How to recover data from QNAP VS-8140 Pro+ 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 QNAP VS-8140 Pro+

QNAP VS-8140 Pro+ NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from VS-8140 Pro+.

How to recover data from NAS QNAP VS-8140 Pro+

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 QNAP 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 regular system monitoring and alerting help in early detection and prevention of data loss events on NAS QNAP VS-8140 Pro+ devices?

Regular system monitoring and alerting can help in early detection and prevention of data loss events on NAS QNAP VS-8140 Pro+ devices by providing the following benefits:

  1. Proactive monitoring: Regular system monitoring allows administrators to monitor the health and performance of the NAS device. By monitoring key metrics such as CPU usage, memory utilization, disk health, and network traffic, administrators can identify any abnormal behavior or potential issues that may lead to data loss.
  2. Resource utilization monitoring: Monitoring resource utilization helps administrators identify any spikes or unusual patterns in CPU or memory usage. This can indicate potential issues such as malware infection or unauthorized access attempts, which can lead to data loss.
  3. Disk monitoring: Monitoring the health of the NAS disks is crucial in preventing data loss. Regular monitoring can help identify early signs of disk failure or degradation, such as bad sectors or increasing read/write errors. By detecting these issues early on, administrators can take necessary actions such as replacing the faulty disk or initiating data backup and restoration processes.
  4. RAID array monitoring: NAS devices often use RAID configurations for data redundancy and protection against disk failures. Monitoring the RAID array ensures its integrity and identifies any issues that may impact data availability. For example, monitoring can detect a failed disk in a RAID array and trigger automatic rebuild processes to prevent data loss.
  5. Network monitoring: Monitoring network traffic and access logs can help identify any suspicious activities or unauthorized access attempts. This can help administrators detect potential security breaches or data breaches, allowing them to take immediate actions to prevent data loss.
  6. Alerting mechanisms: Setting up alerting mechanisms, such as email notifications or SMS alerts, can notify administrators in real-time when any abnormal behavior or critical events occur. This allows them to respond promptly and take necessary actions to prevent data loss.

By implementing regular system monitoring and alerting, administrators can proactively detect and prevent data loss events on NAS QNAP VS-8140 Pro+ devices, ensuring the safety and availability of critical data.

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

Although NAS VS-8140 Pro+ 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 QNAP VS-8140 Pro+. 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 QNAP

How to recover data from a QNAP

VS-8140 Pro+ has 8 HDD slots, and it supports the following array types:

  • RAID 50;
  • RAID 60;
  • RAID 6;
  • RAID 5;
  • RAID 10;
  • RAID 0;
  • RAID 1;
  • JBOD;

NAS supports:

  • ZFS;
  • EXT4;
  • EXT3;
  • exFAT;
  • FAT32 (External Disk Only);
  • NTFS (External Disk Only);
  • HFS+ (External Disk Read Only);

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 QNAP VS-8140 Pro+ network-attached storage keeps QTS (QuTS hero) 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 VS-8140 Pro+, feel free to leave a comment!
  • Elisha Maggs
    Elisha Maggs 16.09.2023 14:49 #
    Can data recovery from a NAS QNAP VS-8140 Pro+ device be done if the device is showing signs of excessive noise or vibration?
    • Hetman Software
      Hetman Software 16.09.2023 15:00 #

      If a NAS device, such as the QNAP VS-8140 Pro+, is showing signs of excessive noise or vibration, it may indicate a hardware issue. In such cases, it is recommended to address the hardware problem first before attempting any data recovery.

      Excessive noise or vibration can be caused by various factors, such as a failing fan, loose components, or a failing hard drive. Continuing to use the device in this condition may lead to further damage and potentially permanent data loss.

      To ensure the best chance of data recovery, it is advisable to contact a professional data recovery service or the manufacturer's support team for assistance. They will have the necessary expertise and tools to diagnose and resolve the hardware issue, and if required, attempt data recovery from the device.

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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 the role of RAID in the QNAP VS-8140 Pro+ NAS system and how does it enhance data storage and protection capabilities?

    RAID (Redundant Array of Independent Disks) plays a crucial role in the QNAP VS-8140 Pro+ NAS system by enhancing data storage and protection capabilities. The VS-8140 Pro+ supports various RAID configurations, including RAID 0, 1, 5, 6, 10, 50, 60, and JBOD (Just a Bunch of Disks).

    1. Data Storage Capacity: RAID allows multiple hard drives to work together as a single logical unit, combining their storage capacity. For example, RAID 0 striping combines the capacity of multiple drives, resulting in increased storage space.
    2. Data Redundancy: RAID provides data redundancy, ensuring the system can recover from disk failures without losing data. In RAID 1, data is mirrored across two drives, so if one fails, the other maintains a complete copy. RAID 5, 6, 50, and 60 use distributed parity or dual parity to store redundant information across multiple drives, allowing recovery from one or more disk failures.
    3. Performance Improvement: Certain RAID levels, such as RAID 0 and 10, enhance performance by striping data across multiple drives. This allows for faster data access and improved read/write speeds, which is beneficial for tasks like video editing or large file transfers.
    4. Hot Spare and Hot Swapping: The QNAP VS-8140 Pro+ NAS system supports hot swapping, meaning you can replace a failed drive without shutting down the system. Additionally, RAID configurations can include a hot spare, which is an extra drive that remains idle until another drive fails. The hot spare automatically replaces the failed drive, reducing downtime and enhancing data protection.
    5. Data Integrity: RAID systems often implement error-checking mechanisms, such as checksums, to ensure data integrity. This helps detect and correct errors that may occur during data transmission or storage.

