Synology 16 Bay RackStation RS4017xs Storage

CPU :
CPU Model : Intel Xeon D-1541 
CPU Architecture : 64-bit 
CPU Frequency : 8-Core 2.1 (base) / 2.7 (turbo) GHz 
Hardware Encryption Engine (AES-NI) : Yes

Memory :
System Memory : 8 GB DDR4 ECC UDIMM 
Memory Module Pre-installed : 8 GB (8 GB x 1) 
Total Memory Slots : 4 
Memory Expandable up to : 64 GB (16 GB x 4) 

Storage :
Drive Bays : 16 
Maximum Drive Bays with Expansion Unit : 40 
Compatible Drive Type* (See all supported drives) :
3.5" SATA HDD
2.5" SATA HDD 
2.5" SATA SSD

Maximum Internal Raw Capacity : 256 TB (16 TB drive x 16) (Capacity may vary by RAID types) 
Maximum Raw Capacity with Expansion Units :  640 TB (256 TB + 16 TB drive x 24) (Capacity may vary by RAID types) 
Maximum Single Volume Size* :
200 TB (32 GB RAM required, for RAID 5 or RAID 6 groups only)
108 TB

Hot Swappable Drive : Yes

External Ports :
RJ-45 1GbE LAN Port : 4 (with Link Aggregation / Failover support) 
RJ-45 10GbE LAN Port : 2 (with Link Aggregation / Failover support) 
USB 3.0 Port : 2 
Expansion Port : 2 

PCIe :
PCIe Expansion : 2 x Gen3 x8 slots (x8 link) 
Add-In-Card Support : PCIe Network Interface Card (Learn more) 
M2D18 - Dual M.2 SATA SSD adapter card for SSD cache
Notes : RS4017xs+ with M2D18 can only support M.2 SATA SSD. M.2 NVMe/AHCI PCIe SSD is not supported. 

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 :
Form Factor (RU) : 3U 
Size (Height x Width x Depth) : 132.3 mm x 482 mm x 656.5 mm 
Weight : 17.4 kg 
Rack Installation Support* : 4-post 19" rack (Synology Rail Kit - RKS1317) 
Notes : The rail kit is sold separately 

Others : 
System Fan : 80 mm x 80 mm x 3 pcs 
Fan Speed Mode :
Full-Speed Mode
Cool Mode
Quiet Mode
Easy Replacement System Fan : Yes
Power Recovery : Yes
Noise Level* : 44.7 dB(A) 
Scheduled Power On / Off : Yes
Wake on LAN / WAN : Yes
Power Supply Unit / Adapter : 800 W 
Redundant Power Supply : Yes
AC Input Power Voltage : 100 V to 240 V AC 
Power Frequency : 50/60 Hz, Single Phase 
Power Consumption* :
136.4 W (Access) 
69.2 W (HDD Hibernation) 

British Thermal Unit :
465.7 BTU/hr (Access) 
236.3 BTU/hr (HDD Hibernation) 

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 

Warranty : 5 Years