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 GB DDR3 Memory Module Pre-installed 2 GB x 1 Total Memory Slots 2 Memory Expandable up to 6 GB (2 GB + 4 GB) Storage Drive Bay(s) 12 Maximum Drive Bays with Expansion Unit 24 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 120 TB (10 TB HDD x 12) (Capacity may vary by RAID types) Maximum Raw Capacity with Expansion Units 240 TB (10 TB HDD x 24) (Capacity may vary by RAID types) Maximum Single Volume Size 108 TB Hot Swappable Drive  External Ports USB 2.0 Port 2 USB 3.0 Port 2 Expansion Port 1 File System Internal Drives •Btrfs •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) 88 mm x 430 mm x 692 mm Weight 12.56 kg 13.24 kg (for RP model) Others RJ-45 1GbE LAN Port 4 (with Link Aggregation / Failover support) Wake on LAN/WAN  System Fan 80 mm x 80 mm x 4 pcs Fan Speed Mode •Full-Speed Mode •Cool Mode •Quiet Mode Easy Replacement System Fan  Wireless Support (dongle)  Power Recovery  Noise Level* 41.5 dB(A) 44.3 dB(A) (for RP model) Scheduled Power On/Off  Power Supply Unit / Adapter 500W 2 X 500W (for RP model) AC Input Power Voltage 100V to 240V AC Power Frequency 50/60 Hz, Single Phase Power Consumption* 70.58 W (Access) 39.11 W (HDD Hibernation) 83.26 W (Access, for RP model) 46.61 W (HDD Hibernation, for RP model) British Thermal Unit 240.99 BTU/hr (Access) 133.54 BTU/hr (HDD Hibernation) 284.29 BTU/hr (Access, for RP model) 159.15 BTU/hr (HDD Hibernation, for RP model) Redundant Power Supply (for xs+ and RP model)  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 A •CE Class A •BSMI Class A Warranty 3 Years Notes •Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s). •Noise Level Testing Environment: Fully loaded with Seagate 500GB ST9500325AS 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: 17.2 dB(A); Temperature: 23.6˚C; Humidity: 58.2%. 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 Windows Access Control List (ACL) Integration  NFS Kerberos Authentication  High Availability Manager  Log Center  Syslog Events per Second 800 Virtualization VMware vSphere 5 with VAAI  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 Docker DSM  Maximum Docker DSM Number (Licenses required) 10 (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 150 Maximum Server Performance 362,000 emails per day, approx. 11.7 GB 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 Compliance  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 FPS @ 720p (1280x720) 900 FPS @ 1080p (1920×1080) 320 FPS @ 3M (2048x1536) 270 FPS @ 5M (2591x1944) Total FPS (MJPEG)* 540 FPS @ 720p (1280x720) 200 FPS @ 1080p (1920×1080) 150 FPS @ 3M (2048x1536) 90 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 •Welcome Note X 1 •Accessory Pack X 1 •AC Power Cord X 1 •AC Power Cord X 2 (for RP model) Optional Accessories •Surveillance Device License Pack •4GB DDR3 RAM Module •Expansion Unit: RX1214/RX1214RP X 1 •Expansion Unit: RX1217/RX1217RP X 1 •VS360HD •Synology RKS1314 - Rail Kit Sliding