How to recover data from QNAP TES-3085U(QES) 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 TES-3085U(QES)

QNAP TES-3085U(QES) NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from TES-3085U(QES).

How to recover data from NAS QNAP TES-3085U(QES)

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 conducting regular backups on external storage devices mitigate data loss risks for NAS QNAP TES-3085U(QES) devices?

Conducting regular backups on external storage devices can mitigate data loss risks for NAS QNAP TES-3085U(QES) devices in the following ways:

  1. Redundancy: By backing up data on external storage devices, you create a redundant copy of your important files and data. In case of any data loss or corruption on the primary NAS device, you can restore the data from the external backup, ensuring its availability and integrity.
  2. Disaster Recovery: External backups provide a means to recover data in case of a catastrophic event like hardware failure, natural disasters, or ransomware attacks. By regularly backing up data, you can restore the entire system or specific files and folders to a previous state, minimizing downtime and ensuring business continuity.
  3. Protection against Human Errors: Accidental deletion, overwriting, or modification of important files can happen due to human errors. By having backups on external storage devices, you can retrieve the previous versions of files or restore them entirely, mitigating the risk of permanent data loss.
  4. Off-site Storage: Storing backups on external devices allows you to keep them off-site, away from the primary NAS device. This protects your data from physical damage, theft, or other local incidents that may affect the primary device. Off-site backups provide an extra layer of security and ensure that your data is safe even if the primary NAS device is compromised.
  5. Versioning and Point-in-Time Recovery: Some backup solutions offer versioning and point-in-time recovery features. This allows you to restore specific versions of files or recover data from a specific point in time, which can be crucial in case of data corruption or accidental changes.
  6. Flexibility and Portability: External storage devices provide flexibility in terms of storage capacity and portability. You can choose the appropriate size of the external device based on your backup needs and easily transfer the backups to different locations if required.

It is important to establish a regular backup schedule, ensure the integrity of the backups, and periodically test the restoration process to guarantee the effectiveness of your backup strategy.

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

Although NAS TES-3085U(QES) 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 TES-3085U(QES). 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

TES-3085U(QES) has 30 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 TES-3085U(QES) 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 TES-3085U(QES), feel free to leave a comment!
  • Ethan MacAndrew
    Ethan MacAndrew 14.09.2023 22:44 #
    Can data recovery from NAS QNAP TES-3085U(QES) be done by individuals or is professional assistance necessary?
    • Hetman Software
      Hetman Software 14.09.2023 23:00 #

      Data recovery from a NAS (Network Attached Storage) device like the QNAP TES-3085U(QES) can be a complex process and often requires professional assistance. Here are a few reasons why professional help may be necessary:

      1. Technical expertise: Data recovery from a NAS involves understanding the complex storage architecture, file systems, and RAID configurations. Professional data recovery experts have the necessary technical knowledge and experience to handle such tasks effectively.
      2. Specialized tools and equipment: Professional data recovery companies have access to specialized tools and equipment required to recover data from faulty NAS devices. These tools help in diagnosing and repairing hardware issues, as well as recovering data from damaged drives or RAID arrays.
      3. Preventing further damage: Attempting data recovery without proper knowledge and tools can potentially cause further damage to the NAS device or the data itself. Professionals are trained to handle delicate hardware components and can minimize the risk of additional data loss.
      4. Warranty concerns: Opening up or tampering with a NAS device may void its warranty. If your device is still under warranty, it is advisable to seek professional assistance to prevent any warranty-related issues.

      While some individuals with technical expertise and experience may be able to perform basic data recovery tasks on a NAS device, it is generally recommended to consult professional data recovery services for more complex cases or situations where the data is critical.

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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 are the advantages of using a NAS QNAP TES-3085U(QES) over regular external hard drives in terms of data storage and accessibility?

    There are several advantages of using a NAS (Network Attached Storage) like the QNAP TES-3085U(QES) over regular external hard drives in terms of data storage and accessibility:

    1. Centralized storage: A NAS provides a centralized storage solution where multiple users can access and share files from a single location. This eliminates the need for each user to have their own external hard drive, simplifying data management.
    2. Increased storage capacity: NAS devices typically offer larger storage capacities compared to individual external hard drives. The QNAP TES-3085U(QES) is a rackmount NAS that supports up to 30 hard drives, allowing for massive storage capacity expansion.
    3. Redundancy and data protection: NAS systems often support various RAID configurations, providing redundancy and data protection. In case of a hard drive failure, the data remains accessible and can be easily recovered. RAID configurations like RAID 1, RAID 5, or RAID 6 can ensure data integrity and minimize the risk of data loss.
    4. Data accessibility and sharing: NAS devices enable seamless data accessibility and sharing across multiple devices and platforms. Users can access files remotely over the internet, allowing for easy collaboration and file sharing among team members or even accessing files on the go.
    5. Advanced features and applications: NAS devices like the QNAP TES-3085U(QES) offer a wide range of advanced features and applications. These include media streaming, backup solutions, virtualization support, surveillance capabilities, and more. These additional features enhance the functionality and versatility of the NAS beyond simple data storage.
    6. Scalability: NAS systems are highly scalable, allowing for easy expansion of storage capacity as your data needs grow. You can add more hard drives or even connect additional NAS units to create a larger storage pool without disrupting data accessibility.
    7. Data backup and synchronization: NAS devices often come with built-in backup and synchronization features. This enables automated backups of critical data and synchronization across multiple devices, ensuring data consistency and minimizing the risk of data loss.

