How to recover data from Thecus N4100+ 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 Thecus N4100+

Thecus N4100+ NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from N4100+.

How to recover data from NAS Thecus N4100+

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 Thecus also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

Can the type of file system used on NAS Thecus N4100+ devices affect data loss risks?

Yes, the type of file system used on NAS Thecus N4100+ devices can affect data loss risks. Different file systems have different features and capabilities, which can impact the reliability and data protection measures of the NAS device.

For example, some file systems like ZFS and Btrfs offer advanced data protection features such as data checksumming, automatic error correction, and snapshot capabilities. These features can help detect and correct data corruption or loss issues, reducing the risk of data loss.

On the other hand, file systems like FAT32 or NTFS may not have built-in data protection mechanisms, making them more susceptible to data loss in case of hardware or software failures.

Additionally, the file system used can also affect the overall performance and scalability of the NAS device, which indirectly impacts the risk of data loss. A poorly designed or inefficient file system may increase the chances of data corruption or loss during high workloads or system failures.

Therefore, it is important to choose a reliable and robust file system that suits your specific needs and provides adequate data protection measures to minimize the risk of data loss on NAS Thecus N4100+ devices.

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

Although NAS N4100+ 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 Thecus N4100+. 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 Thecus

How to recover data from a Thecus

N4100+ has 4 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • JBOD;

NAS supports:

  • EXT3;
  • EXT4;
  • XFS;

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 Thecus N4100+ 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 N4100+, feel free to leave a comment!
  • Xander Colbeck
    Xander Colbeck 14.09.2023 17:42 #
    Can data recovery from a NAS Thecus N4100+ device be done if the device is not powering on?
    • Hetman Software
      Hetman Software 14.09.2023 17:59 #

      If the NAS device is not powering on, it may be challenging to recover data directly from the device itself. However, there are a few possible options to consider:

      1. Check the power supply: Ensure that the power supply is functioning correctly by testing it with a multimeter or trying a different power supply if available. Sometimes, a faulty power supply can prevent the device from powering on.
      2. Remove the hard drives: If the power supply is not the issue, you can try removing the hard drives from the NAS device and connecting them to a computer directly. This can be done by using a SATA-to-USB adapter or by installing the drives into a compatible computer. Once connected, you can attempt data recovery using specialized software or seek professional assistance.
      3. Contact professional data recovery services: If the above methods do not work or if you are not comfortable attempting data recovery yourself, it is advisable to contact professional data recovery services. They have the expertise and specialized tools to recover data from faulty NAS devices, even if they are not powering on.

      Remember, data recovery can be a complex process, and it is crucial to handle the situation carefully to avoid further data loss.

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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

  • What are the necessary steps to physically set up a Thecus N4100+ NAS at home?

    Setting up a Thecus N4100+ NAS at home involves several steps. Here are the necessary steps to physically set up the NAS:

    1. Unboxing: Start by unboxing the Thecus N4100+ NAS and ensure that all the components are included in the package, such as the NAS unit, power adapter, Ethernet cable, and any additional accessories.
    2. Placement: Choose an appropriate location to place the NAS. It should be a well-ventilated area with enough space around it for proper airflow. Avoid placing it near heat sources or in direct sunlight.
    3. Power Connection: Connect the power adapter to the NAS and plug it into a power outlet. Ensure that the power source is stable and reliable.
    4. Network Connection: Connect one end of the Ethernet cable to the LAN port on the NAS and the other end to your home router or switch. This will establish a network connection for the NAS.
    5. Hard Drive Installation: The Thecus N4100+ NAS supports up to four hard drives. Open the NAS casing and install the desired hard drives into the drive bays. Ensure that the hard drives are securely connected to the NAS.
    6. RAID Configuration: If you plan to use RAID for data redundancy or performance, configure the RAID level using the NAS's web interface. Follow the manufacturer's instructions to set up the desired RAID configuration.
    7. Power On: Once all the connections are made and the hard drives are installed, power on the NAS by pressing the power button. Wait for the NAS to boot up, which may take a few minutes.
    8. Software Setup: Access the NAS's web interface by entering its IP address in a web browser. Follow the on-screen instructions to set up the NAS, including network settings, user accounts, and shared folders. Configure any additional settings according to your requirements.
    9. Data Backup and Access: Once the NAS is set up, you can start backing up and accessing your data. Use the provided software or configure network shares to access the NAS from your computers, smartphones, or other devices.

