The ES2486dc Enterprise ZFS NAS is QNAP’s first high-availability NAS with all-flash arrays and dual active controllers. Powered by an Intel® Xeon® D-2142IT 8 cores/16 threads processor, the ES2486dc supports up to 24 x 2.5-inch SAS 12Gbps SSDs and provides excellent I/O throughputs. Random write performance for all-flash arrays is further driven by the flash-optimized QES 2.1.1 operating system that comes pre-installed on the ES2486dc. The QES uses ZFS to support logical volume management; block-based inline data deduplication and inline compression reduce I/O and SSD storage consumption, which significantly extends SSD lifespan with higher price-performance ratio for all-flash storage arrays. Coupled with near-limitless snapshots and SnapSync for data protection, the QES-based ES2486dc fulfills demanding business applications, such as mission-critical file servers, virtualization servers, VDI, medium-sized data center, video streaming, surveillance storage, and efficient file backup and recovery.
Intel® Xeon® D dual active-active controllers provide superb uptime and redundancy to ensure high availability (HA).
Battery-protected DRAM write to cache data protection and flash read acceleration provides industry-leading random access performance.
PCIe expandability allows for 10GbE/25GbE adapters to increase application performance.
Four 10GbE SFP+ ports accelerate large file sharing and intensive data transfer from virtualization or datacenter.
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® 2019 and Citrix® XenServer® 7.0 for storage virtualization. Compatible with OpenStack® cloud environments.
In Active-Active storage system architecture, both controllers can provide a comprehensive range of services, which is different from the Active-Standby architecture of single-controller systems. An advantage of Active-Active architecture is the lack of idle computing resources. To leverage the strengths of the ES2486dc Active-Active controller architecture, QNAP recommends creating multiple storage pools and distributing ownership between both controllers to enable simultaneous output from both controllers for improved load balancing.
Although SATA 6Gbps SSDs provide high-performance affordable storage, this type of drive is unsuitable for dual-controller environments because it lacks dual-port support. By using a QDA-SA3 adapter specially designed for QNAP all-flash Enterprise ZFS NAS, a SATA 6Gbps drive can be used in the 2.5-inch SAS drive bay of the ES2486dc— allowing storage capacity expansions with cost-effective SATA drives. By installing a SATA SSD with the QDA-SA3 into the dual-controller ES2486dc, the SATA SSD can share SAS dual-port advantages to ensure a high-availability and fault-tolerant enterprise storage environment.
The ES2486dc provides two PCIe Gen 3.0 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 a Smart NIC that supports iSER can improve VMware® virtualization performance. You can also install a SAS expansion card ( SAS-12G2E ) for connecting up to seven 16-bay EJ1600 v2 expansion enclosures to seamlessly expand potential storage capacity to over 1PB, with unprecedented performance of up to 48 Gbps per host connection.
QES 2.1.1 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.
CPU | Intel® Xeon® D-2142IT 8-core 1.90 GHz processor, up to 3.0 GHz |
CPU Architecture | 64-bit x86 |
Floating Point Unit | |
Encryption Engine | (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.
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Flash Memory | 4GB (Dual boot OS protection) |
Drive Bay |
24 x 2.5-inch
SAS 12Gb/s, backward-compatible to SAS 6Gb/s
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Drive Compatibility |
2.5-inch bays: 2.5-inch SAS/SATA hard disk drives 2.5-inch SAS/SATA solid state drives 1. When installing SATA HDD/SSD, QDA-SA3 adapter is required.
2. The QDA-SA3 adapter is designed for QNAP Enterprise ZFS NAS and allows the use of a SATA 6Gbps drive in a 2.5-inch SAS drive bay |
Hot-swappable | |
SSD Cache Acceleration Support |
Read cache only |
Cache for Copy To Flash (C2F) | 1 per each controller (64GB M.2 SSD) |
Gigabit Ethernet Port (RJ45) | 3 for each controller (one for remote management) |
10 Gigabit Ethernet Port | 4 x 10GbE SFP+ for each controller |
Wake on LAN (WOL) | |
Jumbo Frame | |
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.
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Form Factor | 2U 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) | 88.3 × 446.2 × 504.1 mm |
Weight (Net) | 23.4 kg |
Weight (Gross) | 27.4 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;700W |
Power Consumption: Operating Mode, Typical |
579.59 W
Tested with drives fully populated.
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Fan | Hot-swappable fan module (60*60*38mm; 16000RPM/12v/2.8A x 3) |
System Warning | Buzzer |
Standard Warranty | 5 |
Max. Number of Concurrent Connections (CIFS) - with Max. Memory | 10000 |
Safety Standard |
FCC Class A (USA only) CE Mark ( EN55022 Class A, EN55024) EN60950 BSMI VCCI CB LVD |
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