How to Avoid Data Loss on NAS Thecus N12850RU and Restore Files That Were Deleted

Has your NAS Thecus N12850RU suddenly lost its network drive and you’re unsure what to do next? Did the RAID array collapse, making your files inaccessible? Is the device throwing errors during startup? Perhaps you accidentally rebuilt the RAID array or several hard drives failed at the same time?

How to Avoid Data Loss on NAS Thecus N12850RU and Restore Files That Were Deleted

Thecus N12850RU NAS Data Recovery in 2025

In this step-by-step tutorial, we’ll show you how to rebuild your RAID and recover data from an N12850RU. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

How to Avoid Data Loss on NAS Thecus N12850RU and Restore Files That Were Deleted

RAID Recovery™ 2.8
Recover data from damaged RAID arrays inaccessible from a computer.
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Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like Thecus often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

Can the use of specific data recovery software or services impact the success rate of data retrieval from NAS Thecus N12850RU devices?

Yes, the use of specific data recovery software or services can impact the success rate of data retrieval from NAS Thecus N12850RU devices. Data recovery software or services are designed to recover lost or deleted data from various storage devices, including NAS devices.

However, the success rate of data retrieval depends on several factors such as the cause of data loss, the extent of damage to the NAS device, the quality and effectiveness of the data recovery software or service, and the expertise of the person performing the recovery.

It is important to choose reliable and reputable data recovery software or service providers who have experience in dealing with NAS devices and have a good track record of successful recoveries. Additionally, it is recommended to stop using the NAS device immediately after data loss to prevent further damage and increase the chances of successful data retrieval.

How to Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS N12850RU can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

  1. Power off the NAS and disconnect it from the power source.

    WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.

  2. Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.

  3. Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.

  4. Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

    Go to view
    How to Order Remote Data Recovery

    How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

Hetman Raid Recovery

This program restores data from damaged RAID arrays and is fully compatible with Thecus N12850RU. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

Go to view
How to recover data from a Thecus

How to recover data from a Thecus

N12850RU has 12 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;

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

  • Overwriting during the recovery process;
  • Additional data loss caused by bad sectors;
  • User errors.

To create a disk image, follow these steps:

  1. Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.

  2. In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.

  3. When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.

    Hetman RAID Recovery: Image Creation Wizard
  4. Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

    Hetman RAID Recovery: Choose a disk or save the image via FTP

Where Are the User’s Files Actually Stored?

The Thecus N12850RU 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.

RAID Recovery Software: Detailed Comparison

Product Operating system RAID controller support Supported file systems Virtual RAID controller support Data recovery from damaged RAID File preview
Hetman RAID Recovery Windows, Linux, MacOS Yes, over 100 controllers FAT, exFAT, NTFS, ReFS, APFS, HFS+, Ext4, Ext3, Ext2, ReiserFS, Btrfs, VMFS, Hikvision, XFS, UFS, ZFS Yes Yes Yes
DiskInternals RAID Recovery Windows Yes, over 10 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
R-Studio Windows, Mac, Linux Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
UFS Explorer RAID Recovery Windows, Mac, Linux Yes, over 100 controllers FAT, NTFS, Ext2/3/4, HFS+ Yes Yes Yes
EaseUS Data Recovery Windows Yes, over 20 controllers FAT, NTFS, Ext2/3/4, HFS+ No Yes Yes
ReclaiMe Free RAID Recovery Windows 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 N12850RU, feel free to leave a comment!
  • Porter Jessop
    Porter Jessop 13.09.2023 07:56 #
    Are there any specific backup software recommended for data recovery from NAS Thecus N12850RU devices?
    • Hetman Software
      Hetman Software 13.09.2023 08:59 #

      There are several backup software options that are commonly recommended for data recovery from NAS Thecus N12850RU devices. Some popular choices include:

      1. Acronis True Image: Acronis True Image is a comprehensive backup and recovery software that supports NAS devices like Thecus N12850RU. It offers features like full image backups, file/folder backups, and incremental backups.
      2. EaseUS Todo Backup: EaseUS Todo Backup is another widely used backup software that supports NAS devices. It provides features like system backups, disk/partition backups, and file/folder backups. It also has a user-friendly interface.
      3. NovaBACKUP: NovaBACKUP is a backup and recovery software that supports NAS devices, including Thecus N12850RU. It offers features like image backups, file backups, and disaster recovery options.
      4. Veeam Backup & Replication: Veeam Backup & Replication is a powerful backup and recovery software designed for virtual environments. It supports NAS devices and provides features like image-based backups, file-level recovery, and replication.

      It's important to note that while these software options are commonly recommended, the choice ultimately depends on your specific requirements and preferences. It's recommended to evaluate the features, compatibility, and user reviews of each software before making a decision.

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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 benefits of using a NAS Thecus N12850RU to save photos from a digital camera compared to other storage options?