    It is important to refer to the manufacturer's documentation and user manual for detailed instructions specific to the Thecus N4100+ NAS model.

  • How do I configure the network settings on the Thecus N4100+ NAS to ensure proper connectivity?

    To configure the network settings on the Thecus N4100+ NAS, follow these steps:

    1. Connect the NAS to your network using an Ethernet cable.
    2. Power on the NAS and wait for it to boot up.
    3. Open a web browser on a computer connected to the same network.
    4. Enter the IP address of the NAS in the browser's address bar. The default IP address is usually "" or "". Consult the NAS documentation if unsure.
    5. Press Enter to access the NAS web interface.
    6. Login to the NAS using the admin username and password. The default username is "admin", and the default password is "admin" as well.
    7. Once logged in, click on "Network" or "Network Settings" in the web interface.
    8. Here, you can configure the network settings of the NAS, including the IP address, subnet mask, gateway, and DNS servers.
    9. Choose the appropriate settings based on your network configuration. If you are unsure, consult your network administrator or Internet Service Provider (ISP) for the correct values.
    10. After entering the network settings, click on "Apply" or "Save" to save the changes.
    11. The NAS will apply the new network settings, and you may need to wait a few moments for the changes to take effect.
    12. Once the network settings are configured, you should have proper connectivity on the Thecus N4100+ NAS.

    Note: It is recommended to consult the NAS documentation or contact Thecus support for specific guidance on configuring network settings for your particular model.

  • What are the recommended security measures and user settings to consider when setting up a Thecus N4100+ NAS at home?

    When setting up a Thecus N4100+ NAS at home, it is important to consider several security measures and user settings to ensure the safety and privacy of your data. Here are some recommended steps:

    1. Change the default admin password: The first step is to change the default admin password to a strong and unique one. This will prevent unauthorized access to the NAS.
    2. Enable firewall and network security: Thecus N4100+ NAS comes with a built-in firewall. Ensure that the firewall is enabled to protect against unauthorized access. Additionally, configure your home router's firewall to only allow necessary ports for accessing the NAS.
    3. Regularly update firmware and software: Keep the NAS firmware and all installed applications up to date. Manufacturers release updates to fix vulnerabilities and improve security. Regularly check for updates and apply them.
    4. Use strong user passwords: Create strong passwords for all user accounts on the NAS. Use a combination of uppercase and lowercase letters, numbers, and symbols. Avoid using common or easily guessable passwords.
    5. Enable network encryption: Enable network encryption protocols like SSL/TLS for secure data transmission between the NAS and connected devices. This ensures that data cannot be intercepted or tampered with during transmission.
    6. Disable unnecessary services: Disable any unnecessary services or protocols that you do not require. This reduces the attack surface and minimizes potential vulnerabilities.
    7. Implement user access controls: Set up user access controls and permissions to limit access to specific folders or files. Only grant necessary privileges to users to avoid unauthorized access.
    8. Enable two-factor authentication (2FA): Thecus N4100+ supports 2FA. Enable this feature to add an extra layer of security. With 2FA, users will need to provide a second verification factor, such as a code from a mobile app, in addition to their password.
    9. Regularly backup your data: Implement a regular backup strategy to protect your data in case of hardware failure, accidental deletion, or ransomware attacks. Consider using an external hard drive or cloud storage for backups.
    10. Monitor and review logs: Regularly review the NAS logs for any suspicious activities or unauthorized access attempts. Monitoring the logs can help identify potential security issues and take appropriate action.

    Remember, security is an ongoing process, and it is essential to stay updated with the latest security practices and recommendations from Thecus or other security experts.

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