Seagate
Seagate Cheetah NS ST3400755SSProduct 400 GB 3.5" SAS internal hard drive
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Qnap
Qnap CTL-ES1686DC-2123IT-32G 32GB rackmount NAS
A 16-bay rackmount NAS controller with an Intel Xeon D-2123IT processor and 32 GB memory, supporting up to 352 TB of SAS and SATA storage
- HDD Interface16 x SAS (16 x Bay)
- Form Factor16-Bay
- ProcessorIntel® Xeon® D-2123IT 4-core 2.20 GHz processor (burst up to
- Installed Memory32GB
- Max Memory Capacity512GB
- Memory Slot8
- Intel Xeon D-2123IT four-core processor at 2.20 GHz with 3.0 GHz burst
- 32GB memory installed, expandable to 512GB across eight slots
- Redundant hot-swap 770W power supplies maintain uptime
- Sixteen SAS bays support 3.5-inch and 2.5-inch drives up to 352TB
- Compact 132 mm 2U rackmount form factor fits dense deployments
Purpose-built controller
This Qnap CTL-ES1686DC-2123IT-32G is a new rackmount NAS controller FRU designed for the ES1686dc chassis. It delivers an Intel Xeon D-2123IT 4-core processor running at 2.20 GHz with burst up to 3.0 GHz and 32 GB of installed memory across eight slots. The unit supports 16 SAS drive bays for 3.5-inch or 2.5-inch SAS/SATA hard disks and SSDs, scaling to a maximum raw capacity of 352 TB. It targets environments that need ultra-high performance for a large number of concurrent users.
Thermals and power
Redundant hot-swap power supplies accept 90 to 264 VAC input and are rated at 770 W, with typical operating draw measured at 500.87 W. The controller is specified for continuous operation between 0 and 40 °C and can be stored from -20 to 70 °C. Humidity tolerance spans 5 to 95 % RH non-condensing with a wet-bulb limit of 27 °C. No power supply or battery backup unit is included with this FRU.
Build integration
The controller occupies a 16-bay form factor measuring 132 by 483.05 by 630.62 mm and weighs 25.83 kg net. It requires a compatible ES1686dc chassis, separate power supply modules and a battery backup unit to become operational. Eight memory slots allow expansion up to 512 GB for workloads that outgrow the factory 32 GB. Builders who need integrated power supplies or a populated drive set should look elsewhere.
Highlights
- Intel Xeon D-2123IT four-core processor at 2.20 GHz with 3.0 GHz burst
- 32GB memory installed, expandable to 512GB across eight slots
- Redundant hot-swap 770W power supplies maintain uptime
- Sixteen SAS bays support 3.5-inch and 2.5-inch drives up to 352TB
- Compact 132 mm 2U rackmount form factor fits dense deployments
Specifications
| Brand | QNAP |
|---|---|
| Part Number | CTL-ES1686DC-2123IT-32G |
| HDD Interface | 16 x SAS (16 x Bay) |
| Form Factor | 16-Bay |
| Processor | Intel® Xeon® D-2123IT 4-core 2.20 GHz processor (burst up to 3.0 GHz) per controller |
| Installed Memory | 32GB |
| Max Memory Capacity | 512GB |
| Memory Slot | 8 |
| Included HDD Capacity | Diskless System |
| Max Capacity | 352TB |
| Drive Compatibility | 3.5-inch SAS/SATA hard disk drives 2.5-inch SAS/SATA hard disk drives 2.5-inch SAS/SATA solid state drives |
| Power | Redundant/ Hot Swap Power Vin:90~264VAC;770W |
| Power Consumption | Operating Mode, Typical: 500.87 W |
| Usage | Ultra high prerformance for large number of users |
| Temperature | Operating Temperature: 0 - 40 °C (32°F - 104°F) Storage Temperature: -20 - 70°C (-4°F - 158°F) |
| Humidity | 5-95% RH non-condensing, wet bulb: 27°C (80.6°F) |
| Dimensions | 132 × 483.05 × 630.62 mm |
| Weight | Weight (Net): 25.83 kg Weight (Gross): 32.69 kg |
| Shipping weight | 4.76 kg |
| Package size | 394 × 318 × 267 mm |
Questions about this item
How do I install the Intel Xeon D-2123IT controller into the 16-bay SAS chassis, and what step is often missed?
Slide the controller module into the dedicated slot until the latch clicks, then seat all 16 SAS drive trays; the step often missed is verifying both redundant 770 W power supplies are fully engaged before powering on.
Which components will need replacement first during long-term operation of this 32 GB system?
The hot-swap SAS drives and the dual 770 W power supplies are the primary field-replaceable units; memory can be expanded later using the eight DIMM slots up to 512 GB.
What thermal limit appears first when the dual-controller NAS runs sustained workloads at 500.87 W typical draw?
The operating temperature ceiling of 40 °C is the first limit reached; airflow must keep the 132 mm-high enclosure within the 5–95 % RH non-condensing range to avoid throttling.
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