Extracting Data from a RAID Disk When NAS Asustor DRIVESTOR 4 Pro Does Not Begin: Step-by-Step Guide

Has your NAS Asustor DRIVESTOR 4 Pro 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?

Extracting Data from a RAID Disk When NAS Asustor DRIVESTOR 4 Pro Does Not Begin: Step-by-Step Guide
Data Recovery Tool

Asustor DRIVESTOR 4 Pro 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 DRIVESTOR 4 Pro. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Extracting Data from a RAID Disk When NAS Asustor DRIVESTOR 4 Pro Does Not Begin: Step-by-Step Guide

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 Asustor 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 Asustor DRIVESTOR 4 Pro devices?

Insufficient power supply or voltage fluctuations can potentially cause data loss on any electronic device, including NAS devices like the Asustor DRIVESTOR 4 Pro. Sudden power outages or voltage spikes can lead to the interruption of data transfer processes, corruption of data, or even physical damage to the device's components.

To mitigate the risk of data loss, it is recommended to use a high-quality uninterruptible power supply (UPS) that can provide a stable power source and protect against sudden power fluctuations or outages. Additionally, regularly backing up your data to an external storage device or cloud storage can provide an extra layer of protection against potential data loss.

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

Although the NAS DRIVESTOR 4 Pro 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:

  1. 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.

  2. 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.

  3. Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.

  4. 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.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

Hetman Raid Recovery

This program restores data from damaged RAID arrays and is fully compatible with Asustor DRIVESTOR 4 Pro. 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.

Go to view
How to recover data from a Asustor

How to recover data from a Asustor

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

  • RAID 0;
  • RAID 1;
  • RAID 5;
  • RAID 6;
  • RAID 10;
  • JBOD;

NAS supports:

  • 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:

  1. Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.

  2. In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.

  3. 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.

    Hetman RAID Recovery: Image Creation Wizard

  4. 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.

    Hetman RAID Recovery: Choose a disk or save the image via FTP

Where Are the User’s Files Actually Stored?

The Asustor DRIVESTOR 4 Pro 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

Feedback

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 DRIVESTOR 4 Pro, feel free to leave a comment!
    Reply
  • Travis Massengill
    Travis Massengill 11.09.2023 20:58 #
    Can data recovery from a NAS Asustor DRIVESTOR 4 Pro device be done if the device is not responding or freezing frequently?
    Reply
    • Hetman Software
      Hetman Software 11.09.2023 22:00 #

      Yes, data recovery from a NAS Asustor DRIVESTOR 4 Pro device can be possible even if the device is not responding or freezing frequently. However, it is important to note that the success of data recovery depends on the severity of the issue and the condition of the device's hardware.

      Here are a few steps you can try to recover data from a non-responsive or freezing NAS device:

      1. Restart the device: Try restarting the NAS device to see if it resolves the issue temporarily. Sometimes, a simple reboot can fix minor software or connectivity problems.
      2. Check network connectivity: Ensure that the NAS device is properly connected to the network and there are no issues with the network cables or router. Sometimes, network connectivity problems can cause the device to freeze or become unresponsive.
      3. Update firmware: Check if there are any firmware updates available for the Asustor DRIVESTOR 4 Pro device. Updating the firmware can fix bugs and improve the device's performance.
      4. Troubleshoot hardware issues: If the device continues to freeze or become unresponsive, it might indicate a hardware problem. In such cases, it is recommended to contact the manufacturer's support or a professional data recovery service to diagnose and repair the hardware issue.
      5. Professional data recovery service: If the above steps do not work, or if the device's hardware is failing, it is advisable to seek professional data recovery services. Data recovery experts have specialized tools and techniques to recover data from faulty NAS devices.

      Remember, it is crucial to avoid attempting any DIY data recovery methods that could potentially worsen the situation or cause permanent data loss.

      Reply
Post comment
User
Leave a reply
Your email address will not be published. Required fields are marked *

  • Updated:
  • Evaluations:
  • 5
  • /
  • :
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.

Share

Questions and answers

  • What are the necessary steps to set up a NAS Asustor DRIVESTOR 4 Pro at home?

    To set up an Asustor DRIVESTOR 4 Pro NAS at home, follow these steps:

    1. Unpack the NAS: Remove the NAS from its packaging and place it in a suitable location.
    2. Connect the NAS to Power: Plug in the power adapter to the NAS and connect it to a power outlet.
    3. Connect the NAS to the Network: Use an Ethernet cable to connect the NAS to your home router or switch. Ensure a stable and reliable network connection.
    4. Power on the NAS: Press the power button on the NAS to turn it on. Wait for it to complete the booting process.
    5. Access the NAS Web Interface: Open a web browser on your computer and enter the IP address of the NAS. The default IP address is usually mentioned in the user manual or can be found using a network scanner tool.
    6. Configure the NAS: Follow the on-screen instructions to set up the NAS. Create a new administrator account, set the desired password, and configure network settings such as IP address, DNS, and gateway.
    7. Create Storage Pools: In the NAS web interface, navigate to the Storage Manager section and create storage pools according to your requirements. You can choose RAID levels, disk configurations, and other settings.
    8. Create Shared Folders: After creating storage pools, create shared folders to organize your data. Assign appropriate access permissions to users or groups.
    9. Set Up Additional Features: Explore the NAS web interface to configure additional features such as user accounts, backup solutions, cloud services, multimedia servers, and other applications.
    10. Access the NAS: Once the initial setup is complete, you can access the NAS from your computer or other devices using the NAS IP address or hostname. You can map network drives, access files, and perform various tasks.

