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QNAP QNP-ES1640dc-E596G Enterprise ZFS NAS, offering nearly zero-downtime highly reliable services

QNAP QNP-ES1640dc-E596G Enterprise ZFS NAS, offering nearly zero-downtime highly reliable services

CPU:Intel Xeon 6-core Processor E5-2420 v2 (15M Cache, 2.20GHz), RAM: 32GB DDR4 RAM (Total memory slots: 6), Maximized Raw Capacity128TB, 10Gbps LAN Port x2, Gigabit LAN Port x1, USB3.0 port x2, PCIe Gen2 Slot x4, 5 Years Warranty


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Rating: 5.8/10 (4 votes cast)

QNAP NAS ES1640dc-E596G 
Enterprise ZFS NAS, offering nearly zero-downtime highly reliable services


The ES1640dc is whole-new product line developed by QNAP for mission-critical tasks and intensive virtualization applications. With Intel® Xeon® E5 processors, dual active controllers, ZFS, HPE Helion compatibility and fully supporting virtualization environments, the ES1640dc delivers “real business-class” cloud computing data storage. The ES1640dc features the brand-new QES operating system that allows almost limitless snapshots, block-level data deduplication, and thin provisioning with reclaim, assisting businesses in building the most cost-efficient VDI platform and storage for critical data. The ES1640dc provides the same user experience as the current QNAP NAS and QTS system, allowing business users to enjoy the easy learning curve and quickly deploy the system, and making it ideal for small and medium businesses with budget constraints or large-scale IT divisions coping with mission-critical tasks.

  • Dual active controllers, NVRAM cache, dual mini-SAS channel backup, 40GbE-ready, SAS 6Gb/s-enabled (Compatible with SAS 12Gb/s)
  • QES operating system which is based on FreeBSD and ZFS
  • Data deduplication and compression allows hosting over 200 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, and compatible with HPE Helion
  • Scalable design, up to 1 PB total storage capacity
  • 5 year warranty - Global warranty inclusive

Intel® Xeon® E5 dual-controller for nearly zero downtime high-availability

The ES1640dc is powered by two Intel® Xeon® E5-2400 v2 processors and features dual active-active controller architecture, ensuring businesses with nearly zero downtime high availability as the standby controller can quickly take over if one controller breaks down. The ES1640dc connects to the JBOD enclosure (EJ1600) via the dual path mini-SAS design to sustain continuous operations even if an external JBOD cable is disconnected. Designed around redundancy, the ES1640dc is the best realization of reliable enterprise storage for uninterrupted mission-critical enterprise tasks and productivity.

QNAP NAS Active-Active HA

Dual controller NAS: high reliability and high availability

“Reliability” is the primary priority for mission critical business applications. The ES1640dc adopts dual active-active controllers to provide the most reliable base for business IT storage.

QNAP NAS Dual controller NAS
1. Dual active-active controller

If one controller fails, the other one will immediately take over to provide high availability with the least downtime.

2. Built-in 2 x 10GbE RJ45 ports

Meets various iSCSI/NFS/CIFS network data transmission requirements.

3. 40GbE NIC support

The PCIe slot supports a dual-port QSFP+ 40GbE NIC to provide massive data transmission potential and to simplify network cabling.

4. SAS 6Gb/s hard drive

Dual-controller architecture that supports SAS 6Gb/s hard drives / SSDs, providing versatile storage choices for enterprises.

5-1. NVRAM w/ Copy-to-Flash

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

5-2. DDR3 RAM

(1) NVRAM dedicated DDR3 memory modules - supports 16GB, power required by C2F is supplied by BBU.
(2) Dual-channel DDR3 system main memory - each channel supports 16GB, providing up to 32GB total capacity.

5-3. mSATA SSD

Stores cache data written by DRAM to ensure information is not lost if the system experiences a sudden power failure.

