XCubeNXT 8100 Series

Enterprise Unified Storage in Simplicity

The XCubeNXT 8100 series is an enterprise-level, dual-active storage system with full redundancy.

Multiple protocol support and cross-QSAN platform replication combined with excellent scale-up capabilities make it the primary choice for mission-critical data centers, containerization, virtualization, or media environments.

Plus, backed by a 5-year limited warranty for proven enterprise-grade reliability.​

Available Models





“Set and Forget” Data Services

The XCubeNXT 8100 series is an enterprise-level, dual-active storage system with full redundancy.

An all-in-one storage solution that supports multiple protocols and cross-QSAN platform replication, its superb scale-up capabilities make it the primary choice for virtualization and surveillance deployment.

With QSM’s intuitive GUI and simplified storage management, setup, and data access can be accomplished in just 5 minutes.

Dependable Data Experience – High Availability and Enterprise Reliability

QSM continuously evolves our security level to protect data across storage and adhere to industry best practices. Crafted with excellence, our XCubeNXT has a 99.9999% high availability design with no single point of failure.

Flexible Expansion – Flexible I/O Modules and Scale-up Capacity as Needed

Each XN8100 controller has two host card slots that can be configured as iSCSI, Fibre Channel, or a mix of both besides built-in 4-port 10GbE iSCSI. As a result, the series offers great flexibility with built-in 8-port 10 GbE iSCSI and up to 26 host ports in a dual-controller system.

In addition, the system provides massive scale-up capabilities by connecting XCubeDAS or 3rd-party expansion units, which can be expanded according to your needs.

Simplify, Secure, and Streamline Workflows

QSAN XN8100 Series is a simple, secure, scalable, and high-performance unified storage system for enterprises. The foundation for customers with enterprise or private cloud needs, scale up with heavy-duty storage, and experience minimal downtime with newfound efficiency. Simplify and streamline high-volume data management workflows with the newest generation of unified storage and protect your data with multi-level security.


Brand new QSM 4 breaks boundaries by enabling unification and interoperability of XEVO and QSM platforms for replication, establishing the foundation, and enhancing performance for all QSAN platforms.

Secure Data and Secure Management

QSM continuously evolves our security level to protect data across storage and adhere to industry best practices. Supporting SED (Self-Encrypting Drives) coupled with WORM will keep your sensitive data safe even if the drives are lost, stolen, or misplaced.

Additionally, Windows ACL (Access Control List) and RBAC (Role-Based Access Control) help to prevent unauthorized access to your data.

High Availability and Enterprise Reliability

The XCubeNXT series is a proven high-availability unified storage system with full redundancy.

Its dual-active architecture and cache-to-flash technology ensure optimal performance and resilience in critical situations.










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.

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

4 x 10GbE SFP+ ports

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

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

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

2 x PCIe Gen 3 slots
PCIe expandability allows for 10GbE/25GbE adapters to increase application performance.

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

Available Models


Intel® Xeon® D-2123IT 4-core 2.20 GHz processor (burst up to 3.0 GHz) per controller, 32 GB RDIMM DDR4 ECC (4x 8 GB) per controller


Intel® Xeon® D-2145NT 8-core 1.90 GHz processor (burst up to 3.0 GHz) per controller, 48 GB RDIMM DDR4 ECC (4 x 4 GB+4 x 8GB) per controller


Intel® Xeon® D-2145NT 8-core 1.90 GHz processor (burst up to 3.0 GHz) per controller, 64 GB RDIMM DDR4 ECC (4 x 16 GB) per controller


Intel® Xeon® D-2142IT 8-core 1.90 GHz processor (burst up to 3.0 GHz) per controller, 48 GB RDIMM DDR4 ECC (4 x 4 GB+4 x 8GB) per controller


Intel® Xeon® D-2142IT 8-core 1.90 GHz processor (burst up to 3.0 GHz) per controller, 64 GB RDIMM DDR4 ECC (4 x 16 GB) per controller

Active-Active high availability with optimal storage efficiency

In Active-Active storage system architecture, both controllers can 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-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.

