16-Bay Dual-Controller Enterprise ZFS NAS
QNAP ES1686dc-2142IT-128G Enterprise NAS
A 3U dual-active-controller Enterprise ZFS NAS with sixteen 3.5-inch SAS bays, 64GB RDIMM DDR4 ECC per controller, four 10GbE SFP+ ports per controller, PCIe expansion and redundant hot-swap power.
High-availability 16-bay storage with QES and ZFS
The QNAP ES1686dc-2142IT-128G is a dual-active-controller Enterprise ZFS NAS for business storage that prioritises service continuity and data protection. It combines sixteen SAS bays with QES, ZFS data services, per-controller 10GbE connectivity, PCIe expansion and redundant power in a 3U rackmount chassis.
Key features and benefits
Dual active controllers
The dual-controller architecture is designed to support high availability and redundancy.
Sixteen SAS bays
The 3.5-inch bays accept the listed 3.5-inch SAS hard drives, 2.5-inch SAS hard drives and 2.5-inch SAS solid-state drives.
QES with ZFS
QES provides the stated snapshots, SnapSync, block-level deduplication and inline compression functions.
Per-controller 10GbE
Four 10GbE SFP+ ports are listed for each controller.
64GB ECC per controller
Each controller includes 64GB RDIMM DDR4 ECC, with a stated maximum of 512GB.
Redundant power and cooling
Redundant hot-swap power and hot-swappable fan modules support rack deployment.
Who is this model best for?
A strong choice for
- High-availability business storage
- Mission-critical file services
- Virtualisation and VDI storage
- Enterprise backup and recovery
- 3U rackmount deployments using SAS drives
Consider another model if you need
- You need 2.5-inch-only all-flash bays
- You need a single-controller desktop NAS
- You require a confirmed processor clock description before purchase
Key specifications
- Memory
- 64GB RDIMM DDR4 ECC per controller
- Maximum memory
- 512GB per controller configuration
- Drive bays
- 16 × 3.5-inch SAS 12Gb/s
- Drive compatibility
- 3.5-inch SAS HDD; 2.5-inch SAS HDD and SSD
- 10GbE
- 4 × 10GbE SFP+ per controller
- Gigabit Ethernet
- 3 ports per controller; one assigned for remote management
- PCIe slots
- 2 × PCIe Gen3 x8 per controller
- Form factor
- 3U rackmount
- Power supply
- Redundant hot-swap, 770W
- Dimensions
- 132 × 446.2 × 587.75 mm
Full technical specifications
Processor, memory and storage
| CPU Architecture | 64-bit x86 |
|---|---|
| Floating Point Unit | Supported |
| Encryption Engine | Supported (AES-NI) |
| System Memory | 64 GB RDIMM DDR4 ECC (4 x 16 GB) per controller |
| Maximum Memory | 512 GB (8 x 64GB) |
| Memory Slot | 8 x R-DIMM/LR-DIMM DDR4 IMPORTANT: You can only use one type of dual in-line memory module (DIMM) at a time. Do not use registered DIMM (RDIMM) with load-reduction DIMM (LRDIMM) memory. |
| Flash Memory | 4GB (Dual boot OS protection) |
| Drive Bay | 16 x 3.5-inch SAS 12Gb/s, backward-compatible to SAS 6Gb/s |
| Drive Compatibility | 3.5-inch bays: 3.5-inch SAS hard disk drives 2.5-inch SAS hard disk drives 2.5-inch SAS solid state drives |
| SSD Cache Acceleration Support | Supported Read cache only |
| Cache for Copy To Flash (C2F) | 1 per each controller (64GB M.2 SSD) |
| Max. Number of Concurrent Connections (CIFS) - with Max. Memory | 10000 |
Software and system features
| Hot-swappable | Supported |
|---|---|
| System Warning | Buzzer |
Network, ports and expansion
| Gigabit Ethernet Port (RJ45) | 3 for each controller (assign one for remote management) |
|---|---|
| 10 Gigabit Ethernet Port | 4 x 10GbE SFP+ for each controller |
| Wake on LAN (WOL) | Supported |
| Jumbo Frame | Supported |
| PCIe Slot | 2 per controller Slot 1: PCIe Gen 3 x8 (CPU) Slot 2: PCIe Gen 3 x8 (CPU) Card dimensions for PCIe slot 1~Slot 2:215 x 68.9 x 18.76 mm / 8.46 x 2.71 x 0.74 inches. Wider cards can be installed if the next PCIe slot will not be used. |
| USB 3.2 Gen 1 port | 2 per each controller Note: The USB ports are for engineering purpose only. No external devices such as storage drives or UPS are supported. |
Physical, environmental and power
| Form Factor | 3U Rackmount |
|---|---|
| LED Indicators | System Power LED (Green): on/off System Status (Green/ Orange): 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 |
| Buttons | Power, Reset |
| Dimensions (HxWxD) | 132 × 446.2 × 587.75 mm |
| Weight (Net) | 30.22 kg |
| Weight (Gross) | 34.92 kg |
| Operating Temperature | 0 - 40 °C (32°F - 104°F) |
| Storage Temperature | -20 - 70°C (-4°F - 158°F) |
| Relative Humidity | 5-95% RH non-condensing, wet bulb: 27°C (80.6°F) |
| Power Supply Unit | Redundant/ Hot Swap Power Vin:90~264VAC;770W |
| Power Consumption: Operating Mode, Typical | 500.87 W Tested with drives fully populated. |
| Fan | Hot-swappable fan module (60*60*38mm; 16000RPM/12v/2.8A x 3) |
Warranty and certifications
| Safety Standard | FCC Class A (USA only) CE Mark ( EN55022 Class A, EN55024) EN60950 BSMI VCCI CB LVD |
|---|
Frequently asked questions about the ES1686dc-2142IT-128G
What is the QNAP ES1686dc-2142IT-128G?
It is a 3U dual-active-controller Enterprise ZFS NAS with sixteen 3.5-inch SAS bays.
How much memory is included in the ES1686dc-2142IT-128G?
The specifications list 64GB RDIMM DDR4 ECC per controller.
How many drive bays does the ES1686dc-2142IT-128G have?
It has sixteen 3.5-inch SAS bays.
Which drives are listed for the ES1686dc-2142IT-128G?
The listed compatibility includes 3.5-inch SAS hard drives, 2.5-inch SAS hard drives and 2.5-inch SAS solid-state drives.
How many 10GbE ports are provided?
Four 10GbE SFP+ ports are listed for each controller.
Are the drive bays hot-swappable?
Yes. Hot-swappable drive support is listed.
How many PCIe slots are included?
Each controller has two PCIe Gen3 x8 slots.
Which operating system is highlighted?
The product information highlights QES 2.1.0 with ZFS data services.
What are the ES1686dc-2142IT-128G dimensions?
The stated dimensions are 132 × 446.2 × 587.75 mm.
Does this configuration include drives?
No. This is a diskless configuration.
Important information
This is a diskless system.
The USB ports are specified for engineering purposes only; external storage devices and UPS units are not supported.
Registered and load-reduced DIMMs must not be mixed.
