1. Introduction
This manual provides detailed instructions for the setup, operation, maintenance, and troubleshooting of your CENMATE Aluminum Dual Bay Hard Drive Enclosure. This device is designed to provide reliable external storage for 2.5-inch and 3.5-inch SATA HDDs/SSDs, supporting a maximum capacity of up to 20TB per hard drive.
Key features include:
- Support for 2.5"/3.5" SATA HDD/SSD, up to 20TB per drive.
- Built-in cooling fan and aluminum housing for efficient heat dissipation.
- USB 3.0 output interface with data transfer rates up to 5Gbps.
- Hot-swappable drive support for convenience.
- Tool-free installation for easy drive insertion and removal.
- Daisy chain expansion capability for increased storage.
- Wide compatibility with Windows, Mac, and Linux operating systems.

Figure 1: Front view of the CENMATE Dual Bay Hard Drive Enclosure.
2. Package Contents
Please verify that all items are present in the package:
- CENMATE Dual Bay Hard Drive Enclosure (NO RAID)
- USB A/C 3.0 Cable
- Power Adapter
- User Manual (this document)
- Screws and a small screwdriver (for securing drives, if preferred, though tool-free is supported)
3. Setup and Installation
3.1. Drive Installation (Tool-Free)
- Ensure the enclosure is powered off and disconnected from your computer.
- Gently pull out the drive trays from the front of the enclosure. The design allows for tool-free installation.
- Insert your 2.5-inch or 3.5-inch SATA HDD/SSD into the tray. Ensure the SATA connectors align correctly. For 3.5-inch drives, the tool-free mechanism will secure them. For 2.5-inch drives, you may use the provided screws for added stability if desired.
- Slide the loaded drive tray back into the enclosure until it clicks into place.

Figure 2: Illustrates the tool-free installation process for hard drives.

Figure 3: The enclosure with hard drives installed, demonstrating its large capacity capability.
3.2. Connecting to Your Computer
- Connect one end of the provided USB A/C 3.0 cable to the USB port on the back of the enclosure.
- Connect the other end of the USB cable to an available USB 3.0 (or higher) port on your computer (desktop or laptop).

Figure 4: The enclosure connected to a laptop, highlighting its plug-and-play compatibility with various systems.
3.3. Power Connection
- Connect the power adapter to the DC 12V power input port on the back of the enclosure.
- Plug the power adapter into a standard electrical outlet.
- The enclosure will power on automatically, and the drive indicator lights will illuminate.

Figure 5: The enclosure connected to its 12V power supply, ensuring stable data transfer.
4. Operating Instructions
4.1. Data Transfer
The enclosure utilizes a USB 3.0 interface, providing data transfer speeds of up to 5Gbps. This allows for rapid transfer of large files, such as 1GB files in 3-5 seconds.

Figure 6: Visual representation of the enclosure's high-speed 5Gbps data transfer capability.
4.2. Hot Swappable Functionality
The CENMATE enclosure supports hot swapping, meaning you can insert or remove hard drives without needing to power down the device or your computer. This enhances convenience for data management. Always ensure that data transfer to or from a drive is complete before removing it.
4.3. Daisy Chain Expansion
The enclosure features a USB HOST port, enabling daisy chain expansion. You can connect up to three CENMATE enclosures in a chain to expand your total storage capacity up to 120TB. Each device in the daisy chain requires its own power connection.

Figure 7: Demonstrates the daisy chain expansion feature, allowing multiple enclosures to be connected for increased storage.

Figure 8: Rear view illustrating the connection points for daisy-chaining multiple enclosures for enhanced data management.
4.4. Cooling Fan Operation
The enclosure includes a built-in cooling fan to maintain optimal operating temperatures for your hard drives, maximizing data security and drive longevity. The fan noise level is approximately 40-50 decibels. Users who are highly sensitive to noise should consider this aspect.

Figure 9: An internal view highlighting the upgraded built-in cooling fan and aluminum housing for heat dissipation.
5. Maintenance
To ensure the longevity and optimal performance of your CENMATE enclosure, follow these simple maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe the exterior of the enclosure. Do not use liquid cleaners or aerosols.
- Ventilation: Ensure the cooling fan vents are not obstructed to allow for proper airflow.
- Environment: Operate the enclosure in a well-ventilated area, away from direct sunlight, excessive heat, or moisture.
6. Troubleshooting
If you encounter issues with your CENMATE Hard Drive Enclosure, please refer to the following common solutions:
- Drive Not Detected:
- Ensure the power adapter is securely connected and the enclosure is powered on.
- Verify that the USB cable is firmly connected to both the enclosure and your computer.
- Try connecting the enclosure to a different USB port on your computer.
- Check if the hard drive is properly seated in its tray.
- For new drives, ensure they are initialized and formatted in your operating system's Disk Management (Windows) or Disk Utility (Mac).
- Slow Data Transfer:
- Ensure you are connected to a USB 3.0 (or higher) port on your computer. USB 2.0 ports will result in significantly slower speeds.
- Check the health and speed of the installed hard drive(s).
- Avoid running multiple high-bandwidth applications simultaneously during transfers.
- Enclosure Overheating:
- Ensure the enclosure's fan vents are clear of obstructions.
- Operate the device in a well-ventilated area.
If the issue persists, please contact CENMATE technical support as detailed in the "Warranty and Support" section.
7. Specifications
| Feature | Description |
|---|---|
| Model | 2 Bay (802U3-5G) |
| Supported Drives | 2.5" / 3.5" SATA HDD/SSD |
| Max Capacity per Drive | Up to 20TB |
| Total Max Capacity | 40TB (2 x 20TB) |
| Interface | USB 3.0 (USB A/C compatible) |
| Data Transfer Rate | Up to 5Gbps |
| Material | Aluminum Alloy |
| Cooling | Built-in Cooling Fan |
| Dimensions (L x W x H) | 20.2 x 13.2 x 8.8 cm |
| Item Weight | 0.96 kg |
| Compatibility | Windows 7 and above, Mac 9.1 and above, Linux |
| Power Supply | DC 12V Power Adapter |
8. Warranty and Support
CENMATE provides friendly technical support for its products. If you have any questions about the CENMATE Aluminum Dual Bay Hard Drive Enclosure or encounter any issues, please do not hesitate to contact us. We are committed to replying and solving your problem within 24 hours.
For support, please refer to the contact information provided on the official CENMATE website or the product packaging.