6. Dual Path Mini-SAS 6Gb/s (EJ1600) JBOD architecture

Increases the ES1640dc’s potential storage capacity to over 1 PB with expansion enclosures.

7. Intel® Xeon® E5-2400 v2 series processor

Provides the performance required by software-defined storage and commercial mission-critical applications.

8. Field-replaceable unit

Field-replaceable unit (FRU) applies not only to the controllers but also to the cooling fans, power supplies, and the BBU battery pack for C2F (Copy-To-Flash), providing a cost-effective way to maintain complex systems and to replace defective parts.

QNAP NAS Dual controller NAS QNAP NAS Dual controller NAS

NVRAM cache reducing the risks of losing write cache data

To increase random write performance and reliability, the ES1640dc features NVRAM modules (DRAM Write Cache with Copy-to-flash) to protect write data. When data is written into NVRAM, there are dedicated backup battery units to protect writing to the cache, and at the same time the data is replicated to a backup controller, to achieve 100% data integrity. NVRAM-backed write cache in the dual-controller architecture presents high performance, fault-tolerant, and helps reduce flash SSD write amplification.

*To ensure write cache data safety, it is recommended to annually replace the BBU.

QNAP NAS NVRAM cache reducing the risks

QES operating system combining ZFS file system

The ES1640dc features the brand-new QES (QNAP Enterprise Storage) 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. QES supports dual active controller architecture and remote disaster recovery, can be directly integrated into OpenStack® cloud environments, and is designed for intensive virtualization and VDI applications with optimal performance. Continuing the same user experience with the QTS operating system, QES provides business users with an easy learning curve to quickly deploy the ES1640dc, and provides the best storage solution jointly with the current QNAP NAS.

QNAP NAS QES operating system combining

Overview of QNAP Enterprise ZFS NAS and the QES operating systems

QNAP Enterprise System
QNAP Turbo NAS System
Hardware platform Enterprise ZFS NAS
ES series NAS
TS / TVS / TAS / TDS series
Operating system kernel FreeBSD Linux
File system ZFS Ext4
myQNAPcloud Yes Yes
App support Qmanager, Qfile All available apps
File Station Yes Yes
App Station No Yes
Virtualization Station No Yes
Container Station No Yes
Dual active controller Yes No
NVRAM (Write to cache) Yes No
40G Ethernet network Yes Yes
Intel Quick Assist No Yes
Snapshot upper limit 65536 1024
Single LUN snapshot upper limit 65536 1024
Deduplication Yes No
Real time data compression Yes No
End-to-End Data Integrity Yes No
Application consistency Snapshot Agent
VSS Hardware Provider
(QNAP NetBak Replicator)
Snapshot Agent
VSS Hardware Provider
(QNAP NetBak Replicator)
Remote disaster backup and recovery SnapSync Snapshot Replica

ZFS – the best file system for business data storage

The ES1640dc features ZFS, a combined file system and logical volume manager, to support various advanced functions for high-end enterprise storage, including powerful storage expansion, flexible storage pools, simplified management, high-performance SSD cache, nearly limitless snapshots and cloning, data deduplication, in-line compression and thin provisioning with reclaim for optimized utilization for virtual machine storage. ZFS is designed with a focus on data integrity, and uses its end-to-end checksums to detect and correct silent data corruption caused by hardware defects, bugs in firmware or metadata errors, effectively protecting user’s data.


Deduplication and compression to maximize VDI storage performance

There could be over 90% duplicate data from OS images and applications that are spread over virtual desktops. The ES1640dc supports block-based data deduplication to optimize storage usage from redundant data. Deduplicated virtual desktops become easier to be cached to achieve optimal virtual desktop performance. In-line data compression helps shrink data size, further optimizing storage usage. For mastering storage in a virtualized environment, the ES1640dc provides businesses with the most cost-effective remote virtual desktop platform and mission-critical information warehousing.

