QNAP ES1640dc v2 Dual Controller Active-Active NAS

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  • Dual active controllers, NVRAM cache, dual mini-SAS channel backup, 40GbE-ready, SAS 12Gb/s-enabled
  • QES operating system which is based on FreeBSD and ZFS
  • Data deduplication and compression allows hosting over 500 VDI in one chassis
  • Near-limitless snapshots and SnapSync for efficient disaster recovery
  • NAS and iSCSI/IP-SAN storage supporting VMware®, Microsoft® Hyper-V, KVM and advanced virtualization features
  • Fully supports OpenStack® iSCSI Cinder driver
  • Scalable design, over 1 PB total storage capacity
  • 5 year warranty – Global warranty inclusive
QNAP ES1640dc v2 Dual Controller Active-Active NAS
QNAP ES1640dc v2 Dual Controller Active-Active NAS

Price History



The ES1640dc v2 is an innovative and comprehensive NAS system that incorporates all the latest software and hardware technologies. The models in this product line allow for virtually limitless snapshots with SnapSync, which protects your vital data and facilitates maximal disaster recovery readiness.

This system incorporates dual Intel Xeon E5 processors, and it features the brand-new QES operating system, which is a significant upgrade from QNAP’s previous QTS system. This trend-setting NAS system also incorporates the ZFB filesystem, which can handle incredible amounts of data. In addition, the ES1640dc v2 features 16 bays, is OpenStack compatible, and is SAS 12GB/s-enabled.

Even though it is on the cutting edge of NAS server technology, the ES1640dc v2 shares many similarities with previous QNAP systems, which ensures a rapid and simple acclimation process.

Product Highlights

  • Dual active controllers to eliminate downtime for enhanced availability
  • Innovative FreeBSD-based QES operating system
  • Practically infinite snapshot capability for optimal disaster recovery
  • Incredible ability to incorporate up to 500 VDI in one unit
  • Scalable up to 1 petabyte (PB)
  • Multiple 10GbE SFP+ and 10GbE RJ45 connectivity ports
  • VMware compatibility for flexible deployment
  • 5-year warranty

Dual-Controller Processing Architecture

In conventional NAS systems, a single controller stays active to handle data processing. If this controller fails, downtime in which data is inaccessible is inevitable. However, the ES1640dc v2 features dual active-active controller architecture that incorporates two state-of-the-art Intel Xeon E5-2400 v2 processors, which means that a backup controller is standing by to handle data if the primary controller fails.

This NAS system connects to its JBOD enclosure with dual-path mini-SAS architecture, which ensures continuous connectivity even if it is not connected with the external JBOD cable. In business, having continuous access to data is critical, and this dual processor design ensures that your productivity remains uninterrupted.

QES Operating System with ZFS Filesystem

The brand-new QNAP Enterprise Storage (QES) operating system that’s loaded onto the ES1640dc v2 incorporates the best elements of previous OS versions while switching to the efficient and versatile FreeBSD kernel. This intuitive interface makes it easy for business users to deploy this cutting-edge NAS solution, and the ES1640dc v2 also incorporates a ZFS filesystem. ZFS has long been considered the gold standard when it comes to enterprise data management, and the universal popularity of ZFS makes it highly accessible for business applications.

Data Compression and Deduplication

When you’re running multiple VDI stations, it’s possible to duplicate up to 90% of your stored data. The ES1640dc v2 solves this potential inefficiency by supporting block-based deduplication, which eliminates redundant data. This service ensures rapid and smooth VDI performance, and it also reduces the amount of space necessary to run VDIs, which allows you to operate more virtual desktops simultaneously.

The ES1640dc v2 also automatically compresses data, which drastically improves your data efficiency. Whether you’re warehousing data or supporting a fleet of VDI interfaces, these advanced data storage protocols reduce your costs substantially.

Comprehensive Virtualization Storage

Due to its impressive cross-compatibility, this NAS solution from QNAP is a virtualization powerhouse. Not only does it support the latest VMware vSphere 6.0 virtualization software, but it also supports Hyper-V for Windows 10 and KVM, which operates on the Linux kernel. With this overarching virtualization platform, you can support dozens of discrete virtual environments running on various top competitors in the virtual machine community. This data management system also supports Microsoft ODX and VMware VAAI, which improves overall performance by offloading server loading. Best of all, this top-of-the-line NAS option from QNAP increases virtualization operations and management efficiency by supporting the QNAP SMI-S provider, QNAP vSphere Client plug-in, and Web plug-in interfaces.

SnapSync for Disaster Recovery


With the ES1640dc v2, you’ll never have to worry about disaster striking. This enterprise-class NAS solution can generate backup snapshots at intervals of up to every five minutes, and it supports the storage of up to 65,536 snapshots. Only the changed data is transferred with each snapshot, and deduplication and compression protocols are also employed to reduce the data that needs to be transferred. Plus, this innovative NAS system supports VMware vCenter Site Recovery (SRM) technology, and it also offers Storage Replication Adapter (SRA) compatibility for SRM, which fully insulates your network from disaster-related data loss.