    Overall, RAID in the QNAP VS-8140 Pro+ NAS system enhances data storage and protection capabilities by increasing storage capacity, providing data redundancy, improving performance, enabling hot swapping and hot spare support, and ensuring data integrity.

  • Can you explain the different RAID levels supported by the QNAP VS-8140 Pro+ NAS and their respective advantages and disadvantages?

    The QNAP VS-8140 Pro+ NAS supports several RAID levels, each with its own advantages and disadvantages. Here are the most commonly supported RAID levels and their characteristics:

    1. RAID 0 (Striping):
    • Advantages: Offers maximum capacity utilization by striping data across multiple drives. Provides high performance as data can be read/write simultaneously from/to multiple drives.
    • Disadvantages: No data redundancy. If one drive fails, all data is lost.
    1. RAID 1 (Mirroring):
    • Advantages: Provides full data redundancy by creating an exact copy (mirror) of data on two drives. If one drive fails, the other continues to function.
    • Disadvantages: Reduced capacity utilization (50% of total capacity) as data is duplicated on both drives. No performance improvement as data is written to both drives simultaneously.
    1. RAID 5 (Striping with Parity):
    • Advantages: Balances capacity utilization and data redundancy. Data is striped across multiple drives, with parity information distributed across drives. If one drive fails, data can be reconstructed using parity information.
    • Disadvantages: Reduced write performance due to the need to calculate and write parity information. Slower rebuild times during drive failure recovery.
    1. RAID 6 (Striping with Dual Parity):
    • Advantages: Similar to RAID 5 but with an additional layer of parity protection. Can tolerate the failure of two drives simultaneously.
    • Disadvantages: Further reduced write performance compared to RAID 5 due to the need to calculate and write dual parity information. Longer rebuild times during drive failure recovery.
    1. RAID 10 (Mirroring with Striping):
    • Advantages: Combines the benefits of RAID 1 and RAID 0. Provides both data redundancy and improved performance. Data is mirrored across two sets of striped drives.
    • Disadvantages: Reduced capacity utilization (50% of total capacity) as data is mirrored on both sets of drives.

    It is important to note that the choice of RAID level depends on factors such as desired capacity, performance, and data redundancy. RAID 5 or RAID 6 are commonly recommended for NAS systems like the QNAP VS-8140 Pro+ as they offer a good balance between capacity utilization and data protection. However, the specific requirements and priorities of the user should be considered when selecting the appropriate RAID level.

  • How does the RAID configuration impact the performance, capacity, and fault tolerance of the QNAP VS-8140 Pro+ NAS, and what factors should be considered when choosing the appropriate RAID level for specific use cases?

    The RAID configuration of the QNAP VS-8140 Pro+ NAS can have a significant impact on performance, capacity, and fault tolerance. The NAS supports various RAID levels, including RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, and RAID 50.

    1. Performance: RAID 0 offers the best performance as it stripes data across multiple drives, allowing for parallel read and write operations. However, it does not provide any fault tolerance. RAID 10 also offers good performance by combining striping and mirroring, but it requires a larger number of drives.
    2. Capacity: RAID levels like RAID 0 and RAID 10 provide maximum capacity utilization as they do not reserve any space for redundancy. RAID 5, RAID 6, and RAID 50, on the other hand, reserve a portion of the total capacity for parity data, reducing the overall usable capacity.
    3. Fault tolerance: RAID levels that include redundancy, such as RAID 1, RAID 5, RAID 6, and RAID 10, provide fault tolerance. If a drive fails, the system can rebuild the data using the redundancy information. RAID 5 can tolerate the failure of a single drive, while RAID 6 can handle the failure of two drives. RAID 10 can withstand the failure of multiple drives as long as they are not mirrored pairs.

    When choosing the appropriate RAID level for specific use cases, several factors should be considered:

    1. Performance requirements: Determine the required read and write speeds for your specific workload. If performance is critical, RAID 0 or RAID 10 might be suitable choices.
    2. Data protection: Evaluate the importance of data redundancy and fault tolerance. If data integrity is crucial, RAID 1, RAID 5, RAID 6, or RAID 10 should be considered.
    3. Usable capacity: Consider the amount of usable storage space required for your data. RAID 0 and RAID 10 offer maximum capacity utilization, while RAID 5, RAID 6, and RAID 50 reserve some space for redundancy.
    4. Cost: RAID levels with higher fault tolerance often require more drives, resulting in higher costs. Evaluate the budget constraints when choosing the appropriate RAID level.
    5. Future scalability: Consider the potential for future expansion. RAID levels like RAID 5 and RAID 6 allow for easy capacity expansion by adding more drives to the array.

    By carefully considering these factors, you can select the appropriate RAID level that balances performance, capacity, and fault tolerance for your specific use case.

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