ES1686dc R2
High Availability Enterprise NAS with Dual Active Controllers
Ensure uninterrupted mission-critical business operations with the high-availability ES1686dc R2 NAS. With redundant controllers and power supplies, it minimizes downtime, allowing seamless component replacement without disruption, ensuring reliability and continuity for enterprises.
Dual active-active controllers
Dual active-active controllers provide supreme uptime and redundancy to ensure high availability.
NVRAM module
NVRAM reduces the risk of losing write cache data if unexpected power failure occurs.
QES operating system
Supports ZFS near-limitless snapshots, SnapSync, block-level data deduplication, and inline data compression.
Storage for virtualization
Supports VMware® vSphere®, Windows Server® and Citrix® XenServer® for storage virtualization.
10GbE SFP+ ports
Four 10GbE SFP+ ports (per controller) accelerate virtualization, large file sharing, and intensive data transfer.
PCIe Gen 3 slots
Two PCIe slots (per controller) allow for adding 10GbE/25GbE networking cards to increase application performance.
Active-Active architecture: 2 units in a single chassis
Note: It is recommended to create multiple storage pools and distribute their ownership between both controllers to leverage the strengths of the ES1686dc R2 active-active controller architecture. This allows simultaneous output from both controllers for better load balancing.
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Active-Standby Architecture
If the active system fails, the standby system starts up and takes over processing.
- Requires purchasing two systems for HA, doubling the cost.
- Causes load imbalance as only the active system processes workloads.
- A power outage may lead to data loss.
- Network disconnection invalidates the HA architecture, rendering it ineffective.
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Active-Active Architecture
Both systems are active simultaneously.
- Both controllers handle traffic, optimizing workload distribution.
- Copy-To-Flash protection safeguards data against power failure.
- Dual-path SAS interface ensures seamless connectivity.
- Efficient resource utilization, reducing computational waste.
- High-speed, uninterrupted, and high-availability storage service.
- Supports multiple communication protocols: SMB, NFS, and iSCSI.
Intel® Xeon® D processors bring high performance and efficiency
Powered by two Intel® Xeon® D processors, the ES1686dc R2 features a dual active-active controller architecture that provides failover/failback operations as the standby controller takes over if one controller breaks down.
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SMB Sequential Throughput (10GbE x 8)
Write 2201 MB/sRead 5773 MB/s -
iSCSI Random 4K IOPS (10GbE x 8)
Write 178552 IOPSRead 254828 IOPS
| SMB Sequential Throughput (10GbE x 8) |
Write
2201
MB/s
|
Read
5773
MB/s
|
|---|---|---|
| iSCSI Random 4K IOPS (10GbE x 8) |
Write
178552
IOPS
|
Read
254828
IOPS
|
Tested in QNAP Labs. Figures may vary by environment. Learn more about test environment.
Multi-level cache technology
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Multi-tier caching
The ES1686dc R2 simultaneously supports main memory read cache (L1 ARC), SSD secondary read cache (L2 ARC), and memory write cache (ZFS Intent Log) to meet performance demands of various enterprise applications.
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Expand main memory up to 512GB
Both controllers have eight RDIMM slots, allowing for up to 512GB memory.
The main memory will retain 8GB for use by the write cache.
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NVRAM
In the event of power failure, 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.
To ensure write cache data safety, it is recommended to annually replace the BBU. QNAP provides one-year warranty for the BBU.
PCIe Gen 3 slots
The ES1686dc R2 provides two PCIe Gen 3 x8 slots per controller connected to the CPU, allowing you to add additional functionality to meet growing workload and business requirements.
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Network Card
Supports up to 25GbE, boosting virtualization, media file transfer, or adding support for iSER for improved virtualization performance.
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SAS Storage Expansion Card
With the QXP-820S-B3408 SAS storage expansion card, you can scale up the ES1686dc R2 with QNAP’s TL SAS expansion enclosures.
Petabyte-scale, dual-controller SAS storage expansion
Gain petabyte-scale storage capacity using the QNAP’s expansion enclosure. Dual-channel (dual-path) connections allow service continuity even if one node fails.