QNAP NAS Deduplicate and compression

Strong disaster recovery made by nearly limitless snapshots and SnapSync

The ES1640dc supports up to 65,536 snapshots for iSCSI LUN and shared folders. When executing a remote snapshot backup, it only needs to transfer changed data, and can use deduplication and compression to significantly reduce the amount of transferred data. The ES1640dc can provide remote backup SnapSync for snapshots at the shortest interval of every five minutes, fully supports VMware vCenter Site Recovery (SRM) technology, provides Storage Replication Adapter (SRA) for SRM, and provides enterprise-class remote backup & disaster recovery solution to fulfill business continuity.

QNAP NAS Strong disaster recovery

Well-rounded backup solutions to secure data

QNAP Netbak Replicator is an easy-to-use and VSS-aware backup software, and helps businesses to create complete backups in datacenter and virtualization environments without needing to purchase expensive and complex commercial 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 applications on the same server, and the minimal requirements are only one ES1640dc and one server for it to be operational.

QNAP NAS Well-rounded backup solutions

Storage for comprehensive virtualization applications

The ES1640dc is certified for VMware® vSphere 6.0, and is compatible with Microsoft® Hyper-V and KVM, benefiting flexible deployment and management in virtualization environments. The ES1640dc supports VMware VAAI and Microsoft ODX to increase performance by offloading server loading for ESXi server and Hyper-V respectively, and supports QNAP vSphere Client plug-in, Web plug-in and QNAP SMI-S provider with enhanced efficiency of operations and management in virtualization applications.

Learn more: VMware® Ready™, Microsoft® Hyper-V™, VMware VAAI, Microsoft ODX, SMI-S provider for Microsoft SCVMM

QNAP NAS Storage for comprehensive

Compatible with HPE Helion for extending horizons to OpenStack cloud

As QNAP’s first "OpenStack Ready" product line, the ES1640dc is not only suitable for virtualization and virtual desktop environments but also the best choice for cloud applications. QES supports OpenStack® Cinder and iSCSI Cinder Node drivers, and provides 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. QES can be easily coupled with HPE Helion* to provide simpler and more reliable private enterprise hybrid cloud solutions, to ensure that enterprises can still enjoy uninterrupted, highly available, highly-stable services in dense virtualized environments.

*QES will complete HPE Helion certification soon.

QNAP NAS Compatible with HPE Helion

5 year warranty - Global warranty inclusive

QNAP's ES1640dc offers 5 year warranty with 3-year global warranty inclusive at no extra cost. This premier warranty demonstrates QNAP's attention to the essential business needs of continuous operations and non-interrupted services to their customers.

Learn more: QNAP warranty services

QNAP NAS 5 year warranty

Seamless capacity expansion

The ES1640dc supports efficient capacity expansion by cascading multiple QNAP RAID expansion enclosures to meet the needs of growing business data, providing businesses a cost-efficient storage solution for large data archiving and virtualization applications.

Featuring dual controllers, dual-loop architecture, the ES1640dc and the corresponding JBOD expansion enclosures all provide dual-channel (Dual Path) to tolerate single node failure. Even if an external JBOD cable is disconnected due to external damage to the mini-SAS cable, it can still run normally. This is essential for better intermachine data protection and capacity scalability.

The maximum total storage capacity available by connecting RAID expansion enclosures:

NAS Model RAID Expansion Enclosure No. of RAID Expansion Enclosure Total HDD No. (NAS + Enclosure) Max. Raw Capacity (TB)*
ES1640dc EJ1600 7 128 1024
6 112 896
5 96 768
4 80 640
3 64 512
2 48 384
1 32 256

*The maximum capacity is calculated by using 8TB HDDs.

