Features of NAS QNAP TVS-871 Data Recovery in Home Environments

Perform ⭐ NAS data recovery at home using software that offers recovery from deleted or lost partitions.

Features of NAS QNAP TVS-871 Data Recovery in Home Environments

QNAP TVS-871 NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from TVS-871.

Features of NAS QNAP TVS-871 Data Recovery in Home Environments

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 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.

Can elevation of privileges or compromised user accounts lead to data loss or unauthorized access on NAS QNAP TVS-871 devices?

Yes, elevation of privileges or compromised user accounts can potentially lead to data loss or unauthorized access on NAS QNAP TVS-871 devices. If an attacker gains elevated privileges or compromises a user account on the device, they may be able to access, modify, or delete sensitive data stored on the NAS.

Elevation of privileges refers to gaining higher levels of access within a system than originally intended. If an attacker manages to elevate their privileges on the QNAP TVS-871, they may gain administrative access and control over the device, allowing them to manipulate or delete data.

Similarly, if a user account on the NAS is compromised, the attacker may gain unauthorized access to the device and its stored data. They could potentially view, modify, or delete files, depending on the permissions associated with the compromised account.

To mitigate these risks, it is important to ensure strong security practices such as regularly updating the NAS firmware, using strong passwords, enabling multi-factor authentication, and implementing proper access controls and permissions. Additionally, monitoring the device for any suspicious activities or unauthorized access attempts can help detect and prevent potential data loss or unauthorized access.

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

Although NAS TVS-871 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 TVS-871. 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

TVS-871 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 TVS-871 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

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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 TVS-871, feel free to leave a comment!
  • Ray Bovey
    Ray Bovey 17.09.2023 04:39 #
    Are there any specific techniques used in data recovery from NAS QNAP TVS-871 devices with RAID configurations?
    • Hetman Software
      Hetman Software 17.09.2023 05:00 #

      Yes, there are specific techniques used in data recovery from NAS QNAP TVS-871 devices with RAID configurations. Here are some common techniques:

      1. Rebuilding RAID: If a RAID array fails, the first step is to rebuild the RAID configuration. This involves identifying the failed drives, replacing them if necessary, and rebuilding the array to restore data accessibility.
      2. Data Reconstruction: In cases where the RAID array is intact but data is corrupted or missing, data reconstruction techniques are used. This involves analyzing the RAID metadata and reconstructing the data from the remaining drives.
      3. Disk Imaging: In situations where individual drives have failed, disk imaging techniques are used to create a sector-by-sector copy of the faulty drives. This allows for data recovery attempts without risking further damage to the original drive.
      4. Data Carving: Data carving is a technique used to recover specific file types from a NAS device. It involves scanning the raw data on the drives and identifying file signatures to extract individual files.
      5. Logical Recovery: Logical recovery techniques involve repairing file system structures and recovering data from logically damaged drives. This can include repairing directory structures, file allocation tables, and other file system components.

      It's important to note that data recovery from NAS devices with RAID configurations can be complex and should be performed by experienced professionals.

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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 are the different file access security features available in the NAS QNAP TVS-871?

    The QNAP TVS-871 NAS offers several file access security features, including:

    1. Access Control List (ACL): This feature allows you to set permissions and restrictions for individual users or groups, controlling their access to files and folders.
    2. Windows ACL Support: The NAS supports Windows ACL, enabling seamless integration with Windows Active Directory for centralized access control.
    3. Shared Folder Permissions: You can assign different access permissions (Read, Write, Execute) to users or groups for shared folders on the NAS.
    4. User Quota Management: The TVS-871 allows you to set storage quotas for individual users, limiting their usage and preventing excessive storage consumption.
    5. File Encryption: The NAS supports AES 256-bit encryption for shared folders, ensuring data confidentiality and protection against unauthorized access.
    6. IP Access Control: You can restrict access to the NAS by specifying IP addresses or ranges, allowing only authorized devices to connect.
    7. Antivirus Protection: The TVS-871 integrates with various antivirus software, enabling real-time scanning and protection against malware and viruses.
    8. Secure Remote Access: The NAS offers secure remote access methods, such as VPN, SSL/TLS encryption, and two-factor authentication, ensuring secure file access from outside the local network.
    9. Snapshot Protection: The TVS-871 supports snapshot technology, allowing you to create point-in-time copies of shared folders, protecting against accidental deletion or modification.
    10. File Versioning: You can enable file versioning on the NAS, which keeps multiple versions of files, allowing you to restore previous versions if needed.