    Overall, a NAS like the QNAP TES-3085U(QES) offers centralized storage, increased capacity, data protection, accessibility, advanced features, and scalability, making it a more efficient and reliable solution for data storage and accessibility compared to regular external hard drives.

  • How does a NAS QNAP TES-3085U(QES) provide better data security and backup options compared to regular external hard drives?

    The NAS QNAP TES-3085U(QES) provides several advantages in terms of data security and backup options compared to regular external hard drives. Here are some key points:

    1. Redundancy: The NAS offers various RAID configurations (e.g., RAID 0, 1, 5, 6, 10, 50, 60) that allow for data redundancy. This means that even if one or more drives fail, your data remains intact and accessible. Regular external hard drives typically lack such redundancy.
    2. Scalability: The NAS can accommodate multiple hard drives, allowing for easy scalability and increased storage capacity. You can start with a few drives and expand as your data grows. In contrast, regular external hard drives have fixed storage capacities and limited scalability options.
    3. Network Access: The NAS is connected to your network, enabling multiple users to access and share files simultaneously. It provides centralized storage accessible from various devices like computers, laptops, smartphones, and tablets. Regular external hard drives, on the other hand, are typically connected directly to a single device and not easily shareable.
    4. Data Protection Features: The QNAP NAS offers advanced data protection features such as snapshot technology, which allows you to take point-in-time snapshots of your data. This feature enables quick recovery in case of accidental file deletion or modification. Additionally, the NAS supports encryption, ensuring that your data remains secure even if the drives are stolen or compromised. Regular external hard drives generally lack these advanced data protection features.
    5. Backup Options: The NAS provides various backup options such as scheduled backups, real-time remote replication, and cloud backup integration. You can easily configure automatic backups to external drives, remote servers, or cloud storage services. This ensures that your data is regularly backed up and protected against data loss. Regular external hard drives usually require manual backups and lack the flexibility of automated backup options.

    Overall, the NAS QNAP TES-3085U(QES) offers better data security and backup options compared to regular external hard drives by providing redundancy, scalability, network access, advanced data protection features, and various backup options.

  • In what ways does a NAS QNAP TES-3085U(QES) offer enhanced performance and scalability compared to traditional external hard drives for data storage and sharing purposes?

    The NAS QNAP TES-3085U(QES) offers several ways in which it enhances performance and scalability compared to traditional external hard drives for data storage and sharing purposes:

    1. Network Attached Storage (NAS) Functionality: The QNAP TES-3085U(QES) is designed specifically for storage and sharing purposes. It is equipped with multiple hard drive bays, allowing for the installation of multiple hard drives in a single device. This enables greater storage capacity and flexibility compared to traditional external hard drives.
    2. RAID Support: The NAS supports various RAID configurations, including RAID 0, 1, 5, 6, 10, 50, 60, and JBOD. RAID provides data redundancy and improves performance by distributing data across multiple hard drives. This ensures data integrity and allows for faster data access and retrieval compared to a single external hard drive.
    3. High-Speed Connectivity: The NAS is equipped with high-speed connectivity options such as multiple Gigabit Ethernet ports and optional 10GbE add-on cards. This allows for faster data transfer speeds and seamless access to stored data from multiple devices simultaneously.
    4. Scalability: The QNAP TES-3085U(QES) offers scalability by supporting expansion units, which can be connected to the NAS to increase storage capacity as needed. This makes it easier to accommodate growing data storage requirements without the need to purchase additional external hard drives.
    5. Advanced File Sharing Features: The NAS provides advanced file sharing features such as file-level encryption, access controls, and user quotas. These features enhance data security and allow for efficient collaboration and sharing of files across a network.
    6. Centralized Management: The QNAP TES-3085U(QES) offers a centralized management interface that allows users to easily configure and manage storage settings, user access permissions, and other NAS features. This simplifies the administration and maintenance of the storage system compared to managing multiple external hard drives separately.

    Overall, the NAS QNAP TES-3085U(QES) offers enhanced performance and scalability compared to traditional external hard drives, making it a more efficient and reliable solution for data storage and sharing purposes.

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