Learn more: QNAP expansion enclosure


Hardware Specification

CPU Intel Xeon E5-2400 v2 family processor
Intel Xeon 6-core Processor E5-2420 v2 (15M Cache, 2.20GHz)
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 for main memory DIMM and 16GB write cache DIMM per controller.
USB 2 x USB 3.0/2.0 port
Hard Drive 16 x 3.5"/2.5" SAS 6Gbps hard drive (compatible with SAS 12Gbps hard drive), or 2.5" SAS SSD
Maximized Raw Capacity 128TB (Configuration: 16 x 8TB hard drives)
Hard Drive Interface SAS 6Gb/s
10/100/1000 Mbps LAN Port 1 for each controller (for remote management)
10Gbps LAN Port 2 x RJ45, Intel X540-BT2 for each controller
PCIe Slot PCIe Slot x8 (Gen3 x8): reserved for 40GbE or 10GbE LAN card
PCIe Slot x4 (Gen2 x4): reserved for dual path Mini-SAS
Cache mSATA SSD dedicated to NVRAM, SATA signaling
Form Factor 3U rackmount
Dimension 618(D) x 446.2(W) x 132(H) mm (excluding front grips)
Weight Net weight (NAS only): 26.75 kg / 58.97 lb
Gross weight (with packing and accessories): 36.94 kg / 81.44 lb
Sound Level Sound pressure (LpAm) (bystander position): 66.1dB
Power Consumption Sleep mode: 314.86 W
In operation: 501.40 W
Power Supply 770 W (Redundancy for fault tolerance)
Fan Hot-swappable fan module (60*60*38mm; 16000RPM/12v/2.8A x 3)
Electro-Magnetic Compatibility (EMC) • FCC Class A (USA only)
• CE Mark ( EN55022 Class A, EN55024)
SAFETY Standard • EN60950
• CB


1. Hard Drive Tray 3. Power On Button
2. Hard Drive LED Indicators 4. LED Indicators
System Power LED (Blue): on/off
System Status (Green/ Red): in operation, system errors, low power, degraded RAID mode, memory failure, fan/power supply failure, system/disk temperature too high, storage pool reaching threshold value, system performing take-over, power supply unit unplugged
LCD Status Display (Two-digit number): Status of JBOD connection


1. Password & Network Settings Reset Button 9. PCIe Gen2 x4 Slot, with dual path Mini-SAS (SFF-8088) expansion card on board
2. Power Supply LED (Green/ Orange) 10. PCIe Gen3 x8 Slot, reserved for 40GbE LAN card
3. RJ11 to RS-232 serial 11. BBU
4. 1GbE Management Port 12. BBU Status Light (Green/ Red/ Orange)
5. 2 x USB 3.0/2.0 Port 13. Controller Status Light (Green/ Orange)
6. 2 x 10GbE (RJ45) Port 14. Fan Status Light (Green/ Orange)
7. Power Button 15. Battery Status Light (Green/ Orange)
8. Reserved Mini-SAS Port (SFF-8088) 16. High Availability LED (Green/ Orange)
Designs and specifications are subject to change without notice.


