How to recover data from TerraMaster T12-423 NAS

Is your network drive gone, and you are wondering what to do? Has a RAID system crashed, and your files are no longer accessible? Does your device display an error while booting? Have you accidentally rebuilt your RAID system? Are several hard disks out of order?

How to recover data from NAS TerraMaster T12-423

TerraMaster T12-423 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from T12-423.

How to recover data from NAS TerraMaster T12-423

Recover data from damaged RAID arrays inaccessible from a computer.

Why can’t ordinary software tools restore files from RAID?

Conventional hard disks keep user’s data by writing it to their surface in a consecutive way, and this is how an entire file is stored on a single hard disk. However, when data is written to a RAID system, a file is divided into several parts. Then these parts are written consecutively to all hard disks within such array. The size of such parts may range from 2 KB to 2 MB, so each file is stored on several hard disks at the same time.

Such approach helps to speed up read and write operations, and it is evident that saving two parts of a file having the size of 1 GB to two hard disks simultaneously is much faster than saving the same 1 GB of data to one hard disk. However, this peculiarity makes file recovery more complicated.

Various RAID levels store information in different ways. Additionally, manufacturers like TerraMaster also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

Are there any known limitations or issues related to specific NAS TerraMaster T12-423 device models that can lead to data loss?

While I couldn't find any specific limitations or issues related to the NAS TerraMaster T12-423 device models that can lead to data loss, it's important to note that data loss can occur in any storage device under certain circumstances. Here are some general considerations to keep in mind:

  1. Hardware Failure: Like any electronic device, hard drives can fail over time due to various factors such as mechanical issues, power surges, or manufacturing defects. Regular backups and redundancy measures can help mitigate the risk of data loss.
  2. User Error: Accidental deletion, formatting the wrong drive, or improper configuration can result in data loss. It's crucial to exercise caution and double-check actions when managing data on a NAS device.
  3. Software or Firmware Issues: Bugs, compatibility problems, or outdated firmware can potentially lead to data loss. Keeping the device's firmware up to date and regularly checking for software updates can help prevent such issues.
  4. Network Vulnerabilities: NAS devices are connected to the network, making them potential targets for cyberattacks. Ensuring that the device's security features are properly configured, using strong passwords, and keeping the network secure can help protect against data loss due to unauthorized access.
  5. Environmental Factors: Environmental hazards like fire, flood, or extreme temperatures can damage the NAS device and result in data loss. Storing the device in a safe and controlled environment can minimize these risks.

It's always recommended to have a backup strategy in place, such as maintaining multiple copies of important data on different storage devices or utilizing cloud storage services.

How to take hard disks out of the NAS and connect them to a PC?

Although NAS T12-423 can be accessed over the network, you still need to take the hard disks out of the storage device and connect them to a Windows computer. Only in this case will the software be able to scan them properly. Here is what you should do:

  1. Turn off the storage and disconnect it from the power supply.

    WARNING! Before you start taking hard disks out of your NAS device, read the manual carefully. Incorrect actions may damage your network-attached storage and/or the hard disks within the RAID system.

  2. Take the hard disks out of the NAS one by one, carefully removing them from their slots. Remember that the disks are extremely vulnerable: hitting or dropping them may result in serious physical damage.

  3. Make sure to mark each hard disk in accordance with how they were installed inside the NAS.

  4. Remove the hard disks and connect them to the computer. In this video, we have explored what ports are used to connect hard disks, and what to do if there are not enough ports or connectors.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Restoring data with Hetman RAID Recovery

Hetman Raid Recovery

This program recovers data from damaged RAID arrays and is fully compatible with TerraMaster T12-423. The hard disks that make up the RAID contain technical information about the algorithm used to save files. When launched, Hetman RAID Recovery reads this information and puts the damaged array together. Then you can open the disk and save your files. Also, you can recover the files accidentally deleted from the network drive.

