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

QNAP TES-3085U(QTS) 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(QTS).

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

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 disk health monitoring and analysis help in preventing potential data loss on NAS QNAP TES-3085U(QTS) devices?

Regular disk health monitoring and analysis can help in preventing potential data loss on NAS QNAP TES-3085U(QTS) devices in the following ways:

  1. Early detection of disk failures: Disk health monitoring tools can constantly monitor the SMART (Self-Monitoring, Analysis, and Reporting Technology) data of the disks in the NAS. This allows for the early detection of any signs of disk failure, such as bad sectors, high temperature, or increased error rates. By identifying these issues early on, you can take proactive measures like replacing the failing disk before it completely fails and causes data loss.
  2. Predictive failure analysis: Some disk health monitoring tools can analyze the historical SMART data and predict the likelihood of a disk failure in the near future. This allows you to proactively replace the predicted failing disks before they actually fail, minimizing the risk of data loss.
  3. RAID array monitoring: If you have set up a RAID configuration on your NAS, disk health monitoring can help in monitoring the status of the RAID array. It can alert you if any disks in the array fail or if there are any issues with the RAID array itself. This allows you to take immediate action to rebuild the array or replace the failed disks, ensuring data integrity and preventing data loss.
  4. Temperature monitoring: Overheating can be a common cause of disk failures. Disk health monitoring tools can monitor the temperature of the disks and alert you if they exceed safe operating limits. This allows you to take corrective actions like improving the cooling system or relocating the NAS to a cooler environment, preventing potential data loss due to overheating.
  5. Regular data scrubbing: Disk health monitoring tools can also perform regular data scrubbing, which involves reading and verifying the integrity of data stored on the disks. This helps in identifying and correcting any silent data corruption issues before they lead to data loss.
  6. Backup monitoring: In addition to disk health monitoring, it is crucial to regularly monitor the status and health of your backup system. This ensures that your backups are up to date, accessible, and in a healthy state, providing an additional layer of protection against data loss.

By regularly monitoring and analyzing the health of the disks in your NAS QNAP TES-3085U(QTS) device, you can proactively identify and address any potential issues that could lead to data loss. This helps in maintaining the reliability and integrity of your data storage system.

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

Although NAS TES-3085U(QTS) 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(QTS). 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(QTS) 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(QTS) 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(QTS), feel free to leave a comment!
  • Wilson Lowe
    Wilson Lowe 14.09.2023 22:50 #
    Can data recovery from a NAS QNAP TES-3085U(QTS) device be done if the device is experiencing intermittent connectivity issues?
    • Hetman Software
      Hetman Software 14.09.2023 22:59 #

      Data recovery from a NAS QNAP TES-3085U(QTS) device can still be possible even if the device is experiencing intermittent connectivity issues. However, the success of the recovery process will depend on the extent of the connectivity issues and the underlying cause.

      Here are a few steps you can try to recover data from the device:

      1. Check network connectivity: Ensure that the network cables are securely connected and try connecting the NAS to a different network port or switch. Also, verify that the network settings on the NAS are correctly configured.
      2. Restart the NAS: Power off the NAS, wait for a few minutes, and then power it back on. This simple step can sometimes resolve connectivity issues.
      3. Update firmware: Ensure that the NAS firmware is up to date. QNAP regularly releases firmware updates that may address known connectivity issues.
      4. Use a direct connection: If possible, connect the NAS directly to a computer using an Ethernet cable. This bypasses any potential network issues and allows you to access the data directly.
      5. Use data recovery software: If the intermittent connectivity issues prevent you from accessing the data directly, you can try using data recovery software. Install the software on a computer and connect the NAS to the computer. The software may be able to scan the NAS and recover the data even with connectivity issues.
      6. Seek professional help: If the above steps do not work or if the data on the NAS is critical, it is advisable to seek professional data recovery services. They have specialized tools and expertise to handle complex data recovery scenarios, including devices with connectivity issues.

      Remember to consult the QNAP support website or contact their technical support for specific guidance related to your NAS model.

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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

  • How does the NAS QNAP TES-3085U(QTS) operate with Wi-Fi standard? Does it have built-in Wi-Fi capabilities or does it require additional hardware or adapters?

    The NAS QNAP TES-3085U (QTS) does not have built-in Wi-Fi capabilities. It operates primarily as a network-attached storage device, providing storage and data management functions over a wired network connection.

    If you wish to connect the NAS to a Wi-Fi network, you would need to use an additional hardware device such as a Wi-Fi adapter or a Wi-Fi router. This would involve connecting the NAS to the Wi-Fi adapter or router using an Ethernet cable, and then configuring the Wi-Fi settings on the adapter or router to connect to your wireless network.

    It's important to note that the NAS itself does not directly support Wi-Fi, so you would need to rely on external hardware to enable wireless connectivity.

  • What Wi-Fi standards are supported by the NAS QNAP TES-3085U(QTS)? Does it support the latest Wi-Fi standards such as Wi-Fi 6 (802.11ax) or is it limited to older standards?

    The NAS QNAP TES-3085U(QTS) does not support Wi-Fi directly. It is a network-attached storage device designed to connect to a wired network using Ethernet cables. Therefore, it does not support any Wi-Fi standards, including Wi-Fi 6 (802.11ax) or older standards. To connect to the NAS, you would need to use a wired Ethernet connection.

  • Are there any specific configuration or setup requirements for operating the NAS QNAP TES-3085U(QTS) with Wi-Fi standard? Are there any limitations or considerations to keep in mind when using Wi-Fi connectivity with this NAS model?

    The NAS QNAP TES-3085U(QTS) does not have built-in Wi-Fi capabilities. It relies on wired Ethernet connections for network connectivity. Therefore, it cannot be directly connected to a Wi-Fi network.

    However, you can still access the NAS wirelessly by connecting it to a Wi-Fi router using an Ethernet cable. The Wi-Fi router will handle the wireless connectivity, and the NAS will be accessible over the network.

    When using Wi-Fi connectivity with this NAS model, consider the following limitations and considerations:

    1. Speed and Performance: Wi-Fi connections may have lower speeds and higher latency compared to wired Ethernet connections. This can affect the performance of data transfer and access speeds to the NAS.
    2. Network Interference: Wi-Fi signals can be affected by interference from other devices or physical obstacles like walls. Ensure that the Wi-Fi router is placed in an optimal location to minimize interference.
    3. Security: Wi-Fi networks can be more vulnerable to unauthorized access compared to wired networks. It is essential to secure your Wi-Fi network with strong passwords and encryption to protect your NAS and data.
    4. Range: The range of Wi-Fi signals may vary depending on the router and environmental factors. Ensure that the NAS is within the range of your Wi-Fi network for a stable connection.
    5. Network Stability: Wi-Fi connections can be prone to fluctuations or drops in signal strength. This can disrupt access to the NAS. Consider using a wired Ethernet connection for critical or high-bandwidth tasks to ensure stability.

    Overall, while using Wi-Fi connectivity with the QNAP TES-3085U(QTS) NAS, it is important to be aware of the limitations of wireless networks and take necessary measures to optimize performance and security.

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