What is SSH (Secure Shell) and how does it work in the context of network security?

SSH (Secure Shell) is a cryptographic network protocol that allows secure remote login and secure file transfer over an unsecured network. It provides a secure channel between two networked devices, typically a client and a server, allowing them to communicate securely by encrypting all the data transmitted between them.In the context of network security, SSH plays a significant role in ensuring the confidentiality, integrity, and authenticity of network communications. Here's how it works:Encryption: SSH uses encryption algorithms to encrypt all the data transmitted between the client and server. This ensures that even if someone intercepts the data, they cannot understand or modify it without the encryption key.Authentication: SSH provides various authentication methods to verify the identity of the client and server. This prevents unauthorized access to the network. The most common authentication method is using a username and password, but SSH also supports key-based authentication, which is more secure.Secure Channel: SSH establishes a secure channel between the client and server, protecting the data from eavesdropping and tampering. The secure channel also prevents attackers from injecting malicious code or exploiting vulnerabilities in the network.Port Forwarding: SSH allows port forwarding, which enables the secure transmission of data between different networked devices. This feature is particularly useful for accessing resources on a remote network securely, as it encrypts the data while it traverses the unsecured network.Overall, SSH enhances network security by providing secure remote access and data transfer capabilities, protecting sensitive information from unauthorized access and ensuring the integrity of network communications.

How does the NAS Raidon DT8M-U6-B utilize SSH protocol for secure remote access and file transfer?

The NAS Raidon DT8M-U6-B utilizes the SSH (Secure Shell) protocol for secure remote access and file transfer by implementing SSH server functionality.SSH is a cryptographic network protocol that allows secure communication over an unsecured network. It provides a secure channel for remote login and command execution, as well as secure file transfer.In the case of the NAS Raidon DT8M-U6-B, when the SSH server is enabled on the device, it allows users to remotely access the NAS system using SSH client software, such as PuTTY or OpenSSH.To establish a secure remote connection, the SSH server on the NAS uses encryption algorithms to secure the communication between the client and the server. This ensures that the data transmitted over the network is protected from eavesdropping and tampering.Once the SSH connection is established, users can remotely execute commands on the NAS and manage the device as if they were physically present. They can also securely transfer files to and from the NAS using SSH's built-in file transfer capabilities.The NAS Raidon DT8M-U6-B utilizes the SSH protocol to provide a secure and encrypted method for remote access and file transfer, ensuring the confidentiality and integrity of the data transmitted over the network.

Can you explain the advantages and features of SSH protocol in the context of NAS Raidon DT8M-U6-B and its impact on data security and management?

The SSH (Secure Shell) protocol offers several advantages and features when it comes to NAS (Network Attached Storage) devices like the Raidon DT8M-U6-B, particularly in terms of data security and management. Here are some key points:Secure Remote Access: SSH provides a secure method for remote access to the NAS device. It establishes an encrypted connection between the client and the server, ensuring that data transmitted over the network cannot be intercepted or tampered with by unauthorized parties.Authentication: SSH uses various authentication methods, including password-based authentication, public key authentication, and certificate-based authentication. These mechanisms ensure that only authorized users can access the NAS device, protecting it from unauthorized access.Data Encryption: SSH encrypts all data transmitted between the client and the server, including file transfers, commands, and administrative tasks. This encryption prevents eavesdropping and protects sensitive information from being compromised.Secure File Transfer: SSH supports secure file transfer protocols like SFTP (SSH File Transfer Protocol) and SCP (Secure Copy Protocol). These protocols allow users to securely transfer files to and from the NAS device, ensuring the integrity and confidentiality of the data being transferred.Secure Shell Access: SSH provides a command-line interface for managing the NAS device remotely. This allows administrators to execute commands, configure settings, and perform various administrative tasks securely, without the need for physical access to the device.Port Forwarding: SSH supports port forwarding, which enables users to securely access services running on the NAS device from remote locations. It allows services such as web servers, FTP servers, or database servers to be accessed securely through an encrypted SSH tunnel.Two-Factor Authentication: SSH can be configured to use two-factor authentication, adding an extra layer of security. This involves combining a password or key-based authentication with an additional authentication method like a one-time password (OTP) generated by a mobile app or a hardware token.In the context of the NAS Raidon DT8M-U6-B, SSH provides robust security measures for remote access, file transfer, and administrative tasks. It ensures that data stored on the NAS device remains secure during transmission and protects against unauthorized access. SSH also enables efficient management of the device, allowing administrators to perform tasks remotely and securely.

Expert Techniques for Recovering NAS Raidon DT8M-U6-B Data from RAID Arrays

Name: How to recover data from a Raidon
Uploaded: 2025-10-16T08:53:56+03:00
Description: How to recover data from a Raidon

Has your NAS Raidon DT8M-U6-B suddenly lost its network drive and you’re unsure what to do next? Did the RAID array collapse, making your files inaccessible? Is the device throwing errors during startup? Perhaps you accidentally rebuilt the RAID array or several hard drives failed at the same time?