Go to view
How to recover data from a TerraMaster

How to recover data from a TerraMaster

T12-423 has 12 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • RAID 6;
  • RAID 50;
  • RAID 60;
  • JBOD;

NAS supports:

  • Ext2;
  • Ext3;
  • Ext4;
  • Btrfs;

Safe recovery from disk images

This utility lets you save an entire copy of the disk to file and then work with this image instead of the actual disk. Such feature helps to protect data on the disk from:

  • Overwriting during the recovery process;
  • Loss resulting from bad sectors;
  • User mistakes.

To create an image, do the following:

  1. Make sure that you have enough free space to save the image. The image file size usually equals the disk size.

  2. Select the disk in the main window, and choose from the menu ToolsSave Disk. You can select multiple disks to be saved.

  3. When the image creation wizard starts, you can choose to save the entire disk or select only a part of it. Specify the parameters and click Next.

    Hetman Raid Recovery: Image Creation Wizard
  4. At this stage, you need to choose a directory where to save the image. Choose any disk connected to this PC, or save the image by FTP.

    Hetman Raid Recovery: hoose any disk connected to this PC, or save the image by FTP

Where are user’s files stored?

The TerraMaster T12-423 network-attached storage keeps OS Linux operating system files on a separate RAID 1 (mirrored) array. Usually, all NAS systems create several volumes on every hard disk, and the first of them takes up to 2 Gb of space. This is where operating system files are stored. Other volumes are united into a RAID array where user’s data is written.

Comparison of software for RAID recovery

Product Operating system License type RAID controller support Supported file systems Virtual RAID controller support Data recovery from damaged RAID File preview
Hetman RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
DiskInternals RAID Recovery Windows Paid Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
R-Studio Windows, Mac, Linux Paid Yes, over 200 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
UFS Explorer RAID Recovery Windows, Mac, Linux Paid Yes, over 1,000 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
EaseUS Data Recovery Windows Paid Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
ReclaiMe Free RAID Recovery Windows Free Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes


We will be happy to answer your questions!

Comments (3)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 9.08.2022 12:31 #
    If you want to ask a question about data recovery, from NAS T12-423, feel free to leave a comment!
  • Max Fleay
    Max Fleay 10.09.2023 08:47 #
    Can data recovery from a NAS TerraMaster T12-423 device be done if the device is not responding or freezing frequently?
    • Hetman Software
      Hetman Software 10.09.2023 09:02 #

      If your NAS TerraMaster T12-423 device is not responding or freezing frequently, it can make data recovery more challenging but not impossible. Here are a few steps you can take to attempt data recovery:

      1. Check the physical connections: Ensure that all cables and connections are secure and functioning properly. Faulty connections can cause the device to freeze or become unresponsive.
      2. Restart the device: Try restarting the NAS device to see if it resolves the freezing issue. Sometimes, a simple reboot can fix temporary glitches.
      3. Update firmware: Check if there are any firmware updates available for your TerraMaster T12-423 device. Updating the firmware can address known issues and improve device performance.
      4. Use different network cables and ports: If the freezing issue persists, try connecting the NAS device to a different network port or using a different network cable. Faulty cables or ports can cause communication issues.
      5. Connect the hard drives to a different system: If the freezing issue continues, you can try removing the hard drives from the NAS device and connecting them to a different system. This can be done using a SATA-to-USB adapter or by installing the drives directly into another compatible NAS or computer. If the drives are accessible on the new system, you can attempt data recovery from there.
      6. Seek professional help: If none of the above steps work, it is recommended to contact a professional data recovery service. They have specialized tools and expertise to recover data from unresponsive or damaged NAS devices. However, professional data recovery services can be costly.

      Remember to always consult the manufacturer's documentation and support resources for specific troubleshooting steps related to your TerraMaster T12-423 device.

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Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • How can I check for and install software updates on my TerraMaster T12-423 NAS device?

    To check for and install software updates on your TerraMaster T12-423 NAS device, follow these steps:

    1. Open a web browser on your computer and enter the IP address of your TerraMaster NAS device. You can find the IP address by checking your router's connected devices list or using a network scanning tool.
    2. Enter your login credentials (username and password) to access the TerraMaster NAS web interface.
    3. Once logged in, navigate to the "Control Panel" or "System Settings" section. The exact location may vary depending on the firmware version.
    4. Look for an option related to "Firmware Update" or "Software Update." Click on it to proceed.
    5. The system will check for available updates. If an update is found, you will be prompted to download and install it. Follow the on-screen instructions to complete the update process. It is recommended to back up your data before proceeding with the update.
    6. Wait for the update to finish installing. The NAS device may reboot during the process.
    7. After the update is complete, log in again to the web interface and verify that the firmware version has been updated.

