All the space you will ever need

With 60 bays in a 4U rackmount enclosure and support for up to 300 drives after expansion, the Synology HD6500 is the ideal high-density storage solution for large-scale warm and cold storage applications such as full system backups, video post-production, and large surveillance deployments.


Expand to 300 drives with four RX6022sas expansion units


۶۴ GB DDR4 ECC, expandable to 512 GB


Over 6,688/6,662MB/s sequential read/write۱


۲ x 10-core Intel Xeon Silver

CPU Model Intel Xeon Silver 4210R
CPU Quantity ۲
CPU Architecture ۶۴-bit
CPU Frequency ۱۰-core 2.4 (base) / 3.2 (turbo) GHz
Hardware Encryption Engine (AES-NI)
System Memory ۶۴ GB DDR4 ECC RDIMM
Memory Module Pre-installed ۶۴ GB (32 GB x 2)
Total Memory Slots ۱۶
Maximum Memory Capacity ۵۱۲ GB (32 GB x 16)
  • Synology reserves the right to replace memory modules with the same or higher frequency based on supplier’s product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.
  • Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.
  • For more information about the recommended memory configurations, please check the Hardware Installation Guide of your Synology product.
Drive Bays ۶۰
Maximum Drive Bays with Expansion Unit ۳۰۰ (RX6022sas x 4)
SAS multipathing
Compatible Drive Type* (See all supported drives)
  • ۳.۵″ SAS HDD
  • ۲.۵″ SATA SSD (system drives)
Hot Swappable Drive
  • Synology only guarantees full functionality, reliability, and performance for Synology drives listed on the compatibility list. The use of non-validated components may limit certain functionality and result in data loss and system instability.
  • Two Synology 480GB SATA SSDs are included in the accessory pack.
External Ports
RJ-45 1GbE LAN Port ۲ (with Link Aggregation / Failover support)
RJ-45 10GbE LAN Port ۲ (with Link Aggregation / Failover support)
Management LAN Port ۱
Max. number of LAN ports ۱۵
USB 3.2 Gen 1 Port* ۲
Expansion Port ۲
  • The USB 3.0 standard was renamed to USB 3.2 Gen 1 by the USB Implementers Forum (USB-IF) in 2019.
  • Besides the 5 built-in LAN ports, up to 10 additional LAN ports can be made available by installing compatible network interface cards (sold separately).
PCIe Expansion
  • ۲ x Gen3 x16 slot (x16 link)
  • ۲ x Gen3 x8 slots (x8 link)
File System
Internal Drives
  • Btrfs
External Drives
  • Btrfs
  • EXT4
  • EXT3
  • FAT
  • NTFS
  • HFS+
  • exFAT
Notes exFAT Access can be installed for free from Package Center in DSM 7.0. In DSM 6.2 or earlier versions, exFAT Access needs to be purchased in Package Center.
Form Factor (RU) ۴U
Size (Height x Width x Depth) ۱۷۶ mm x 482 mm x 1020 mm
Weight ۳۷.۹ kg
Rack Installation Support* ۴-post 19″ rack (Synology Rail Kit – RKS-03)
System Fan ۸۰ mm x 80 mm x 4 pcs
Fan Speed Mode
  • Full-Speed Mode
  • Cool Mode
  • Quiet Mode
Easy Replacement System Fan
Power Recovery
Noise Level* ۶۰.۸ dB(A)
Scheduled Power On / Off
Wake on LAN / WAN
Power Supply Unit / Adapter ۱۶۰۰ W
Redundant Power Supply
AC Input Power Voltage ۲۰۰V to 240V AC
Power Frequency ۵۰/۶۰ Hz, Single Phase
Power Consumption* ۱۰۲۵.۲ W (Access)
۴۱۸ W (HDD Hibernation)
British Thermal Unit ۳۴۹۵.۹۳ BTU/hr (Access)
۱۴۲۵.۳۸ BTU/hr (HDD Hibernation)
  • Noise Level Testing Environment: Fully loaded with Synology HAS5300-8T hard drive(s) in the idle state. Two G.R.A.S. Type 40AE microphones, each set up 1 meter away from the Synology NAS at the front and rear. Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
  • Power consumption is measured when it is fully loaded with Synology 8TB HAS5300-8T hard drive(s).
Operating Temperature ۰°C to 35°C (32°F to 95°F)
Storage Temperature -۲۰°C to 60°C (-5°F to 140°F)
Relative Humidity ۵% to 95% RH
  • FCC
  • CE
  • BSMI
  • VCCI
  • RCM
  • UKCA
  • EAC
  • CCC
  • KC
  • UL
۵ Years
Notes The warranty period starts from the purchase date as stated on your purchase receipt. (Learn more)
RoHS Compliant
Packaging Content
  • Main Unit X 1
  • Synology 480GB SATA SSD X 2
  • Rail Kit Sliding: RKS-03 X 1
  • Accessory Pack X 1
  • AC Power Cord X 2
  • Quick Installation Guide X 1
Optional Accessories

Synology Assistant


Operating System(DSM)


Hardware Installation Guide




RackStation RS4021xs+

۱۶-PCI Express Expansion Slots

۱۷-SAS OUT Port (Primary)

۱۸-SAS OUT Port (secondary)

۱۹-Drive Trays

۲۰-Drive Status Indicators

۱۱-Reset Button

۱۲-۱GbE RJ-45 Ports

۱۳-۱۰GbE RJ-45 Ports

۱۴-Management Port

۱۵-USB 3.2 Gen 1 Ports

۶-System Drive Trays

۷-PSU Fans

۸-Power Port

۹-PSU Indicators

۱۰-Console Port

۱-Power Button and Indicator

۲-Status Indicator

۳-Alert Indicator

۴-Mute Button

۵-System Drive Status Indicators