memory Expandable up to	16 GB (8 GB x 2)
Storage
Drive Bays	5
Maximum Drive Bays with Expansion Unit	15
Compatible Drive Type* (See all supported drives)	3.5" SATA III / SATA II HDD 2.5" SATA III / SATA II HDD 2.5" SATA III / SATA II SSD
Maximum Internal Raw Capacity	50 TB (10 TB HDD x 5) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units	150 TB (10 TB HDD 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. For the optimal SSD cache performance, please see here. 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	4
eSATA Port	2
PCIe
PCIe Expansion	1 x Gen2 x8 slot (x4 link)
Add-in-card support	M2D17 - Dual M.2 SSD adapter card for SSD cache PCIe Network Interface Card (Learn more)
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 250 mm x 243 mm
Weight	4.46 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)
Brightness adjustable front LED indicators
Power Recovery
Noise Level*	26.2 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*	42.1 W (Access) 23.1 W (HDD Hibernation)
British Thermal Unit	143.7 BTU/hr (Access) 78.9 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 Years
Applicable Extended Warranty	EW201 - 2 Year Extension
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 Number	512
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	512
Maximum Shared Folder Sync Tasks	8
Maximum Concurrent CIFS/AFP/FTP Connections	512(2GB) / 2048(8GB)
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
High Availability Manager
Log Center
Syslog Events per Second	800
Virtualization
VMware vSphere 6 with VAAI
Windows Server 2012
Windows Server 2012 R2
Citrix Ready
OpenStack
Add-on Packages (learn more about the complete add-on package list)
Antivirus by McAfee (Trial)
Central Management System
Chat
Maximum Users	400
Notes	The number of concurrent HTTP connections for Chat was configured to the maximum. CPU and RAM usage were both under 80% when testing the recommended number of clients. For tested models with expandable memory, the maximum amount of RAM was installed.
Cloud Station Server
Maximum Concurrent File Transfers	512 (2GB) / 2000 (8GB)
Maximum Concurrent File Transfers (with RAM expansion)	6000
DDSM
Maximum DDSM Number (Licenses required)	30 (including 1 Free License) (Learn more)
Document Viewer
Download Station
Maximum Concurrent Download Tasks	80
exFAT Access (optional)
HiDrive Backup
MailPlus / MailPlus Server
Free Email Accounts	5 (Licenses required for additional accounts)
Recommended MailPlus Client Number	Up to 90
Maximum Server Performance	712,000 emails per day, approx. 21.73GB
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 Server
DLNA Certification
Office
Maximum Users	400
Maximum Simultaneous Editing Users	80
Notes	CPU and RAM usage were both under 80% when testing the recommended number of clients. 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 Replication
Maximum Snapshots per Shared Folder	1024
Maximum Snapshots of all Shared Folder	65536
Surveillance Station
Maximum IP cam (Licenses required)	40 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264)*	1200 (2GB RAM) / 1200 (8GB RAM) FPS @ 720p (1280x720) 900 (2GB RAM) / 1080 (8GB RAM) FPS @ 1080p (1920×1080) 320 (2GB RAM) / 480 (8GB RAM) FPS @ 3M (2048x1536) 270 (2GB RAM) / 280 (8GB RAM) FPS @ 5M (2591x1944)
Total FPS (MJPEG)*	540 (2GB RAM) / 760 (8GB RAM) FPS @ 720p (1280x720) 200 (2GB RAM) / 400 (8GB RAM) FPS @ 1080p (1920×1080) 150 (2GB RAM) / 280 (8GB RAM) FPS @ 3M (2048x1536) 90 (2GB RAM) / 200 (8GB RAM) 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 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
VPN Server
Maximum Connections	20
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 8GB (4GB x 2) DDR3 RAM Module Kit 16GB (8GB x 2) DDR3 RAM Module Kit Expansion Unit: DX517 X 2 VS360HD Synology Ethernet Adapter E10G15-F1 Synology Ethernet Adapter E10G17-F2 Synology M2D17 M.2 SSD adapter card