High performance. High efficiency.

SMB Sequential Throughout (10 GbE x 8) – Write 2201 MB/S – Read 5773 MB/S

iSCSI Random 4K IOPS(10 GbE x 8) – Write – 178552 IOPS – Read – 254828 IOPS

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 and high availability.

The ES1686dc connects to the JBOD enclosure (TL-R1620Sdc) 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.

Multi-level cache technology with both read and write

The ES1686dc simultaneously supports the main memory read cache (L1 ARC), SSD secondary read cache (L2 ARC), and memory write cache (ZFS Intent Log) to meet performance demands for various enterprise applications.

Up to 512 GB main memory

Each controller has eight RDIMM slots, allowing for up to 512 GB of memory. Note: The main memory will retain 8GB for use by the write cache.

NVRAM cache reduces the risk of losing write cache data
If unplanned power outages occur, the system can write cache data from the battery-protected DRAM to M.2 SSD through Copy To Flash (C2F) to ensure that data is not lost.

Note: To ensure write cache data safety, it is recommended to annually replace the BBU. QNAP provides a one-year warranty for the BBU.

PCIe expansion for 25GbE high-speed networks

The ES1686dc provides two PCIe Gen3 x8 slots connected to the CPU, allowing you to install lightning-fast 10GbE/25GbE network cards to boost virtualization, media streaming, and other bandwidth-demanding applications.

Installing NVIDIA® Mellanox Smart NICs further adds support for iSER for improved VMware® virtualization performance.

You can also install a SAS expansion card (QXP-820S-B3408) for connecting up to seven 16-bay TL-R1620Sdc expansion enclosures to seamlessly expand the potential storage capacity over 1PB, with unprecedented performance of up to 48Gbps per host connection.

Dual controller NAS: High reliability and high availability

“Reliability” is the priority for mission-critical business applications. The ES1686dc adopts dual active-active controllers to provide the most reliable base for business IT storage.

Product Features

3x hot-swappable system fans
The fan’s rotation speed will automatically adjust to the NAS temperature.

Intel® Xeon® D-2100 series processor
Provides Intel® Xeon® D-2142IT and Intel® Xeon® D-2123IT options with DDR4 memory and PCIe Gen3 support.

DDR4 2133 MHz ECC memory
Quad-channel DDR4 ECC memory with 8 RDIMM slots for up to 512 GB of memory per controller.

2x PCIe Gen3 x8 slots
Supports 10GbE/ 25GbE network cards or SAS expansion cards for greater application potential.

4x 10GbE SFP+ ports

Ideal for running bandwidth-demanding applications such as virtualization and fast backup/restoration.

Battery Backup Unit (BBU)

If a sudden power loss occurs, the BBU enables write-to-cache data protection, and at the same time the data is replicated to a backup controller to achieve 100% data integrity.

3x Gigabit ports
Supports Service Binding, Port Trunking, and MPIO. One Gigabit LAN port is dedicated to remote management.

QES 2.1.0: ZFS-based, and optimized for all flash performance

The ES1686dc features the QES (QNAP Enterprise Storage) 2.1.0 operating system, which is based on the simple and efficient FreeBSD kernel and the ZFS file system that has been proven through years of experience to be most suitable for high-end enterprise applications.

Not only does QES 2.1.0 provide reliable data protection, recovery, and business-class features, but it is also optimized for flash storage and is capable of driving outstanding performance for all-flash storage arrays to accelerate mission-critical services and eliminate challenges in VDI environments.

QES 2.1.0 also comes with Quality of Service (QoS) capabilities that help ensure consistent primary storage performance in multi-application environments. Continuing the same user experience with the intuitive QTS operating system, QES provides business users with an easy learning curve for quick implementation within IT infrastructures.

Unleashed SSD potential – cost-effective and agile with ultimate performance

QES 2.1.0 features QNAP’s exclusive Write Coalescing algorithm that further optimizes all-flash performance in ZFS, providing a highly cost-effective all-flash solution for enterprise-class data management and mission-critical services.