Software Specification

Operating System
QES 1.1 (based on FreeBSD)
High Availability
  1. Active-Active/Active-Standby dual controller for NAS
  2. Active-Active dual controller for JBOD expander
  3. Automatically hardware error detection and failover
  4. Automatically failback when hardware recovered
  5. Data port network failover
  6. Management port network failover
  7. Near zero downtime high availability
  8. Dual SAS link loop
  9. MPIO and ALUA for iSCSI high availability
  10. Link aggregation for network high availability
  11. Support SMB3 Continuous Availability (CA)
Supported Client OS
  1. Windows 7 (32/64-bit), Windows 8 (32/64-bit), Windows 10 (32/64-bit), Windows Server 2008 R2/2012/2012R2
  2. Apple Mac OS X
  3. Linux & UNIX
Power Management
  1. Wake on LAN
  2. Internal hard drive standby mode
  3. Automatic power on after power recovery
  4. Network UPS support with SNMP management
Supported Browsers
  1. Microsoft Internet Explorer 10+
  2. Mozilla Firefox 8+
  3. Apple Safari 4+
  4. Google Chrome
Access Right Management
  1. Batch users creation
  2. Import/Export users
  3. User quota management
  4. Local user access control for CIFS/SMB and FTP
  5. Subfolder permissions support for CIFS/SMB, FTP, and File Station
Multilingual Support
  1. Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish
Domain Authentication Integration
  1. Microsoft Active Directory support
  2. LDAP client
  3. Domain users login via CIFS/SMB, FTP, and File Station
File System
  1. ZFS
  1. Multi-window, multi-tasking based system management
  2. Movable Icons and personalized desktop
  3. Smart toolbar and dashboard for neat system status display
  4. Smart fan Control
  5. SNMP (v2 & v3)
  6. Resource monitor
  7. Network recycle bin for file deletion via CIFS/SMB and File Station
    • Automatic Cleanup
    • File Type Filter
  8. Comprehensive logs (events & connection)
  9. Syslog client
  10. System settings backup and restore
  11. Restore to factory default
  12. Command Line Interface (CLI)
  1. TCP/IP (IPv4 & IPv6)
  2. 10 Gigabit NICs with jumbo frame (LACP, Load Balance, Failover, Round Robin)
  3. Service binding based on network interfaces
  4. Proxy client
  5. DHCP client
  7. Bonjour Discovery
File Server
  1. Shared folder for CIFS/SMB, NFS and FTP
  2. File sharing across Windows, Mac, and Linux/UNIX
  3. Windows ACL
  4. Advanced folder permissions for CIFS/SMB, FTP
  1. Network access protection with auto-blocking: SSH, HTTP(S), FTP, CIFS/SMB
  2. CIFS/SMB host access control for shared folders
  3. FIPS 140-2 validated AES 256-bit volume-based and shared folder data encryption
  4. Importable SSL certificates
  5. Instant alert via E-mail, SMS, beep
FTP Server
  1. FTP over SSL/TLS (Explicit)
  2. FXP support
  3. Passive ftp port range control
Storage Management
  1. Storage space utilization monitoring
  2. Storage pool with RAID 0, 1, 5, 6, 10, 50, 60, RAID TP, triple Mirror
  3. Global hot spare
  4. SSD read cache
  5. NVRAM write cache (BBU-protected)
  6. Scheduled Backup Battery Unit (BBU) learning
  7. Supports share folder/LUN with thin provisioning
  8. Supports LUN with instant provisioning
  9. Supports share folder quota
  10. Supports space reclaim
  11. Supports snapshots
    • Supports Shared Folder/LUN snapshot
    • Snapshot manager
    • Snapshot clone
    • Snapshot agent for Windows VSS and VMware
  12. Support inline deduplication for Shared Folder/LUN
  13. Support inline compression for Shared Folder/LUN
  14. Support inline encryption for Shared Folder/LUN
  15. Support WORM (Write Once Read Many) for Shared Folder
  16. Online LUN expansion
  17. Online Share Folder quota expansion
  18. Online storage pool expansion
  19. Hard drive S.M.A.R.T.
  20. SMART predict data migration
  21. Time-Limited Error Recovery (TLER)
  22. Storage expansion via QNAP EJ-1600 series expansion units*
  23. JBOD ID Reinitialized 
  24. JBOD enclosure roaming
  25. RAID recovery
  26. Checksum for end-to-end data integrity
  27. Silence error detection and self-healing
  28. Pool scrub for data verification
Backup Station
  1. Remote replication server over Rsync
  2. Remote replication server over Snapsync
  3. Scheduled backup
  4. Snapshot support for Rsync
  5. Compression, Dedup, and transfer rate limitation over Snapsync
  6. Desktop backup with QNAP NetBak Replicator for Windows
  7. Third party backup software support: Veeam backup & replication, Acronis True Image, Arcserve backup, emc retrospect, Symantec Backup Exec, etc.

Designs and specifications are subject to change without notice.



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