    There are several benefits of using a NAS (Network Attached Storage) like Thecus N12850RU to save photos from a digital camera compared to other storage options:

    1. Centralized storage: A NAS allows you to store all your photos in one central location, making it easy to access and manage your photo library. It eliminates the need to store photos on multiple devices or external hard drives.
    2. Data protection: NAS devices often come with built-in RAID (Redundant Array of Independent Disks) functionality, which provides data redundancy and protection against drive failures. This ensures that your photos are safe and accessible even if a drive fails.
    3. Easy sharing and collaboration: With a NAS, you can easily share your photo library with others on your network. It allows you to grant access to specific folders or files, making it convenient for collaborative projects or sharing photos with family and friends.
    4. Remote access: Many NAS devices offer remote access capabilities, allowing you to access your photo library from anywhere with an internet connection. This means you can view or download your photos even when you're away from home.
    5. Scalability: NAS devices often support multiple hard drives and offer expandable storage options. This means you can start with a smaller capacity and easily add more storage as your photo collection grows.
    6. Data backup: NAS devices can be configured to automatically back up your photos to external drives or cloud storage services. This provides an additional layer of protection against data loss due to hardware failures or other unforeseen circumstances.
    7. Advanced features: NAS devices like Thecus N12850RU often come with advanced features such as multimedia streaming, transcoding, and mobile apps. These features enhance the overall photo management experience and allow you to stream your photos to various devices or access them on the go.

    Overall, using a NAS like Thecus N12850RU for storing photos offers convenience, data protection, sharing capabilities, and scalability, making it an ideal choice for photographers or anyone with a large photo collection.

  • How can the NAS Thecus N12850RU be set up and configured to efficiently store and organize photos from a digital camera?

    To efficiently store and organize photos from a digital camera on the NAS Thecus N12850RU, you can follow these steps:

    1. Connect the NAS to your network: Start by connecting the NAS to your network using an Ethernet cable. Ensure that the NAS is connected to a power source and turned on.
    2. Access the NAS web interface: Open a web browser on your computer and enter the IP address of the NAS in the address bar. This will take you to the web interface of the NAS.
    3. Set up storage: Create a storage pool on the NAS to allocate storage space for your photos. This can be done through the web interface by navigating to the storage configuration section. Follow the instructions to create a storage pool and define its settings.
    4. Create a shared folder: Once the storage pool is set up, create a shared folder specifically for your photos. This folder will be accessible to all devices on your network. Assign appropriate permissions to control access to the folder.
    5. Enable file services: Enable the necessary file services on the NAS, such as SMB/CIFS, NFS, or FTP, to allow devices to connect and access the shared folder. This can be done through the web interface by navigating to the file services settings.
    6. Configure backup: Set up a backup plan to ensure the safety of your photos. This can include regular backups to an external storage device or cloud storage. The NAS may have built-in backup features or you can use third-party backup software.
    7. Install photo management software: Install a photo management software or application on your computer or mobile device. There are various options available, such as Adobe Lightroom, Google Photos, or Thecus Photo Server. Configure the software to point to the shared folder on the NAS as the location for storing and organizing photos.
    8. Import and organize photos: Connect your digital camera to your computer and use the photo management software to import the photos directly to the shared folder on the NAS. Organize the photos into albums or folders within the software to maintain a structured organization.
    9. Access and view photos: Once the photos are stored and organized on the NAS, you can access and view them from any device connected to your network. Use the photo management software or any file explorer to browse and view the photos stored on the NAS.

    By following these steps, you can efficiently store and organize photos from a digital camera on the NAS Thecus N12850RU, ensuring easy access and backup of your precious memories.

  • Are there any specific features or functionalities of the NAS Thecus N12850RU that make it particularly suitable for storing and managing a large collection of photos from a digital camera?

    Yes, the NAS Thecus N12850RU has several features and functionalities that make it suitable for storing and managing a large collection of photos from a digital camera:

    1. High Storage Capacity: The N12850RU is a rackmount NAS device that supports up to 12 hard drives, allowing for a massive storage capacity. This is ideal for storing a large number of high-resolution photos.
    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 protection against drive failures, ensuring the safety of your valuable photo collection.
    3. High-Speed Data Transfer: The N12850RU is equipped with multiple Gigabit Ethernet ports, allowing for fast data transfer speeds. This is beneficial when transferring large photo files from the digital camera to the NAS.
    4. Advanced Data Management: The NAS comes with advanced data management features such as snapshot technology, which allows you to take point-in-time snapshots of your photo collection. This is useful for data recovery or reverting to previous versions of your photos.
    5. Multimedia Support: The N12850RU has built-in multimedia server capabilities, supporting popular media streaming protocols like DLNA, UPnP, and Plex. You can easily access and view your photos on various devices such as smart TVs, smartphones, and tablets.
    6. Backup and Sync: The NAS supports various backup and synchronization options, including remote replication, cloud backup, and Time Machine support for Mac users. These features ensure that your photo collection is securely backed up and easily accessible from multiple locations.
    7. User-Friendly Interface: Thecus provides an intuitive web-based interface for managing the NAS. It offers easy-to-use file management, folder permissions, and user access controls, making it convenient to organize and manage your photo collection.

    Overall, the high storage capacity, RAID support, fast data transfer speeds, advanced data management features, multimedia support, backup and sync options, and user-friendly interface of the Thecus N12850RU make it well-suited for storing and managing a large collection of photos from a digital camera.