QNAP 

ES1686dc-2123IT-64G-US QNAP 16 Bay Active Active Dual

Mfg Part Number:  ES1686dc-2123IT-64G-US  
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Price: $14,087.23 + Free Shipping
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Last Updated: Feb 13, 2026
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Next-generation Enterprise ZFS NAS: High-performance and near-zero downtime high availability

Delivering enterprise high availability, the ES1686dc Enterprise ZFS NAS features Intel® Xeon® D processors, dual active controllers, up to 512 GB DDR4 ECC memory, SAS 12Gb/s, and ZFS that supports logical volume management. The ES1686dc runs the latest QES 2.1.0 operating system that supports near-limitless snapshots, SnapSync, block-level data deduplication, and inline data compression. Whether being used as a mission-critical file server, virtualization server, VDI, medium-sized data center, video streaming, surveillance storage, and efficient file backup & recovery, the ES1686dc helps your business to achieve service-level agreements for performance and uptime.

  • Intel® Xeon® D dual active-active controllers provide supreme uptime and redundancy to ensure high availability.

  • Battery-protected DRAM write to cache data protection and Flash read acceleration provides industry-leading random access performance.

  • Two M.2 SSD slots allow for implementing SSD cache acceleration.

  • Four 10GbE SFP+ ports accelerate virtualization, large file sharing, and intensive data transfer.

  • Near-limitless snapshots and SnapSync for snapshot remote backup assist businesses to resume essential services in the shortest time.

  • Supports VMware® vSphere® 6.5, Windows Server® 2016 and Citrix® XenServer® 7.0 for storage virtualization. Compatible with OpenStack® cloud environments.

Active-Active high availability with optimal storage efficiency

In Active-Active storage system architecture, both controllers are able to provide a complete range of services, which is different from the Active-Standby architecture of single-controller systems. The Active-Active architecture does not have the disadvantage of idle computing resources. To leverage the strengths of the ES1686dc Active-Active controller architecture, it is recommended to create multiple storage pools and distribute their ownership between both controllers. This allows simultaneous output from both controllers for better load balancing.

Active-Standby single-controller system

With two HA systems you are paying twice the price and causing a load imbalance as workloads are only processed on the active system. A power outage could cause data loss, and the disconnected network invalidates the HA architecture.

Active-Active dual-controller system

Both controllers of the ES1686dc can carry traffic, along with Copy-To-Flash protection against power failure and the dual-path SAS interface. Besides conserving computing resources, a high-speed, uninterrupted, and high-availability storage service is also provided through communication protocols such as SMB, NFS and iSCSI.

Intel® Xeon® D dual-controller ensures high availability and failure-resistant service

Powered by two Intel® Xeon® D processors, the ES1686dc features a dual active-active controller architecture that provides failover/failback operations as the standby controller can quickly take over if one controller breaks down. Redundant hot-swappable power supplies and cooling fans are also included to provide businesses with near-zero downtime high availability. The ES1686dc connects to the JBOD enclosure (EJ1600 v2) via the dual-path mini-SAS design to sustain continuous operations even if a JBOD cable is disconnected. Designed around redundancy, the ES1686dc is the best realization of reliable enterprise storage for uninterrupted mission-critical enterprise tasks and productivity.

Main Specification
General Information
Manufacturer QNAP Systems
Manufacturer Part Number ES1686DC-2123IT-64G-US
Manufacturer Website Address http://www.qnap.com
Brand Name QNAP
Product Model ES1686dc-2123IT-64G
Product Name ES1686dc-2123IT-64G SAN/NAS Storage System
Product Type SAN/NAS Storage System
Storage
Number of Hard Drives Supported 16
Number of Hard Drives Installed No
Number of Solid State Drive Supported 16
Number of Solid State Drive Installed No
Flash Memory Capacity 4 GB
Processor & Chipset
Number of Processors Installed 2
Processor Type Xeon
Processor Model D-2123IT
Processor Core Quad-core (4 Core)
Processor Speed 2.20 GHz
Memory
Standard Memory 64 GB
Memory Technology DDR4 SDRAM
Network & Communication
Ethernet Technology 10 Gigabit Ethernet
I/O Expansions
Number of Total Expansion Bays 16
Number of 2.5"/3.5" Bays 16
Total Number of Expansion Slots 10
Expansion Slot Type SFP+
Expansion Slot Type PCI Express 3.0 x8
Controllers
Number of Controllers 2
Controller Type 12Gb/s SAS
RAID Supported Yes
RAID Levels 0, 1, 5, 6, 10, 50, 60, RAID-TP
Interfaces/Ports
Total Number of USB Ports 4
Number of USB 3.0 Ports 4
Network (RJ-45) Yes
Number of Network (RJ-45) Ports 6
Software
Operating System QES
Management & Protocols
Protocols HTTPS
Protocols IPv6
Protocols RSync
Protocols TCP/IP
Protocols SMSC
Protocols NFSv4
Protocols LACP
Protocols FTPS
Protocols Bonjour
Protocols SSL
Protocols iSCSI
Protocols SSH
Protocols IPv4
Protocols NFS
Protocols FXP
Protocols CIFS
Protocols SMB 3.0
Protocols TLS
Protocols SMB 2.0
Protocols NFSv3
Protocols LDAP
Protocols SMTP
Protocols TFTP
Protocols SMB
Protocols FTP
Protocols SNMP
Protocols HTTP
Power Description
Number of Power Supplies Installed 2
Maximum Power Supply Wattage 770 W
Redundant Power Supply Yes
Physical Characteristics
Height 5.2"
Width 19"
Depth 24.8"
Form Factor Rack-mountable
Rack Height 3U
Weight (Approximate) 56.95 lb
Miscellaneous
Package Contents
  • ES1686dc-2123IT-64G SAN/NAS Storage System
  • 6 x Ethernet Cables (1GbE)
  • 2 x Power Cords
  • 64 x Flat Head Screws (for 3.5" HDD)
  • 64 x Flat Head Screws (for 2.5" HDD)
  • E02 Series (Chassis) Rail Kit
  • 1 x Console Cable (RJ11 to RS-232)
  • Quick Installation Guide (QIG)
Country of Origin Taiwan
Warranty
Limited Warranty 5 Year

Mounting Kits

RAM Modules

WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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