Expert Techniques for Recovering NAS Raidon DT8M-U6-B Data from RAID Arrays

Data Recovery Tool

Raidon DT8M-U6-B NAS Data Recovery in 2025

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from an DT8M-U6-B. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Contents

Why Regular Data Recovery Tools Can’t Restore Files from RAID
Key Information About the NAS Raidon DT8M-U6-B
How to Remove Hard Disks from Your NAS and Connect Them to a PC

RAID Recovery™ 2.8

Recover data from damaged RAID arrays inaccessible from a computer.

Download

Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like Raidon often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

Can insufficient power supply or voltage fluctuations cause data loss on NAS Raidon DT8M-U6-B devices?

Insufficient power supply or voltage fluctuations can potentially cause data loss on NAS Raidon DT8M-U6-B devices. NAS devices, like the Raidon DT8M-U6-B, contain multiple hard drives that are configured in a RAID array to provide data redundancy and protection against drive failures.

However, power supply issues can disrupt the normal operation of the NAS device and potentially lead to data loss or corruption. Insufficient power supply can cause the NAS to shut down unexpectedly, resulting in data being written improperly or not at all. Voltage fluctuations can also cause damage to the internal components of the NAS, including the hard drives, which can lead to data loss.

To mitigate the risk of data loss caused by power supply issues, it is recommended to use a reliable and stable power source, such as a UPS (Uninterruptible Power Supply), which can provide a consistent power supply and protect against voltage fluctuations. Additionally, regularly backing up the data stored on the NAS to an external storage device or cloud service is crucial to ensure data integrity and recovery in case of any unforeseen issues.

How to Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS DT8M-U6-B can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

Power off the NAS and disconnect it from the power source.

WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.
Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.
Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.
Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

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How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with Raidon DT8M-U6-B. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

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How to recover data from a Raidon

DT8M-U6-B has 8 HDD slots, and it supports the following array types:

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

NAS supports:

APFS / HFS+;
Ext2 / Ext3 / Ext4;

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

Overwriting during the recovery process;
Additional data loss caused by bad sectors;
User errors.

To create a disk image, follow these steps:

Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.
In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.
When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.
Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

Where Are the User’s Files Actually Stored?

The Raidon DT8M-U6-B 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.

RAID Recovery Software: Detailed Comparison

Product	Operating system	RAID controller support	Supported file systems	Virtual RAID controller support	Data recovery from damaged RAID	File preview
Hetman RAID Recovery	Windows, Linux, MacOS	Yes, over 100 controllers	FAT, exFAT, NTFS, ReFS, APFS, HFS+, Ext4, Ext3, Ext2, ReiserFS, Btrfs, VMFS, Hikvision, XFS, UFS, ZFS	Yes	Yes	Yes
DiskInternals RAID Recovery	Windows	Yes, over 10 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
R-Studio	Windows, Mac, Linux	Yes, over 20 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
UFS Explorer RAID Recovery	Windows, Mac, Linux	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes
EaseUS Data Recovery	Windows	Yes, over 20 controllers	FAT, NTFS, Ext2/3/4, HFS+	No	Yes	Yes
ReclaiMe Free RAID Recovery	Windows	Yes, over 100 controllers	FAT, NTFS, Ext2/3/4, HFS+	Yes	Yes	Yes

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We will be happy to answer your questions!

Comments (3)

Hetman Software: Data Recovery 9.08.2022 12:31 #

If you want to ask a question about data recovery, from NAS DT8M-U6-B, feel free to leave a comment!

Reply
Henry Addinall 3.09.2023 23:52 #

Are there any specific encryption methods used in NAS Raidon DT8M-U6-B devices that may affect data recovery?

Reply
- Hetman Software 4.09.2023 00:01 #
  The NAS Raidon DT8M-U6-B device does not specify any specific encryption methods used for data storage. It is important to note that encryption is not typically a feature of NAS devices, as their primary purpose is to provide network storage and file sharing capabilities.
  However, if you have enabled encryption on the device or if it supports encryption as a feature, it may affect data recovery in the following ways:
  Data Recovery Difficulty: Encryption adds an additional layer of security to the data stored on the NAS device. If the encryption is strong and properly implemented, it can significantly increase the difficulty of recovering data without the encryption key. Without the key, the data may be effectively inaccessible.
  Recovery Time: If the encryption is enabled and the key is lost or forgotten, data recovery can become a time-consuming process. Depending on the encryption algorithm and key length, attempting to decrypt the data without the key could take an impractical amount of time or even be impossible.
  Data Integrity: If the NAS device uses encryption, it may also use integrity checks or checksums to ensure the data's integrity. These checks can prevent unauthorized modifications to the data. While this is beneficial for security, it can complicate data recovery if the integrity checks fail or if the encryption key is unavailable.
  To determine if encryption is utilized in your specific NAS Raidon DT8M-U6-B device and how it may affect data recovery, it is recommended to consult the device's documentation or contact the manufacturer directly.
  Reply

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Updated:
16.10.2025 8:53

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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.