    These features provide robust file access security and help safeguard data stored on the QNAP TVS-871 NAS.

  • How can the NAS QNAP TVS-871 ensure secure file access for multiple users or groups?

    The NAS QNAP TVS-871 offers several features to ensure secure file access for multiple users or groups. Here are some ways it can achieve this:

    1. User and group management: The QNAP NAS allows you to create multiple user accounts and groups, each with their own set of permissions. This enables you to control who can access specific files and folders.
    2. Access control lists (ACL): ACLs provide more granular control over file access by allowing you to define permissions for individual users or groups at a file or folder level. This ensures that only authorized users or groups can access certain files or folders.
    3. Folder encryption: The TVS-871 supports folder encryption, which allows you to encrypt specific folders with a password. This ensures that even if unauthorized users gain access to the NAS, they won't be able to view the encrypted files without the password.
    4. IP access control: You can restrict access to the NAS by specifying IP addresses or ranges that are allowed to connect to it. This prevents unauthorized access from external sources.
    5. Two-factor authentication (2FA): The QNAP NAS supports 2FA, adding an extra layer of security to user logins. Users will need to provide a second form of authentication, such as a one-time password generated by a mobile app, in addition to their regular login credentials.
    6. Antivirus and malware scanning: The TVS-871 includes built-in antivirus and malware scanning capabilities. This helps to detect and prevent any malicious files from being uploaded or accessed by users, thus ensuring the security of the files on the NAS.
    7. HTTPS and SSL/TLS encryption: The NAS supports HTTPS connections, which encrypts the data transmitted between the NAS and the connected devices. SSL/TLS encryption ensures that data transfers are secure, preventing unauthorized interception or tampering.

    By utilizing these features and settings, the QNAP TVS-871 can ensure secure file access for multiple users or groups, protecting sensitive data and preventing unauthorized access.

  • What measures does the NAS QNAP TVS-871 take to protect against unauthorized access and data breaches?

    The NAS QNAP TVS-871 incorporates several measures to protect against unauthorized access and data breaches. Some of these measures include:

    1. User Access Control: The device allows administrators to create multiple user accounts with different access privileges. This ensures that only authorized users can access specific files and folders.
    2. Secure Login: The NAS supports secure login protocols such as HTTPS and SSH, which encrypt the login credentials and data transmission to prevent interception by unauthorized parties.
    3. Two-Factor Authentication (2FA): QNAP supports 2FA, which adds an extra layer of security by requiring users to provide a second form of authentication, such as a verification code from a mobile app, in addition to their password.
    4. IP Access Control: Administrators can restrict access to the NAS by specifying IP addresses or IP ranges that are allowed or denied access. This helps prevent unauthorized access from external networks.
    5. Antivirus and Malware Protection: The NAS includes built-in antivirus and malware scanning capabilities to detect and remove any malicious files that could compromise the system or data.
    6. Network Security: QNAP provides features like firewall settings, network access protection, and SSL/TLS encryption to secure network connections and prevent unauthorized access.
    7. Data Encryption: The NAS supports AES 256-bit encryption for shared folders and volumes, ensuring that data stored on the device is encrypted and protected from unauthorized access, even if the physical drives are stolen.
    8. Data Backup and Snapshot: QNAP offers various backup solutions, including scheduled backups to external devices or cloud storage, and snapshot technology to create point-in-time copies of data. These features help protect against data loss in case of accidental deletion or ransomware attacks.
    9. Audit Logs and Alerts: The device logs user activities and system events, allowing administrators to monitor and review any suspicious activities. It can also send email notifications or push notifications to alert administrators about potential security breaches.

    It is important to note that while the NAS QNAP TVS-871 provides several security measures, it is also crucial for users to keep the device firmware up to date, use strong passwords, and follow best practices for network security to further enhance protection against unauthorized access and data breaches.

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