Write Coalescing algorithm
Transforms all random writes to sequential writes along with reduced I/O. It not only effectively increases random write performance for all-flash environments but also can improve SSD lifespans.

Software-defined over-provisioning
Users can allocate an additional over-provisioning ratio for SSDs (from 1% to 60%) and Storage Pools (from 1% to 40%) for a constant performance boost of over 100%.

Deduplication and compression to maximize VDI storage performance

In VDI environments where there could be over 90% duplicate data from OS images and applications that are spread over virtual desktops, the QES-powered ES1686dc provides businesses with the most cost-effective remote virtual desktop platform and mission-critical information warehousing.

Inline data deduplication

Block-based data deduplication optimizes storage usage and significantly decreases storage capacity requirements.

Inline compression
Shrinks data size to reduce storage I/O workloads for improved performance. In VDI, deduplicated virtual desktops are easily cached to achieve optimal virtual desktop performance.

Inline compaction

Especially helpful for increasing SSD storage utilization efficiency when highly-repetitive data or massive small files (e.g. transaction logs of banks or e-commerce) are generated. It delivers higher cost efficiency of all-flash storage systems.

Note: Data compaction in QES 2.1.0 does not support dual-controller NAS. This will be supported in future versions of QES.

Self-Healing ensures data integrity and reliability

Designed with a focus on data integrity, a fundamental aspect of storage security and reliability, the QES-based ES1686dc uses its end-to-end checksums to detect and correct silent data corruption caused by hardware defects, bugs in firmware, or metadata errors.

If integrity violations are detected, QES automatically repairs the damage using data from the other mirror before the data is passed to applications.

Streamlined remote backups with nearly limitless snapshots and SnapSync

The ES1686dc supports up to 65,536 snapshots for iSCSI LUN and shared folders (if 1 snapshot is created every hour, 24 snapshots per day, then up to 7 years worth of snapshots can be created without needing to delete any) and replicates snapshots to remote servers by using the block-level SnapSync.

In the event of a primary site failure, SnapSync assists businesses in resuming essential services in the shortest possible time.

Create VMware/Windows backups for VSS-Aware applications using QNAP Snapshot Agent

QNAP Netbak Replicator is an easy-to-use and VSS-aware backup software, helping businesses to create complete backups in data centers and virtualization environments without needing additional software.

To build a QNAP Snap Agent and VSS Hardware Provider operating environment, all applications (including VSS Service, Requestor, Provider, and QNAP Snap Agent) can be deployed with VSS-Aware application on the same server, and the minimal requirements are only one ES1686dc and one server for it to be operational.

Compatible with VMware, Microsoft, and Citrix virtualization, and supports iSER

The ES1686dc supports VMware® vSphere® 6.5, Windows Server® 2016, and Citrix XenServer® 7.0 for flexible deployment and management in virtualization environments. It also supports VMware® VAAI and Microsoft® ODX to increase performance by offloading server loading for ESXi® server and Hyper-V® respectively.

The QNAP vSphere Client plug-in, Web plug-in, and QNAP SMI-S provider are also supported to increase the efficiency of operations and management in virtualization applications. The ES1686dc and VMware® ESXi server installed with NVIDIA® Mellanox Smart NICs that support iSER can acquire iSER advantages to offload CPU workloads with boosted VMware® virtualization performance.

QES is OpenStack Ready to explore out-of-the-box enterprise cloud services

QES supports OpenStack® Cinder and Manila file-sharing services. With the QNAP Cinder Driver, the ES1686dc can provide block-level storage space to virtual machines. It not only accelerates the deployment of virtual machines and enhances virtual machine image access efficiency through iSCSI, but it is also easier to integrate into commercial cloud storage platforms, providing businesses with a flexible, easy-to-use, and low-cost storage solution.

Standard 5-year warranty

The ES1686dc is backed by a 5-year warranty at no extra cost. This premier warranty demonstrates QNAP’s dedication to your essential business needs for continuous operations and non-interrupted services.