    Remember to consult the user manual or Asustor's official support resources for detailed instructions specific to your model.

  • What are the key features and benefits of using a NAS Asustor DRIVESTOR 4 Pro for home storage needs?

    The Asustor DRIVESTOR 4 Pro is a Network Attached Storage (NAS) device designed for home storage needs. It offers several key features and benefits:

    1. Storage capacity: The DRIVESTOR 4 Pro supports up to four 3.5-inch SATA hard drives, providing ample storage space for home users. It can handle large media libraries, backups, and file sharing.
    2. High-performance hardware: It is equipped with a powerful quad-core Intel processor and 4GB of DDR4 RAM, ensuring smooth and efficient performance for tasks like file transfers, streaming media, and running applications.
    3. Easy setup and management: The NAS comes with Asustor's user-friendly ADM operating system, enabling easy setup and management of the device. It provides a web-based interface that allows users to configure settings, create user accounts, and manage storage efficiently.
    4. Data protection and security: The DRIVESTOR 4 Pro supports RAID configurations (RAID 0, 1, 5, 6, 10) for data protection and redundancy. It also offers built-in data encryption, ensuring data security and privacy.
    5. Multimedia and streaming capabilities: With its powerful hardware, the NAS can handle multimedia tasks effortlessly. It supports various media server apps like Plex and Emby, allowing users to stream media content to different devices within their home network.
    6. Remote access and mobile apps: Asustor provides mobile apps for iOS and Android devices, enabling remote access to files, media, and applications stored on the NAS. Users can access their data securely from anywhere, enhancing convenience and flexibility.
    7. Expandability and connectivity: The DRIVESTOR 4 Pro offers multiple USB ports and an HDMI 2.0a port, allowing users to connect additional storage devices, peripherals, and even use the NAS as a media player by connecting it to a TV or monitor.
    8. Energy-efficient design: Asustor NAS devices are designed with energy efficiency in mind. The DRIVESTOR 4 Pro consumes relatively low power, reducing electricity costs and environmental impact.

    Overall, the Asustor DRIVESTOR 4 Pro is a reliable and feature-rich NAS solution for home storage needs, offering high performance, data protection, multimedia capabilities, and easy management.

  • Are there any specific requirements or considerations to keep in mind while setting up a NAS Asustor DRIVESTOR 4 Pro at home?

    Yes, there are some specific requirements and considerations to keep in mind while setting up a NAS Asustor DRIVESTOR 4 Pro at home. Here are a few:

    1. Network Connectivity: Ensure that you have a stable and high-speed network connection, preferably Gigabit Ethernet, to connect the NAS to your router or switch.
    2. Power Supply: Make sure you have a stable power supply to avoid any unexpected shutdowns or damage to the NAS. Consider using a UPS (Uninterruptible Power Supply) to protect against power outages and voltage fluctuations.
    3. Storage Drives: Choose compatible and reliable hard drives for your NAS. Refer to the manufacturer's website or user manual for a list of supported drives. It is recommended to use NAS-specific hard drives designed for continuous operation.
    4. RAID Configuration: Decide on the RAID configuration you want to use for data redundancy and performance. The DRIVESTOR 4 Pro supports various RAID levels, such as RAID 0, 1, 5, 6, 10, and JBOD. Plan your storage needs and choose the appropriate RAID level.
    5. NAS Setup: Follow the manufacturer's instructions or user manual to set up the NAS. This typically involves connecting the NAS to your network, configuring network settings, initializing the storage drives, and setting up user accounts and permissions.
    6. Security: Enable security features such as firewall, antivirus, and encryption to protect your data. Create strong passwords for user accounts and regularly update the NAS firmware to ensure it is up-to-date with the latest security patches.
    7. Backup: Implement a backup strategy to protect your data from accidental deletion, hardware failures, or other disasters. Consider using external backup drives, cloud storage, or remote backups to ensure data redundancy.
    8. Cooling and Ventilation: Ensure proper cooling and ventilation for the NAS to prevent overheating. Place the NAS in a well-ventilated area and avoid blocking the cooling fans.
    9. Access and Remote Management: Set up remote access and management options to access your NAS from outside your home network. This may involve configuring port forwarding on your router or using a VPN (Virtual Private Network) for secure remote access.

    Always refer to the manufacturer's documentation and guidelines for specific instructions and any additional requirements for setting up your NAS Asustor DRIVESTOR 4 Pro.
This website uses cookies to improve your experience. Description