What is SSH and how does it work as a secure protocol for remote access to a server?

SSH (Secure Shell) is a cryptographic network protocol that allows secure remote access and control of a server over an unsecured network. It provides a secure channel for communication between the client and the server, ensuring confidentiality, integrity, and authenticity of the data transmitted.Here's how SSH works as a secure protocol for remote access:Encryption: SSH uses encryption algorithms to secure the communication between the client and the server. It encrypts all the data, including passwords, commands, and responses, preventing unauthorized access to sensitive information.Authentication: SSH employs various authentication methods to verify the identity of the client before granting access to the server. The most common method is public-key cryptography, where the client generates a key pair (public and private key). The client's public key is stored on the server, and during the SSH handshake, the client proves its identity by signing a challenge with its private key.Key Exchange: SSH uses a key exchange algorithm to securely establish a session key between the client and the server. This session key is used to encrypt the data transmitted during the SSH session. The key exchange process ensures that even if an attacker intercepts the communication, they cannot decrypt the data without the session key.Port Forwarding: SSH allows port forwarding, which enables the client to securely access services on the server's network. It creates an encrypted tunnel between the client and the server, forwarding specific ports from the server to the client's machine. This allows the client to access services as if they were running on their local machine.Secure File Transfer: SSH includes secure file transfer capabilities through tools like SCP (Secure Copy) and SFTP (SSH File Transfer Protocol). These tools allow users to securely transfer files between the client and the server, ensuring data integrity and confidentiality.Overall, SSH provides a secure and encrypted channel for remote access to a server, protecting sensitive data from eavesdropping, tampering, and unauthorized access.

How does the Lenovo ThinkSystem SR670 Rack Server utilize SSH for secure management and administration purposes?

The Lenovo ThinkSystem SR670 Rack Server utilizes SSH (Secure Shell) for secure management and administration purposes by providing a secure encrypted channel for remote access and communication. SSH allows system administrators to securely connect to the server remotely and perform various management and administrative tasks. It provides a secure alternative to traditional remote login protocols like Telnet, as it encrypts the communication between the client and the server, protecting sensitive information such as passwords and commands from being intercepted.The ThinkSystem SR670 Rack Server supports SSH as a standard feature, allowing administrators to establish a secure connection to the server using SSH clients such as PuTTY or OpenSSH. Once connected, administrators can remotely execute commands, configure settings, and manage the server's resources without the need for physical access.By utilizing SSH, the ThinkSystem SR670 Rack Server ensures that the management and administration of the server are performed securely, protecting sensitive data and preventing unauthorized access to the server.

Can you explain the advantages and benefits of using SSH on the Lenovo ThinkSystem SR670 Rack Server compared to other remote access protocols?

Using SSH (Secure Shell) on the Lenovo ThinkSystem SR670 Rack Server offers several advantages and benefits over other remote access protocols:Enhanced security: SSH provides strong encryption and authentication mechanisms, ensuring secure remote access to the server. It encrypts all communication between the client and the server, protecting sensitive data from eavesdropping and unauthorized access.Authentication options: SSH supports various authentication methods, including password-based authentication, public key authentication, and two-factor authentication. This flexibility allows users to choose the most secure and convenient authentication method based on their requirements.Portability: SSH is a widely supported protocol and is available on most operating systems, including Windows, macOS, and Linux. This portability enables users to access the Lenovo ThinkSystem SR670 Rack Server from different client devices and operating systems without any compatibility issues.Remote command execution: SSH allows users to execute commands on the remote server, providing a convenient way to manage and administer the server remotely. This capability is particularly useful for system administrators who need to perform tasks on the server without physical access.File transfer capabilities: SSH includes secure file transfer protocols, such as SCP (Secure Copy) and SFTP (SSH File Transfer Protocol), which enable users to securely transfer files between the client and the server. These protocols ensure data integrity and confidentiality during file transfers.Session persistence: SSH supports session persistence, meaning that even if the network connection is interrupted, the session remains active. This feature allows users to resume their work without losing progress and avoids the need to reconnect and start over.Auditability and logging: SSH provides extensive logging capabilities, allowing administrators to monitor and track all SSH sessions. This auditability helps in identifying potential security breaches, troubleshooting issues, and maintaining accountability.Overall, using SSH on the Lenovo ThinkSystem SR670 Rack Server ensures secure, reliable, and flexible remote access, making it a preferred choice for remote server management and administration.

