How to recover data from Thecus SY2340 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 SY2340

Thecus SY2340 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from SY2340.

How to recover data from NAS Thecus SY2340

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 software bugs or glitches impact data integrity on NAS Thecus SY2340 devices?

Software bugs or glitches on NAS Thecus SY2340 devices can impact data integrity in several ways:

  1. Data corruption: Bugs or glitches in the software can cause data corruption, where the stored data becomes unreadable or unusable. This can lead to loss of important files or damage to the integrity of the data.
  2. Data loss: In some cases, software bugs or glitches can result in the loss of data stored on the NAS device. This can occur due to improper handling of files, incorrect data synchronization, or other software-related issues.
  3. Inaccurate data backups: NAS devices often have built-in backup features to protect data. However, if there are bugs or glitches in the backup software, it can lead to inaccurate or incomplete backups. This can compromise data integrity and make it difficult to restore data in case of a failure or disaster.
  4. Security vulnerabilities: Software bugs or glitches can also introduce security vulnerabilities in the NAS device. Hackers or malicious actors can exploit these vulnerabilities to gain unauthorized access to the device and manipulate or steal data. This can compromise the integrity and confidentiality of the stored data.
  5. Performance degradation: Some software bugs or glitches can cause performance issues on the NAS device, such as slow file transfers, unresponsive interfaces, or system crashes. These performance problems can impact data integrity by making it difficult to access or modify data reliably.

To mitigate these risks, it is important to regularly update the firmware and software of the NAS device to the latest versions provided by Thecus. Additionally, implementing proper backup strategies, such as regular data backups to external storage or cloud services, can help protect against data loss. Monitoring the device for any unusual behavior or error messages and promptly reporting and addressing any software bugs or glitches to Thecus support can also help maintain data integrity on NAS devices.

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

Although NAS SY2340 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 SY2340. 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

SY2340 has 2 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • 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 SY2340 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 SY2340, feel free to leave a comment!
  • Saul Lunnon
    Saul Lunnon 12.09.2023 22:56 #
    Is it possible to recover data from a NAS Thecus SY2340 device that has been affected by a virus or malware infection?
    • Hetman Software
      Hetman Software 12.09.2023 23:59 #

      Yes, it is possible to recover data from a NAS device that has been affected by a virus or malware infection. However, the process may vary depending on the severity of the infection and the specific steps taken to mitigate it.

      Here are some general steps to recover data from a virus or malware-infected NAS device:

      1. Disconnect the NAS device from the network: This will prevent the virus or malware from spreading further and causing more damage.
      2. Isolate the NAS device: If possible, remove the hard drives from the infected NAS device and connect them to a separate, clean computer. This will allow you to access the data directly from the hard drives without running any potentially infected software on the NAS device itself.
      3. Scan the hard drives for malware: Use an up-to-date antivirus or anti-malware software to scan the hard drives for any infections. Make sure to use a reputable and trusted antivirus software to ensure accurate detection and removal.
      4. Clean the infected files: If the antivirus software detects any infected files, follow its instructions to clean or quarantine them. This will help ensure that the recovered data is free from malware.
      5. Recover the data: Once the infected files have been cleaned or removed, you can proceed to recover the data from the hard drives. This can be done by copying the files to a secure location on a clean computer or by transferring them to a new NAS device.
      6. Reinstall the NAS device: After recovering the data, it is recommended to reinstall the NAS device's operating system and firmware to ensure that any remaining traces of the virus or malware are removed.

      It is important to note that the success of data recovery depends on various factors such as the severity of the infection, the effectiveness of the antivirus software, and the extent of damage caused by the virus or malware. In some cases, it may be necessary to seek professional help from data recovery specialists.

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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 is SSH and what is its significance in network security?

    SSH, which stands for Secure Shell, is a cryptographic network protocol that provides a secure way to access and manage remote systems over an unsecured network. It allows users to securely log into a remote machine or server, execute commands, transfer files, and perform other network services.

    The significance of SSH in network security lies in its ability to establish a secure and encrypted connection between a client and a server. It ensures the confidentiality and integrity of data transmitted over the network, protecting it from eavesdropping, tampering, and other malicious activities.

