How to recover data from Thecus N7700SAS 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 Thecus N7700SAS

Thecus N7700SAS NAS Data Recovery in 2024

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from N7700SAS.

How to recover data from NAS Thecus N7700SAS

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 Thecus 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 Thecus N7700SAS devices?

Regular disk health monitoring and analysis can help in preventing potential data loss on NAS Thecus N7700SAS devices in the following ways:

  1. Early detection of disk failures: By regularly monitoring the health of the disks, you can identify any signs of potential failures such as bad sectors, read/write errors, or abnormal temperature levels. This allows you to take proactive measures like replacing the failing disks before they completely fail and cause data loss.
  2. RAID array maintenance: NAS devices like Thecus N7700SAS often use RAID configurations to provide data redundancy and protection against disk failures. Regular disk health monitoring helps in identifying any issues with individual disks in the RAID array. By replacing the failing disks promptly, you can ensure the integrity and availability of your data.
  3. SMART monitoring: The Self-Monitoring, Analysis, and Reporting Technology (SMART) feature in hard drives provides detailed information about the drive's health and performance. By regularly analyzing the SMART data, you can identify any warning signs or anomalies that may indicate an impending disk failure. This enables you to take appropriate actions to prevent data loss.
  4. Predictive failure analysis: Some disk monitoring tools offer predictive failure analysis, which uses historical data and statistical models to predict the likelihood of disk failures. By analyzing this data, you can identify disks that are more likely to fail in the near future and replace them proactively, minimizing the risk of data loss.
  5. Data backup and recovery: Regular disk health monitoring can remind you to regularly backup your data and ensure that your backup systems are functioning properly. In case of a disk failure or data loss event, having up-to-date backups can significantly reduce the impact and recovery time.

Overall, regular disk health monitoring and analysis provide valuable insights into the condition of your NAS disks, allowing you to take preventive measures, maintain data integrity, and minimize the risk of potential data loss.

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

Although NAS N7700SAS 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 Thecus N7700SAS. 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 Thecus

How to recover data from a Thecus

N7700SAS has 7 HDD slots, and it supports the following array types:

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

NAS supports:

  • EXT3;
  • EXT4;
  • XFS;

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 Thecus N7700SAS network-attached storage keeps OS Linux 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 N7700SAS, feel free to leave a comment!
  • Derick Osgood
    Derick Osgood 14.09.2023 15:49 #
    Can data recovery from a NAS Thecus N7700SAS device be performed if there are issues with the motherboard or system board?
    • Hetman Software
      Hetman Software 14.09.2023 16:59 #

      Yes, data recovery from a NAS device like Thecus N7700SAS can still be performed even if there are issues with the motherboard or system board. In such cases, the data recovery process typically involves removing the hard drives from the NAS device and connecting them to a different system or a compatible NAS device. This allows the data recovery specialist to access and retrieve the data from the hard drives directly, bypassing any issues with the motherboard or system board.

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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

  • Can the NAS Thecus N7700SAS be operated with Wi-Fi standard, or does it require a wired Ethernet connection?

    The NAS Thecus N7700SAS does not have built-in Wi-Fi capability. It requires a wired Ethernet connection for operation.

  • What Wi-Fi standards are supported by the NAS Thecus N7700SAS, and what are their respective data transfer speeds?

    The Thecus N7700SAS NAS supports the following Wi-Fi standards:

    1. 802.11b: The maximum data transfer speed is 11 Mbps.
    2. 802.11g: The maximum data transfer speed is 54 Mbps.
    3. 802.11n: The maximum data transfer speed is 300 Mbps.

    It's important to note that the Thecus N7700SAS is primarily a network-attached storage device designed for wired connections. These Wi-Fi standards are supported through the use of an optional wireless adapter, which may not be included with the NAS by default. The data transfer speeds mentioned above are theoretical maximums and can vary based on various factors such as distance, interference, and network conditions.

  • Are there any specific configuration or setup requirements for using the Wi-Fi functionality on the NAS Thecus N7700SAS, such as security settings or compatibility with different Wi-Fi routers?

    The Thecus N7700SAS is a network-attached storage (NAS) device that does not have built-in Wi-Fi functionality. It is designed to be connected to a network via an Ethernet cable.

    If you want to connect the NAS to a Wi-Fi network, you would need to use a separate Wi-Fi bridge or adapter. These devices can be connected to the NAS via Ethernet and then connected to a Wi-Fi network, allowing the NAS to access the network wirelessly.

    The specific configuration and setup requirements for using a Wi-Fi bridge or adapter will depend on the device you choose. Each device may have its own setup process and compatibility requirements with different Wi-Fi routers.

    When setting up a Wi-Fi bridge or adapter, you would typically need to configure the device to connect to your Wi-Fi network by entering the network name (SSID) and password. The device may also have options for configuring security settings such as encryption type (WPA, WPA2) and authentication method (PSK, EAP).

    It is recommended to consult the user manual or documentation of the specific Wi-Fi bridge or adapter you choose to ensure compatibility and follow the correct setup process.

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