Preventing Data Loss on NAS D-Link DNS-722-4 and Recovering Deleted Files: Complete Guide

Backup ⭐ NAS data regularly to avoid data loss and recover deleted files from backups.

Preventing Data Loss on NAS D-Link DNS-722-4 and Recovering Deleted Files: Complete Guide

D-Link DNS-722-4 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from DNS-722-4.

Preventing Data Loss on NAS D-Link DNS-722-4 and Recovering Deleted Files: Complete Guide

RAID Recovery™ 2.6
Recover data from damaged RAID arrays inaccessible from a computer.
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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 D-Link 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 hardware upgrades or modifications lead to data loss if not properly executed on NAS D-Link DNS-722-4 devices?

Yes, hardware upgrades or modifications can potentially lead to data loss if not properly executed on NAS D-Link DNS-722-4 devices. When performing hardware upgrades or modifications, there is always a risk of accidentally damaging the storage drives or other components, which could result in data loss. It is crucial to follow the manufacturer's instructions carefully and ensure that backups of important data are made before attempting any hardware changes.

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

Although NAS DNS-722-4 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 D-Link DNS-722-4. 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.

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How to recover data from a D-Link

How to recover data from a D-Link

DNS-722-4 has 2 HDD slots, and it supports the following array types:

  • RAID 0;
  • RAID 1;
  • JBOD;

NAS supports:

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

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 D-Link DNS-722-4 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

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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 DNS-722-4, feel free to leave a comment!
  • Alec Bollin
    Alec Bollin 12.09.2023 10:54 #
    Will data recovery from a NAS D-Link DNS-722-4 device affect the existing data?
    • Hetman Software
      Hetman Software 12.09.2023 11:59 #

      No, performing data recovery on a NAS (Network Attached Storage) device like the D-Link DNS-722-4 should not affect the existing data. Data recovery processes typically involve scanning the storage media for lost or deleted files and then copying them to a separate location. As long as the recovery process is done correctly, it should not modify or overwrite any existing data on the device. However, it is always recommended to consult with a professional data recovery service or follow the manufacturer's instructions to ensure the safety of your data during 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 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.

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Questions and answers

  • What is SSH (Secure Shell) and how does it work to provide secure remote access to a network device like the NAS D-Link DNS-722-4?

    SSH (Secure Shell) is a cryptographic network protocol that provides secure remote access to network devices. It allows users to securely log in to a remote device over an unsecured network, such as the internet, and perform various tasks.

    When it comes to the NAS D-Link DNS-722-4, SSH enables users to access and manage the device remotely while ensuring the confidentiality and integrity of the data being transmitted. Here's how it works:

    1. Authentication: SSH uses public-key cryptography to authenticate the remote device and the user. The user generates a pair of cryptographic keys: a public key and a private key. The public key is stored on the NAS device, while the private key is kept securely on the user's computer.
    2. Secure Connection Establishment: Once the user initiates an SSH connection to the NAS device, the device sends its public key to the user's SSH client. The client then verifies the authenticity of the device using the stored public key. If the verification is successful, the client generates a random session key for encryption.
    3. Encryption: SSH uses encryption algorithms to secure the communication between the client and the NAS device. All data transmitted over the SSH connection is encrypted, making it difficult for attackers to intercept and understand the information.
    4. Secure Remote Access: Once the SSH connection is established and encrypted, the user can remotely access the NAS device's command-line interface (CLI) or execute specific commands. The user can perform tasks such as file transfers, configuration changes, and system administration.

    Overall, SSH ensures secure remote access to the NAS D-Link DNS-722-4 by employing encryption, authentication, and secure connection establishment protocols. This helps protect sensitive information and prevents unauthorized access to the network device.

  • Can you explain the key features and benefits of using SSH protocol for accessing and managing the NAS D-Link DNS-722-4?

    The SSH (Secure Shell) protocol is a secure method for accessing and managing network devices like the D-Link DNS-722-4 NAS (Network Attached Storage). Here are the key features and benefits of using SSH for this purpose:

    1. Secure Remote Access: SSH provides a secure encrypted connection between your computer and the NAS device, ensuring that your data and credentials are protected from unauthorized access.
    2. Authentication and Encryption: SSH uses public-key cryptography to authenticate the NAS device and the user, preventing unauthorized access. It also encrypts the data transmission, making it difficult for anyone to intercept and interpret the data.
    3. Command-Line Interface (CLI): SSH provides a command-line interface to access and manage the NAS device. This allows advanced users to perform various administrative tasks efficiently and quickly.
    4. Remote File Transfer: SSH supports secure file transfer between your computer and the NAS device. You can securely transfer files to and from the NAS, ensuring the privacy and integrity of your data.
    5. Port Forwarding: SSH allows you to set up port forwarding, which enables you to securely access services running on the NAS device from your computer or other devices on the network. This is useful for accessing web interfaces or other services hosted on the NAS.
    6. Secure Configuration and Management: With SSH, you can securely configure and manage various settings of the NAS device, such as network settings, user accounts, shared folders, and access permissions. This ensures that your NAS is properly configured and protected.
    7. Scripting and Automation: SSH can be used in scripting and automation workflows to perform repetitive tasks on the NAS device. This saves time and effort by automating tasks like backups, synchronization, or data transfers.

    Overall, using SSH protocol for accessing and managing the D-Link DNS-722-4 NAS provides a secure and efficient way to control and configure the device, ensuring the privacy and integrity of your data.

  • How does the NAS D-Link DNS-722-4 utilize SSH protocol to enhance security and protect sensitive data during remote management and file transfers?

    The NAS D-Link DNS-722-4 utilizes the SSH (Secure Shell) protocol to enhance security and protect sensitive data during remote management and file transfers in the following ways:

    1. Encrypted Communication: SSH provides secure, encrypted communication between the NAS device and the remote client. It ensures that data transmitted between the two endpoints cannot be intercepted or tampered with by unauthorized parties.
    2. Authentication: SSH uses public-key cryptography or password-based authentication to verify the identity of the remote client. This prevents unauthorized access to the NAS device and ensures that only authenticated users can remotely manage or transfer files.
    3. Secure File Transfers: SSH enables secure file transfers through protocols like SFTP (SSH File Transfer Protocol) or SCP (Secure Copy). These protocols encrypt the data being transferred, preventing eavesdropping or data interception during file transfers.
    4. Port Forwarding: SSH allows for secure port forwarding, which enables remote access to services running on the NAS device without exposing them directly to the internet. This adds an extra layer of security by keeping the NAS device hidden behind the SSH connection.
    5. Secure Remote Management: By using SSH, the NAS device can be remotely managed through a secure command-line interface (CLI). This allows administrators to securely execute commands, configure settings, and perform maintenance tasks on the device without compromising security.

    Overall, the NAS D-Link DNS-722-4 utilizes the SSH protocol to establish a secure and encrypted connection, authenticate users, protect data during file transfers, and enable secure remote management, thereby enhancing security and safeguarding sensitive data.

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