How to recover data from QNAP TL-R1620Sdc 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 TL-R1620Sdc

QNAP TL-R1620Sdc NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from TL-R1620Sdc.

How to recover data from NAS QNAP TL-R1620Sdc

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.

Can utilizing redundant network connections or link aggregation protocols mitigate data loss risks for NAS QNAP TL-R1620Sdc devices?

Yes, utilizing redundant network connections or link aggregation protocols can mitigate data loss risks for NAS QNAP TL-R1620Sdc devices.

Redundant network connections involve setting up multiple network connections between the NAS device and the network infrastructure. This can be achieved by connecting the NAS to multiple network switches or routers using different network cables. If one network connection fails, the NAS can still communicate with the network through the other connections, ensuring uninterrupted access to data.

Link aggregation protocols, such as IEEE 802.3ad (LACP) or QNAP's QNAP Link Aggregation (QNA) technology, allow multiple network connections to be combined into a single logical connection. This provides increased bandwidth and redundancy. If one network connection fails, the NAS can automatically switch to the remaining active connections, minimizing the risk of data loss.

By implementing redundant network connections or link aggregation protocols, NAS QNAP TL-R1620Sdc devices can enhance network reliability, reduce the chances of data loss due to network failures, and ensure continuous access to stored data.

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

Although NAS TL-R1620Sdc 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 TL-R1620Sdc. 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

TL-R1620Sdc has 16 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 TL-R1620Sdc 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 TL-R1620Sdc, feel free to leave a comment!
  • Darby Perry
    Darby Perry 15.09.2023 09:42 #
    Can data recovery from a NAS QNAP TL-R1620Sdc device be done in cases of RAID system failures?
    • Hetman Software
      Hetman Software 15.09.2023 09:59 #

      Yes, data recovery from a QNAP TL-R1620Sdc NAS device can be done in cases of RAID system failures. However, the process can be more complex compared to recovering data from a single disk failure. RAID systems distribute data across multiple disks, so if one or more disks fail, it can affect the entire system's functionality and data accessibility.

      In such cases, it is recommended to contact a professional data recovery service that specializes in RAID recovery. These experts have the knowledge, tools, and experience to handle complex RAID configurations and recover data from failed RAID systems. They can assess the situation, identify the cause of the failure, and work on recovering the data from the NAS 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 are the necessary steps to connect an IP camera to a QNAP TL-R1620Sdc NAS?

    To connect an IP camera to a QNAP TL-R1620Sdc NAS, follow these necessary steps:

    1. Ensure that your IP camera and QNAP NAS are connected to the same network.
    2. Log in to your QNAP NAS using the administrator account.
    3. Open the QTS (QNAP Turbo NAS System) web interface by entering the NAS IP address in a web browser.
    4. Navigate to "App Center" and search for "Surveillance Station" in the search bar.
    5. Install the Surveillance Station application from the App Center.
    6. Once installed, open the Surveillance Station application.
    7. In the "Surveillance Station" menu, click on "Camera" to access the camera settings.
    8. Click on the "Add" button to add a new camera.
    9. Select the "IP Camera" option and click "Next."
    10. Enter a name for the camera and provide the necessary details such as the IP address, port number, username, and password of the IP camera.
    11. Click "Test Connection" to ensure that the NAS can communicate with the IP camera.
    12. If the test is successful, click "Next" to proceed.
    13. Configure the camera settings, such as video resolution, recording schedule, and motion detection settings.
    14. Once the settings are configured, click "Next" to complete the camera setup.
    15. The QNAP NAS will start connecting to the IP camera and begin recording video footage.

    Note: The specific steps may vary slightly depending on the version of QTS and Surveillance Station installed on the QNAP NAS.

  • Are there any specific compatibility requirements or settings to consider when connecting an IP camera to a QNAP TL-R1620Sdc NAS?

    When connecting an IP camera to a QNAP TL-R1620Sdc NAS, there are a few compatibility requirements and settings to consider:

    1. Camera Compatibility: Ensure that the IP camera you are using is compatible with the QNAP NAS. QNAP provides a list of supported IP camera models on their website. Verify if your camera model is listed and supported.
    2. Network Configuration: Ensure that the IP camera and the QNAP NAS are on the same network subnet. This means they should have similar IP addresses and subnet masks. The QNAP NAS should also have a static IP address assigned to it.
    3. Camera Configuration: Configure the IP camera to stream video using a compatible format supported by the QNAP NAS. Commonly supported formats include H.264 and MJPEG. Refer to the camera's user manual for instructions on configuring the video stream format.
    4. NAS Configuration: On the QNAP NAS, install and configure the Surveillance Station app. This app allows you to manage and view the IP camera feeds. Follow the instructions provided by QNAP to set up the Surveillance Station app and add your IP camera to the NAS.
    5. Network Ports: Ensure that the necessary network ports are open and forwarded on your router/firewall to allow communication between the IP camera and the QNAP NAS. The required ports may vary depending on the camera model and NAS configuration. Typically, ports 80 (HTTP) and 554 (RTSP) need to be open for video streaming.
    6. Bandwidth and Storage Considerations: Take into account the bandwidth and storage requirements of the IP camera when connecting it to the QNAP NAS. Ensure that your network and NAS storage capacity can handle the video streams and recordings from the camera.

    It is recommended to consult the user manuals and documentation provided by both the IP camera manufacturer and QNAP for detailed instructions specific to your camera model and NAS configuration.

  • Can the QNAP TL-R1620Sdc NAS support multiple IP cameras, and if so, what is the maximum number of cameras it can handle?

    Yes, the QNAP TL-R1620Sdc NAS can support multiple IP cameras. It has a maximum camera support of 16 channels.

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