NVRAM Reliability

To ensure optimal random write performance, this state-of-the-art NAS solution from QNAP features battery-protected NVRAM modules. These modules incorporate Copy-to-Flash technology, and they simultaneously write data to the cache and replicate it to a backup controller. This process provides incredibly reliable data integrity, and this NVRAM-backed write cache capability is highly effective when combined with responsive dual-controller architecture.

Storage Flexibility

As a cutting-edge NAS solution, ES1640dc v2 is compatible with the latest innovation in data storage technology.

The 16 Bay drives can admit either 3.5″ or 2.52″ drives to be loaded with SATA, SAS, or SSD drives. In terms of data accessibility, the ES1640dc v2 supports both SAS 12Gb/s and SAS 6Gb/s hard drives, which ensures the fastest data writing and retrieval on the market. Since this innovative solution from QNAP can handle up to 1 PB of storage, you can incorporate any configuration of storage devices into the ES1640dc v2. As such, you can rely on lightning-fast SSDs for hot storage and have a fleet of SATA drives with up to 16 TB of storage each for cold storage purposes.

QNAP ES1640dc v2 Slide out rear panels


The ES1640dc v2 system features a total of six ports that connect this powerhouse data management system to the outside world. Specifically, it contains four 10GbE SFP+ network interface connectors and two additional 10 GbE RJ45 ports. This NAS system is the first option from QNAP to feature OpenStack compatibility, which opens a whole new world of cloud applications. Specifically, the new QES operating system supports OpenStack Cinder and iSCSI Cinder Node drivers, which makes it easy to integrate this system into commercial cloud storage solutions. Incorporation of iSCSI technology also accelerates VDI deployment and facilitates greater virtual machine image access.

Application and Use Case

Since the ES1640dc v2 is a high-end system with practically limitless storage and retrieval potential, its ideal application is in an established business setting in which existing data infrastructure tools have become ill-equipped to keep up with growth patterns. While this system excels as a standalone NAS solution, it can also work in tandem with auxiliary units to deliver data management capabilities befitting of the upper extremities of the medium-size business spectrum.

With lightning-quick data transfer speeds and opportunities for expansion, the ES1640dc v2 excels as a VDI hub that can service the needs of an entire team with incredible efficiency due to its redundancy-reducing protocols. Since it can back up your data at incredibly dense rates, this single NAS system can serve as the backbone of a reasonably large enterprise or the latest addition to an advanced data management network. In addition, this system comes with a five-year warranty.

The ES1640dc v2 is best suited for medium-large enterprises that are searching for a comprehensive and expandable NAS system, with an active-active dual controller solution. The price range for the ES1640dc v2 is between $11,339.06 and $16,706 across the various configurations.

QNAP ES1640dc-E5-v2-96G 16-Bay Rackmount NAS Diskless
QNAP ES1640dc-E5-v2-96G 16-Bay Rackmount NAS Diskless

Additional information

Specification: QNAP ES1640dc v2 Dual Controller Active-Active NAS



Intel Xeon 6-core Processor E5-2420 v2 (15M Cache, 2.20GHz), Intel Xeon E5-2400 v2 family processor

Installed Memory (RAM)




Internal Cache Port



4 x SFP+ (Intel XL710-AM1) and 2 x RJ45 (LAN-10G2T-X550) for each controller

Drive Bays

16 Bay

Product Warranty

5 Year



Form Factor (U)



5.20" x 17.57" x 24.33"


58.97 lbs.


Intel Xeon E5-2400 v2 family processor

Intel Xeon 6-core Processor E5-2420 v2 (15M Cache, 2.20 GHz)

Default/ Max. Memory

System memory: DDR3 RDIMM

Total memory slots: 6 (Dual controllers, 2 x main memory DIMM and 1 x write cache DIMM for NVRAM for each controller.)

32GB, 64GB for main memory DIMM and 16GB write cache DIMM per controller


Power Consumption:

Sleep mode: 314.86W

In operation: 501.40W

Power Supply: 770W (Redundancy for fault tolerance)

Port RJ-45

10/100/1000 Mbps LAN Port: 1 for each controller (for remote management)

10 Gbps LAN Port: 4 x SFP+ (Intel XL710-AM1) and 2 x RJ45 (LAN-10G2T-X550) for each controller

Port USB

2 x USB 3.0, 2.0 port (For Developement and debug only)

HDD Interface

16 x 3.5", 2.5" SAS 12Gbps, 6Gbps hard drive, or 2.5" SAS SSD, lockable tray

Max Number of Cameras


Max VPN Connections


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