Simple Steps for NAS Lenovo ThinkSystem SR670 Rack Server Data Recovery

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

Has your NAS Lenovo ThinkSystem SR670 Rack Server 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?

Simple Steps for NAS Lenovo ThinkSystem SR670 Rack Server Data Recovery

Data Recovery Tool

Lenovo ThinkSystem SR670 Rack Server 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 ThinkSystem SR670 Rack Server. 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 Lenovo ThinkSystem SR670 Rack Server
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 Lenovo 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.

How can RAID (Redundant Array of Independent Disks) configurations impact data loss in NAS Lenovo ThinkSystem SR670 Rack Server devices?

RAID configurations can have a significant impact on data loss in NAS Lenovo ThinkSystem SR670 Rack Server devices. Here are a few ways RAID can affect data loss:

Data redundancy: RAID configurations, such as RAID 1 (mirroring) or RAID 5/6 (parity), provide data redundancy by storing multiple copies of data across multiple disks. In case of disk failure, the redundant data can be used to rebuild the lost information, minimizing the risk of data loss.
Fault tolerance: RAID configurations enhance fault tolerance by allowing the system to continue functioning even if one or more disks fail. This ensures that the server remains operational and data remains accessible, reducing the chances of data loss due to disk failures.
Improved performance: Certain RAID levels, such as RAID 0 (striping), can improve performance by distributing data across multiple disks. However, it's important to note that RAID 0 does not provide any data redundancy, so if one disk fails, all the data on that RAID set can be lost.
Rebuild process: When a failed disk is replaced in a RAID configuration, the system initiates a rebuild process to restore the data on the new disk. During this process, the system is vulnerable to data loss if another disk fails or if there are any errors in the rebuild process. It's crucial to monitor the rebuild process and ensure that all disks are functioning properly to minimize the risk of data loss.
RAID controller failure: The RAID controller is responsible for managing the RAID configuration and data redundancy. If the RAID controller fails, it can lead to data loss or corruption. Regular backups and monitoring of the RAID controller's health are essential to mitigate this risk.

To minimize data loss in NAS Lenovo ThinkSystem SR670 Rack Server devices, it is recommended to choose an appropriate RAID level based on the desired balance between performance, capacity, and data redundancy. Additionally, regular backups, monitoring of disk health, and RAID controller health are crucial to ensure data protection and minimize the impact of potential failures.

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

Although the NAS ThinkSystem SR670 Rack Server 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 Lenovo ThinkSystem SR670 Rack Server. 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 Lenovo

ThinkSystem SR670 Rack Server 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:

exFAT, VFAT, FAT 12 / 16 / 32;
NTFS / ReFS;
APFS / HFS+;
Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
VMFS / HikvisionFS;

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 Lenovo ThinkSystem SR670 Rack Server network-attached storage keeps LifeLine 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

Feedback

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 ThinkSystem SR670 Rack Server, feel free to leave a comment!

Reply
Solomon Holman 22.08.2023 05:49 #

Can data recovery from a NAS Lenovo ThinkSystem SR670 Rack Server device be done if the storage disks are not recognized by the device?

