CPU
CPU Model Intel Xeon D-1521
CPU Architecture 64-bit
CPU Frequency Quad Core 2.4GHz (base) / 2.7 (turbo) GHz
Hardware Encryption Engine (AES-NI) Yes
Memory
System Memory 8GB DDR4 ECC UDIMM
Memory Module Pre-installed 8GB (1 x 8GB)
Total Memory Slots 4
Memory Expandable up to 64GB (4 x 16GB)
Storage
Drive Bay(s) 12
Maximum Drive Bays with Expansion Unit 36
Compatible Drive Type (See all supported drives) 3.5" SATA III HDD
2.5" SATA III HDD
2.5" SATA III SSD
Maximum Internal Raw Capacity 120TB (10TB drive x 12) (Capacity may vary by RAID types)
Maximum Raw Capacity with Expansion Units 360TB (10TB drive x 36) (Capacity may vary by RAID types)
Maximum Single Volume Size 200TB (32GB RAM required, for RAID 5 or RAID 6 groups only)
108TB
Hot Swappable Drive Yes
External Ports
RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support)
USB 3.0 Port 2
Expansion Port 2
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) 88 mm x 430.5 mm x 692 mm
Weight 14.5 kg 
Others
Wake on LAN/WAN Yes
System Fan 80 mm x 80 mm x 4 pcs
Fan Speed Mode Full-Speed Mode
Cool Mode
Quiet Mode
Easy Replacement System Fan Yes
Power Recovery Yes
Noise Level* 50.2 dB(A)
Scheduled Power On/Off Yes
Power Supply Unit / Adapter 2 x 500W 
AC Input Power Voltage 100V to 240V AC
Power Frequency 50/60 Hz, Single Phase
Power Consumption* 116.42 W (Access)
65.49 W (HDD Hibernation)
British Thermal Unit 397.24 BTU/hr (Access)
223.46 BTU/hr (HDD Hibernation)
Redundant Power Supply (for xs+ and RP model) Yes
Environment Temperature
Operating Temperature 5°C to 35°C (40°F to 95°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
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%
Storage Management
Maximum Internal Volume Number 1024
Maximum iSCSI Target Number 64
Maximum iSCSI LUN 512
iSCSI LUN Clone/Snapshot, Windows ODX Yes
RAID Group Yes
Supported RAID Type RAID F1
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 RAID F1
RAID 1
RAID 5
RAID 6
Volume Expansion by Adding a HDD RAID F1
RAID 5
RAID 6
JBOD
Global Hot Spare Supported RAID Type RAID F1
RAID 1
RAID 5
RAID 6
RAID 10
SSD Support
SSD Read/Write Cache (White Paper) Yes
SSD TRIM Yes
File Sharing Capacity
Maximum User Accounts 16000
Maximum Groups 512
Maximum Shared Folder 512
Maximum Shared Folder Sync Tasks 16
Maximum Concurrent CIFS/AFP/FTP Connections 2048
Windows Access Control List (ACL) Integration Yes
NFS Kerberos Authentication Yes
High Availability Manager Yes
Log Center Yes
Syslog Events per Second 3000
Virtualization
VMware vSphere 6 with VAAI Yes
Windows Server 2012 Yes
Windows Server 2012 R2 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 1600
Notes The number of concurrent HTTP connections for Chat was configured to the maximum.
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.
Cloud Station Server Yes
Maximum Number of Concurrently Connected Devices 2000
Maximum Number of Concurrently Connected Devices (with RAM expansion) 10000
Maximum Number of Synced Files (btrfs) 3,000,000 / single file reaction time 530 ms
Maximum Number of Synced Files (ext4) 3,000,000 / single file reaction time 229 ms
Notes The maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time. For more information on file processing capability, please refer to the reaction time for file processing.
File reaction time refers to the preparation time required for other devices to start downloading a 1KByte file from a Synology NAS after the file has been added to the NAS. RAM expansion was not used during testing.
Non-encrypted shared folders were used during the aforementioned testing.
DDSM Yes
Maximum DDSM Number (Licenses required) 35 (including 1 Free License) (Learn more)
Document Viewer Yes
Download Station Yes
Maximum Concurrent Download Tasks 80
exFAT Access (optional) Yes
MailPlus / MailPlus Server Yes
Free Email Accounts 5 (Licenses required for additional accounts)
Recommended MailPlus Client Number Up to 400 (Btrfs) / 450 (EXT4)
Maximum Server Performance 2,621,000 (Btrfs) / 2,412,000 (EXT4) emails per day, approx. 80 GB (Btrfs) / 73.6 GB (EXT4)
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 Yes
DLNA Compliance Yes
Office Yes
Maximum Users 1600
Maximum Simultaneous Editing Users 100
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
PetaSpace Yes
Snapshot Replication Yes
Maximum Snapshots per Shared Folder 1024
Maximum Snapshots of all Shared Folder 65536
Surveillance Station Yes
Maximum IP cam (Licenses required) 75 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264)* 2250 FPS @ 720p (1280x720)
900 FPS @ 1080p (1920×1080)
500 FPS @ 3M (2048x1536)
300 FPS @ 5M (2591x1944)
Total FPS (MJPEG)* 750 FPS @ 720p (1280x720)
375 FPS @ 1080p (1920×1080)
250 FPS @ 3M (2048x1536)
180 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.
Environment & Packaging
Environment RoHS Compliant
Packaging Content Main Unit x 1
Accessory Pack x 1
AC Power Cord x 2
Quick Installation Guide x 1
Optional Accessories Surveillance Device License Pack
8GB DDR4 ECC UDIMM
16GB DDR4 ECC UDIMM
Expansion Unit:
RX1217/RX1217RP X 2
VS360HD
Synology RKS1317 - Rail Kit Sliding
Synology Ethernet Adapter E10G15-F1
Synology Ethernet Adapter E10G17-F2

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