    Some key features of SSH that contribute to network security are:

    1. Encryption: SSH uses strong encryption algorithms to encrypt all data sent between the client and server, preventing unauthorized access to sensitive information.
    2. Authentication: SSH supports various authentication methods, including passwords, public-key cryptography, and two-factor authentication. This ensures that only authorized users can access the remote system.
    3. Secure File Transfer: SSH includes the Secure File Transfer Protocol (SFTP) and Secure Copy (SCP) protocols, which allow secure file transfers between systems.
    4. Port Forwarding: SSH supports port forwarding, which enables secure tunneling of network connections between local and remote systems. This can be used to protect sensitive services by forwarding them through encrypted SSH connections.
    5. X11 Forwarding: SSH provides X11 forwarding, allowing users to securely run graphical applications on a remote machine and display them locally.

    Overall, SSH plays a crucial role in network security by providing a secure and encrypted communication channel for remote access and management of systems. It helps protect against unauthorized access, data interception, and tampering, ensuring the confidentiality and integrity of network communications.

  • How does the NAS Thecus SY2340 utilize the SSH protocol for remote access and data transmission?

    The NAS Thecus SY2340 utilizes the SSH (Secure Shell) protocol for secure remote access and data transmission. SSH is a cryptographic network protocol that provides a secure channel over an unsecured network. Here's how the NAS Thecus SY2340 utilizes SSH:

    1. Remote Access: The NAS Thecus SY2340 allows users to remotely access and manage the NAS device using SSH. Users can establish an SSH session with the NAS from a remote computer or device. This allows them to execute commands, configure settings, and manage files on the NAS remotely.
    2. Secure Data Transmission: When data is transmitted between the NAS Thecus SY2340 and a remote device over SSH, it is encrypted to ensure confidentiality and integrity. SSH uses encryption algorithms to secure the data, preventing unauthorized access or tampering during transmission.
    3. Authentication: SSH also provides authentication mechanisms to ensure that only authorized users can access the NAS Thecus SY2340 remotely. Users are required to provide valid credentials, such as a username and password or SSH keys, to authenticate themselves before establishing an SSH session with the NAS.
    4. Tunneling: SSH supports tunneling, which allows users to securely transmit data between the NAS and a remote device through an encrypted SSH connection. This can be useful for accessing other services or resources on the NAS, such as web servers or databases, securely over an untrusted network.

    Overall, the NAS Thecus SY2340 leverages the SSH protocol to provide secure remote access and data transmission capabilities, protecting sensitive information and ensuring secure management of the NAS device.

  • Can you explain the benefits and features of SSH as implemented in the Thecus SY2340 NAS device?

    The Thecus SY2340 NAS device implements SSH (Secure Shell) as a secure remote management protocol. Here are some benefits and features of SSH in the Thecus SY2340 NAS device:

    1. Secure Remote Access: SSH provides a secure encrypted connection between a client and the NAS device, ensuring that data transmitted over the network remains confidential.
    2. Command Line Interface (CLI): SSH allows users to access the NAS device's command line interface remotely. This enables advanced users to perform various administrative tasks, configure settings, and execute commands on the NAS device without the need for physical access.
    3. Encryption and Authentication: SSH uses strong encryption algorithms to protect data during transmission. It also supports various authentication methods, including password-based authentication, public key authentication, and two-factor authentication, ensuring secure access to the NAS device.
    4. Secure File Transfer: With SSH, users can securely transfer files between their local machine and the NAS device using tools like SCP (Secure Copy) or SFTP (Secure File Transfer Protocol). This ensures that sensitive data remains protected during file transfers.
    5. Remote Management: SSH allows system administrators to remotely manage the NAS device, even from outside the local network. This simplifies administration tasks, reduces the need for physical access, and enables efficient troubleshooting and configuration changes.
    6. Portability and Compatibility: SSH is a widely adopted protocol and is supported by various operating systems and platforms. This ensures that users can securely access and manage the Thecus SY2340 NAS device from different devices, including Windows, macOS, Linux, and mobile devices.
    7. Audit and Logging: SSH provides logging capabilities, allowing administrators to monitor and track user activity on the NAS device. This helps in auditing and identifying potential security breaches or unauthorized access attempts.

    Overall, the implementation of SSH in the Thecus SY2340 NAS device ensures secure remote management, encrypted data transmission, and convenient access for administrators and advanced users.

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