    Note: It is important to regularly check for software updates on your TerraMaster NAS device to ensure you have the latest features, bug fixes, and security patches.

  • What are the benefits of regularly updating the software on my TerraMaster T12-423 NAS?

    Regularly updating the software on your TerraMaster T12-423 NAS offers several benefits:

    1. Security patches: Software updates often include security patches that fix vulnerabilities and protect your NAS from potential cyber threats. Regularly updating the software ensures that your NAS remains secure and your data is safe from attacks.
    2. Bug fixes: Updates often include bug fixes that address any known issues or glitches in the software. This helps improve the overall performance and stability of your NAS, ensuring a smooth and reliable user experience.
    3. New features and enhancements: Software updates may introduce new features, functionalities, or improvements to existing ones. By updating your NAS, you can take advantage of these enhancements and enjoy an enhanced user experience with additional capabilities.
    4. Compatibility: Updates can address compatibility issues with other devices, operating systems, or applications. By keeping your NAS software up to date, you ensure that it remains compatible with the latest hardware and software technologies, allowing for seamless integration and usage.
    5. Performance optimization: Software updates often include performance optimizations that can improve the speed, efficiency, and responsiveness of your NAS. These optimizations can enhance file transfer speeds, reduce latency, and overall improve the performance of your NAS.
    6. Extended device lifespan: Regular software updates ensure that your NAS remains supported by the manufacturer. This extends the device's lifespan as it continues to receive updates, ensuring compatibility with future technologies and maintaining its usefulness over time.

    It is important to note that before updating the software on your TerraMaster T12-423 NAS, it is recommended to back up your data to avoid any potential data loss during the update process.

  • Are there any precautions or considerations I should take before performing a software update on my TerraMaster T12-423 NAS?

    Before performing a software update on your TerraMaster T12-423 NAS, it is important to take certain precautions and considerations to ensure a smooth and successful update process. Here are some steps to follow:

    1. Backup your data: Before starting the update process, it is crucial to back up all your important data. Although software updates are generally safe, there is always a small risk of data loss or corruption during the update process. Having a backup ensures that you can recover your data if anything goes wrong.
    2. Check compatibility: Verify that the software update you are planning to install is compatible with your specific TerraMaster T12-423 NAS model. Check the manufacturer's website or support documentation for compatibility information. Using an incompatible update can lead to system instability or malfunction.
    3. Read release notes: Carefully read the release notes or changelog provided by TerraMaster for the software update. This will give you insights into the changes, bug fixes, and new features introduced with the update. It is essential to be aware of any potential issues or limitations that might affect your usage or workflow.
    4. Stable network connection: Ensure that your NAS device has a stable network connection during the update process. A sudden interruption in the network connection can cause the update to fail or corrupt the system. Consider using a wired Ethernet connection instead of a wireless connection for better stability.
    5. Sufficient power supply: Make sure your TerraMaster NAS has a stable power supply throughout the update process. A sudden power outage or fluctuation can cause the update to fail and potentially damage the device. Consider connecting your NAS to an uninterruptible power supply (UPS) to avoid power-related issues.
    6. Update during non-peak hours: It is advisable to perform the software update during non-peak hours when the NAS is not heavily utilized. This reduces the risk of any disruption to ongoing operations or data access.
    7. Follow the update instructions: Carefully follow the instructions provided by TerraMaster for performing the software update. These instructions may include steps like downloading the update file, accessing the NAS's web interface, and initiating the update process. Following the instructions accurately minimizes the chances of errors or complications.
    8. Patience: During the update process, it is essential to remain patient and avoid interrupting or restarting the NAS. Updates can take some time to complete, and interrupting the process can lead to system instability or failure.

    By following these precautions and considerations, you can help ensure a successful software update on your TerraMaster T12-423 NAS while minimizing the risk of data loss or system issues.

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