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 xaker.ru, 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 (Secure Shell) and how does it work in the context of network security?
SSH (Secure Shell) is a cryptographic network protocol that allows secure remote login and secure file transfer over an unsecured network. It provides a secure channel between two networked devices, typically a client and a server, allowing them to communicate securely by encrypting all the data transmitted between them.
In the context of network security, SSH plays a significant role in ensuring the confidentiality, integrity, and authenticity of network communications. Here's how it works:
1. Encryption: SSH uses encryption algorithms to encrypt all the data transmitted between the client and server. This ensures that even if someone intercepts the data, they cannot understand or modify it without the encryption key.
2. Authentication: SSH provides various authentication methods to verify the identity of the client and server. This prevents unauthorized access to the network. The most common authentication method is using a username and password, but SSH also supports key-based authentication, which is more secure.
3. Secure Channel: SSH establishes a secure channel between the client and server, protecting the data from eavesdropping and tampering. The secure channel also prevents attackers from injecting malicious code or exploiting vulnerabilities in the network.
4. Port Forwarding: SSH allows port forwarding, which enables the secure transmission of data between different networked devices. This feature is particularly useful for accessing resources on a remote network securely, as it encrypts the data while it traverses the unsecured network.
Overall, SSH enhances network security by providing secure remote access and data transfer capabilities, protecting sensitive information from unauthorized access and ensuring the integrity of network communications.
How does the NAS Raidon DT8M-U6-B utilize SSH protocol for secure remote access and file transfer?

The NAS Raidon DT8M-U6-B utilizes the SSH (Secure Shell) protocol for secure remote access and file transfer by implementing SSH server functionality.
SSH is a cryptographic network protocol that allows secure communication over an unsecured network. It provides a secure channel for remote login and command execution, as well as secure file transfer.
In the case of the NAS Raidon DT8M-U6-B, when the SSH server is enabled on the device, it allows users to remotely access the NAS system using SSH client software, such as PuTTY or OpenSSH.
To establish a secure remote connection, the SSH server on the NAS uses encryption algorithms to secure the communication between the client and the server. This ensures that the data transmitted over the network is protected from eavesdropping and tampering.
Once the SSH connection is established, users can remotely execute commands on the NAS and manage the device as if they were physically present. They can also securely transfer files to and from the NAS using SSH's built-in file transfer capabilities.
The NAS Raidon DT8M-U6-B utilizes the SSH protocol to provide a secure and encrypted method for remote access and file transfer, ensuring the confidentiality and integrity of the data transmitted over the network.
Can you explain the advantages and features of SSH protocol in the context of NAS Raidon DT8M-U6-B and its impact on data security and management?
The SSH (Secure Shell) protocol offers several advantages and features when it comes to NAS (Network Attached Storage) devices like the Raidon DT8M-U6-B, particularly in terms of data security and management. Here are some key points:
1. Secure Remote Access: SSH provides a secure method for remote access to the NAS device. It establishes an encrypted connection between the client and the server, ensuring that data transmitted over the network cannot be intercepted or tampered with by unauthorized parties.
2. Authentication: SSH uses various authentication methods, including password-based authentication, public key authentication, and certificate-based authentication. These mechanisms ensure that only authorized users can access the NAS device, protecting it from unauthorized access.
3. Data Encryption: SSH encrypts all data transmitted between the client and the server, including file transfers, commands, and administrative tasks. This encryption prevents eavesdropping and protects sensitive information from being compromised.
4. Secure File Transfer: SSH supports secure file transfer protocols like SFTP (SSH File Transfer Protocol) and SCP (Secure Copy Protocol). These protocols allow users to securely transfer files to and from the NAS device, ensuring the integrity and confidentiality of the data being transferred.
5. Secure Shell Access: SSH provides a command-line interface for managing the NAS device remotely. This allows administrators to execute commands, configure settings, and perform various administrative tasks securely, without the need for physical access to the device.
6. Port Forwarding: SSH supports port forwarding, which enables users to securely access services running on the NAS device from remote locations. It allows services such as web servers, FTP servers, or database servers to be accessed securely through an encrypted SSH tunnel.
7. Two-Factor Authentication: SSH can be configured to use two-factor authentication, adding an extra layer of security. This involves combining a password or key-based authentication with an additional authentication method like a one-time password (OTP) generated by a mobile app or a hardware token.
In the context of the NAS Raidon DT8M-U6-B, SSH provides robust security measures for remote access, file transfer, and administrative tasks. It ensures that data stored on the NAS device remains secure during transmission and protects against unauthorized access. SSH also enables efficient management of the device, allowing administrators to perform tasks remotely and securely.