How to recover data from Thecus N4200 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 N4200

Thecus N4200 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from N4200.

How to recover data from NAS Thecus N4200

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.

How can regular vulnerability assessments and security audits help identify and mitigate potential data loss risks for NAS Thecus N4200 devices?

Regular vulnerability assessments and security audits can help identify and mitigate potential data loss risks for NAS Thecus N4200 devices in the following ways:

  1. Identify vulnerabilities: Vulnerability assessments scan the NAS device for known vulnerabilities in the firmware, operating system, or installed applications. This helps identify any weaknesses that can be exploited by attackers and lead to data loss.
  2. Patch and update management: Security audits ensure that the NAS device is up to date with the latest firmware, operating system, and application patches. Regularly applying patches and updates helps mitigate known vulnerabilities and strengthens the device's security posture.
  3. Configuration review: Security audits can review the NAS device's configuration settings to ensure that they are aligned with security best practices. This includes checking access controls, user permissions, password policies, and network settings. Proper configuration reduces the risk of unauthorized access and data loss.
  4. Access controls and authentication: Vulnerability assessments can evaluate the NAS device's access controls and authentication mechanisms. This includes checking if strong passwords are enforced, two-factor authentication is enabled, and unnecessary user accounts are removed. Strong access controls reduce the risk of unauthorized access and data loss.
  5. Data backup and disaster recovery: Security audits can assess the NAS device's data backup and disaster recovery processes. This includes checking if regular backups are performed, backups are stored offsite, and recovery procedures are tested. Proper backup and recovery mechanisms help mitigate the risk of data loss in case of a security incident.
  6. Network security: Vulnerability assessments can evaluate the network security of the NAS device. This includes checking if firewalls are properly configured, intrusion detection systems are in place, and network traffic is monitored for any suspicious activities. Strengthening network security helps protect the NAS device and mitigate potential data loss risks.
  7. Employee training and awareness: Security audits can assess the level of employee training and awareness regarding data security. This includes checking if employees are educated on best practices, such as avoiding phishing emails, using strong passwords, and reporting suspicious activities. Well-trained employees are less likely to engage in actions that could lead to data loss.

By regularly conducting vulnerability assessments and security audits, organizations can proactively identify and address potential data loss risks for NAS Thecus N4200 devices. This helps ensure the integrity and security of the stored data.

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

Although NAS N4200 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 N4200. 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

N4200 has 4 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • RAID 6;
  • RAID 10;
  • 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 N4200 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 N4200, feel free to leave a comment!
  • Myron Glancey
    Myron Glancey 14.09.2023 11:44 #
    How long does the data recovery process from a NAS Thecus N4200 device usually take?
    • Hetman Software
      Hetman Software 14.09.2023 12:59 #

      The duration of the data recovery process from a NAS device like Thecus N4200 can vary depending on various factors such as the size of the data being recovered, the speed of the NAS device, the complexity of the recovery process, and the condition of the data storage drives.

      In general, the data recovery process can take anywhere from a few hours to several days. For smaller amounts of data or simple recovery tasks, it may be completed within a few hours. However, for larger amounts of data or more complex recovery scenarios, it can take several days or even longer.

      It is important to note that the time taken for data recovery can also depend on the expertise and experience of the person or company performing the recovery process.

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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 does the NAS Thecus N4200 ensure the safety and security of video files stored on its system?

    The NAS Thecus N4200 ensures the safety and security of video files stored on its system through several measures:

    1. RAID Protection: The N4200 supports various RAID levels (RAID 0, 1, 5, 6, 10, and JBOD) which provide data redundancy. This means that even if one or more hard drives fail, the video files can still be accessed and recovered.
    2. Data Encryption: The N4200 supports AES 256-bit encryption, which can be enabled to secure the video files. This ensures that even if someone gains unauthorized access to the NAS, they won't be able to read or access the encrypted video files.
    3. User Access Control: The N4200 allows administrators to set up user accounts and define access permissions. This ensures that only authorized users can access the video files stored on the NAS.
    4. Network Security: The N4200 supports various network security protocols such as SSL/TLS, SSH, and IP blocking. These protocols help protect the NAS from unauthorized access and ensure the security of the video files during transmission over the network.
    5. Backup and Snapshot: The N4200 supports various backup options, including scheduled backups to external storage devices or cloud storage services. It also provides snapshot functionality, allowing users to take point-in-time snapshots of the video files, which can be used for quick recovery in case of accidental deletion or modification.
    6. Antivirus Integration: The N4200 supports integration with antivirus software, which can scan the video files stored on the NAS for any malware or viruses. This helps ensure the safety and integrity of the stored video files.

    Overall, the NAS Thecus N4200 employs a combination of hardware and software features to ensure the safety and security of video files stored on its system, protecting them from data loss, unauthorized access, and malware threats.

  • What are the advantages of using the NAS Thecus N4200 for saving video files compared to other storage solutions?

    The Thecus N4200 NAS (Network Attached Storage) offers several advantages for saving video files compared to other storage solutions:

    1. High storage capacity: The N4200 supports up to four hard drives, allowing for a large amount of storage space. This is beneficial for video files, which can be quite large in size.
    2. RAID support: The NAS supports various RAID configurations, such as RAID 0, 1, 5, 6, and 10. RAID provides data redundancy and improves data protection, ensuring that video files are safe and accessible even in the event of a hard drive failure.
    3. Network accessibility: Being a NAS, the N4200 is designed to be connected to a network, allowing multiple users to access and share video files simultaneously. This is particularly useful in environments where collaboration or remote access is required.
    4. Data backup and synchronization: The NAS offers various backup and synchronization options, allowing users to automatically back up their video files to external drives or cloud storage services. This ensures data redundancy and protection against data loss.
    5. Media streaming capabilities: The N4200 supports media server applications, such as Plex or DLNA, allowing users to stream video files directly to compatible devices like smart TVs, media players, or mobile devices. This makes it convenient to access and enjoy video content from different devices without the need for additional hardware.
    6. Advanced features: The Thecus N4200 includes advanced features like iSCSI target support, which enables the NAS to act as a storage device for virtualized environments. It also supports multiple RAID volumes and hot-swappable drive bays, making it easier to expand storage capacity or replace faulty drives without downtime.

    Overall, the Thecus N4200 NAS provides a reliable and flexible storage solution for video files, offering high capacity, data protection, network accessibility, and various advanced features that cater specifically to the needs of multimedia storage and streaming.

  • Can the NAS Thecus N4200 efficiently handle large video files and provide seamless playback and streaming capabilities?

    The Thecus N4200 is a network-attached storage (NAS) device that is capable of handling large video files and providing seamless playback and streaming capabilities. It is equipped with a powerful Intel Atom processor and up to 2GB of RAM, which allows for efficient processing and handling of large files.

    The N4200 also supports multiple RAID configurations, including RAID 0, 1, 5, 6, 10, and JBOD, which can enhance data protection and performance for video files. Additionally, it supports various multimedia streaming protocols such as DLNA, UPnP, and iTunes server, allowing for seamless playback and streaming of videos to compatible devices.

    However, it is important to note that the actual performance and streaming capabilities of the N4200 may also depend on other factors such as the network infrastructure and the bandwidth available.

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