Reply
- Hetman Software 22.08.2023 06:59 #
  If the storage disks in a Lenovo ThinkSystem SR670 Rack Server are not recognized by the device, data recovery may still be possible, but it would require professional assistance and specialized tools. Here are a few steps you can take:
  Check connections: Ensure that all cables and connections between the server and the storage disks are properly connected and secure. Sometimes, loose connections can cause recognition issues.
  Restart the server: Try restarting the server to see if it can recognize the disks upon reboot. Sometimes, a simple restart can resolve minor issues.
  Update firmware and drivers: Make sure that the server's firmware and drivers are up to date. Outdated firmware or drivers can cause compatibility issues with the storage disks.
  Contact technical support: If the disks are still not recognized after checking connections and updating firmware, it is recommended to contact Lenovo technical support for further assistance. They may guide you through additional troubleshooting steps specific to your server model.
  Professional data recovery: If all other options fail, and if the data on the disks is critical and not backed up elsewhere, you can consult professional data recovery services. Data recovery specialists have advanced tools and techniques to recover data from malfunctioning storage devices. They can disassemble the disks and attempt to recover the data directly from the disk platters.
  Remember, attempting data recovery on your own without proper knowledge and tools can potentially cause further damage to the disks and make data recovery more difficult or even impossible. It is always recommended to seek professional help for critical data recovery situations.
  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 and how does it work as a secure protocol for remote access to a server?
SSH (Secure Shell) is a cryptographic network protocol that allows secure remote access and control of a server over an unsecured network. It provides a secure channel for communication between the client and the server, ensuring confidentiality, integrity, and authenticity of the data transmitted.
Here's how SSH works as a secure protocol for remote access:
1. Encryption: SSH uses encryption algorithms to secure the communication between the client and the server. It encrypts all the data, including passwords, commands, and responses, preventing unauthorized access to sensitive information.
2. Authentication: SSH employs various authentication methods to verify the identity of the client before granting access to the server. The most common method is public-key cryptography, where the client generates a key pair (public and private key). The client's public key is stored on the server, and during the SSH handshake, the client proves its identity by signing a challenge with its private key.
3. Key Exchange: SSH uses a key exchange algorithm to securely establish a session key between the client and the server. This session key is used to encrypt the data transmitted during the SSH session. The key exchange process ensures that even if an attacker intercepts the communication, they cannot decrypt the data without the session key.
4. Port Forwarding: SSH allows port forwarding, which enables the client to securely access services on the server's network. It creates an encrypted tunnel between the client and the server, forwarding specific ports from the server to the client's machine. This allows the client to access services as if they were running on their local machine.
5. Secure File Transfer: SSH includes secure file transfer capabilities through tools like SCP (Secure Copy) and SFTP (SSH File Transfer Protocol). These tools allow users to securely transfer files between the client and the server, ensuring data integrity and confidentiality.
Overall, SSH provides a secure and encrypted channel for remote access to a server, protecting sensitive data from eavesdropping, tampering, and unauthorized access.
How does the Lenovo ThinkSystem SR670 Rack Server utilize SSH for secure management and administration purposes?

The Lenovo ThinkSystem SR670 Rack Server utilizes SSH (Secure Shell) for secure management and administration purposes by providing a secure encrypted channel for remote access and communication.
SSH allows system administrators to securely connect to the server remotely and perform various management and administrative tasks. It provides a secure alternative to traditional remote login protocols like Telnet, as it encrypts the communication between the client and the server, protecting sensitive information such as passwords and commands from being intercepted.
The ThinkSystem SR670 Rack Server supports SSH as a standard feature, allowing administrators to establish a secure connection to the server using SSH clients such as PuTTY or OpenSSH. Once connected, administrators can remotely execute commands, configure settings, and manage the server's resources without the need for physical access.
By utilizing SSH, the ThinkSystem SR670 Rack Server ensures that the management and administration of the server are performed securely, protecting sensitive data and preventing unauthorized access to the server.
Can you explain the advantages and benefits of using SSH on the Lenovo ThinkSystem SR670 Rack Server compared to other remote access protocols?
Using SSH (Secure Shell) on the Lenovo ThinkSystem SR670 Rack Server offers several advantages and benefits over other remote access protocols:
1. Enhanced security: SSH provides strong encryption and authentication mechanisms, ensuring secure remote access to the server. It encrypts all communication between the client and the server, protecting sensitive data from eavesdropping and unauthorized access.
2. Authentication options: SSH supports various authentication methods, including password-based authentication, public key authentication, and two-factor authentication. This flexibility allows users to choose the most secure and convenient authentication method based on their requirements.
3. Portability: SSH is a widely supported protocol and is available on most operating systems, including Windows, macOS, and Linux. This portability enables users to access the Lenovo ThinkSystem SR670 Rack Server from different client devices and operating systems without any compatibility issues.
4. Remote command execution: SSH allows users to execute commands on the remote server, providing a convenient way to manage and administer the server remotely. This capability is particularly useful for system administrators who need to perform tasks on the server without physical access.
5. File transfer capabilities: SSH includes secure file transfer protocols, such as SCP (Secure Copy) and SFTP (SSH File Transfer Protocol), which enable users to securely transfer files between the client and the server. These protocols ensure data integrity and confidentiality during file transfers.
6. Session persistence: SSH supports session persistence, meaning that even if the network connection is interrupted, the session remains active. This feature allows users to resume their work without losing progress and avoids the need to reconnect and start over.
7. Auditability and logging: SSH provides extensive logging capabilities, allowing administrators to monitor and track all SSH sessions. This auditability helps in identifying potential security breaches, troubleshooting issues, and maintaining accountability.
Overall, using SSH on the Lenovo ThinkSystem SR670 Rack Server ensures secure, reliable, and flexible remote access, making it a preferred choice for remote server management and administration.