Extracting Data from a RAID Disk When NAS TerraMaster U8-322-9100 is Not Starting: Step-by-Step Guide

Has your NAS TerraMaster U8-322-9100 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?

Extracting Data from a RAID Disk When NAS TerraMaster U8-322-9100 is Not Starting: Step-by-Step Guide
Data Recovery Tool

TerraMaster U8-322-9100 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 U8-322-9100. We’ll walk through the most common causes of failure and demonstrate proven methods to restore files from a lost or degraded RAID array.

Extracting Data from a RAID Disk When NAS TerraMaster U8-322-9100 is Not Starting: Step-by-Step Guide

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 TerraMaster 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.

How can a NAS TerraMaster U8-322-9100 device's power management settings impact data availability and potential loss?

The power management settings of a NAS (Network Attached Storage) device like the TerraMaster U8-322-9100 can have a significant impact on data availability and potential loss. Here are a few ways in which power management settings can affect data:

  1. Power Outages: If the power management settings are not properly configured, sudden power outages or fluctuations can result in the NAS device shutting down unexpectedly. This can lead to data loss or corruption if the device was in the middle of a write operation or if the file system was not properly synced.
  2. Scheduled Power Off/On: Some NAS devices allow users to schedule automatic power off and power on events. If the power off event is scheduled during a critical data transfer or backup process, it can result in incomplete or interrupted operations, potentially leading to data loss or inconsistency.
  3. Disk Spindown: Power management settings often include options to spin down the hard disk drives (HDDs) when they are not in use for a certain period. While this helps in reducing power consumption and prolonging HDD lifespan, it can introduce delays when accessing data. If the spin-down time is set too aggressively, it can cause delays in accessing files, especially if multiple users are accessing the NAS simultaneously.
  4. Wake-on-LAN: Wake-on-LAN (WoL) is a feature that allows the NAS device to be woken up from a sleeping or powered-off state using a network signal. If the power management settings are not properly configured or if the WoL feature is not enabled, it can result in the NAS being inaccessible until manually powered on. This can cause downtime and impact data availability.

To mitigate the potential impact on data availability and loss, it is important to carefully configure the power management settings of the NAS device. This may involve setting appropriate spin-down times, scheduling power off/on events during non-critical periods, enabling WoL if required, and ensuring proper backup and redundancy measures are in place to protect against unexpected power interruptions or failures.

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

Although the NAS U8-322-9100 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 TerraMaster U8-322-9100. 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 TerraMaster

How to recover data from a TerraMaster

U8-322-9100 has 8 HDD slots, and it supports the following array types:

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

NAS supports:

  • Ext2;
  • Ext3;
  • Ext4;
  • Btrfs;

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 TerraMaster U8-322-9100 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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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 U8-322-9100, feel free to leave a comment!
    Reply
  • Oliver Barnardiston
    Oliver Barnardiston 10.09.2023 07:49 #
    Can data recovery from a NAS TerraMaster U8-322-9100 device be performed if there are issues with the operating system or firmware?
    Reply
    • Hetman Software
      Hetman Software 10.09.2023 07:59 #

      Yes, data recovery can still be performed on a NAS TerraMaster U8-322-9100 device even if there are issues with the operating system or firmware. In such cases, the data recovery process typically involves accessing the hard drives directly instead of relying on the NAS device's software interface.

      To recover data from a NAS device with OS or firmware issues, you can follow these general steps:

      1. Remove the hard drives from the TerraMaster U8-322-9100 device.
      2. Connect the hard drives to a computer using a compatible interface (such as SATA or USB).
      3. Use data recovery software to scan and recover the files from the connected hard drives. There are various data recovery tools available, both free and paid, that can help in this process.
      4. Select the files you want to recover and save them to a different storage device, such as an external hard drive or another NAS device.

      It's important to note that if the data loss is due to physical damage or hardware failure of the hard drives themselves, it may be necessary to seek professional data recovery services to increase the chances of successful recovery.

      Reply
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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 key features and specifications of the NAS TerraMaster U8-322-9100 that make it suitable for use as central storage?

    The NAS TerraMaster U8-322-9100 is a powerful and feature-rich storage solution designed for use as central storage. Some key features and specifications that make it suitable for this purpose include:

    1. Storage Capacity: The U8-322-9100 comes with eight drive bays, allowing for a large storage capacity. It supports both 3.5-inch and 2.5-inch SATA drives, providing flexibility in terms of storage options.
    2. High Performance: This NAS is equipped with a powerful Intel Xeon D-2142IT processor and 16GB DDR4 ECC RAM, ensuring fast and efficient data processing. It also supports link aggregation and supports up to 10GbE network speeds, enabling high-speed data transfers.
    3. Data Protection: The U8-322-9100 offers various data protection features, including RAID support (RAID 0, 1, 5, 6, 10, and JBOD), snapshot technology, and multiple backup options (local, remote, and cloud). These features help safeguard your data against hardware failures and data loss.
    4. Scalability: With eight drive bays, the U8-322-9100 provides ample room for storage expansion. It supports hot-swapping of drives, allowing for easy addition or replacement of drives without interrupting the system's operation.
    5. Advanced File System: This NAS utilizes the Btrfs file system, which offers advanced features such as data integrity checks, efficient snapshots, and flexible storage allocation. Btrfs helps enhance data protection and allows for efficient data management.
    6. Versatile Connectivity: The U8-322-9100 offers a range of connectivity options, including four Gigabit Ethernet ports and two 10GbE SFP+ ports, enabling seamless integration into different network environments. It also has multiple USB 3.0 ports for connecting external devices.
    7. User-Friendly Interface: The NAS runs on the TerraMaster TOS operating system, which provides an intuitive and user-friendly interface for easy management and configuration. It also supports various apps and services, including media servers, file sharing, and cloud synchronization.

    Overall, the NAS TerraMaster U8-322-9100 combines high performance, data protection, scalability, and versatile connectivity, making it an ideal choice for central storage in both home and business environments.

  • How does the NAS TerraMaster U8-322-9100 facilitate centralized storage management and data sharing across multiple devices or users?

    The NAS TerraMaster U8-322-9100 facilitates centralized storage management and data sharing across multiple devices or users through various features and functionalities. Here are some ways it accomplishes this:

    1. Network Attached Storage (NAS): The TerraMaster U8-322-9100 is a NAS device, which means it provides a centralized storage solution accessible over a network. It connects to your local network and allows multiple devices or users to access and share data stored on it.
    2. Multiple Drive Bays: The U8-322-9100 comes with eight drive bays, allowing you to install multiple hard drives or SSDs. This provides ample storage capacity for storing large amounts of data, and you can configure the drives in various RAID configurations for data redundancy and performance optimization.
    3. User and Group Management: The NAS supports user and group management, allowing you to create multiple user accounts and assign different access permissions to each user or group. This ensures that only authorized users can access specific files or folders, enhancing data security and privacy.
    4. File Sharing Protocols: The U8-322-9100 supports various file sharing protocols like SMB/CIFS, AFP, FTP, and NFS. These protocols enable seamless file sharing across different operating systems and devices, such as Windows, macOS, Linux, and mobile devices.
    5. Remote Access and Cloud Sync: With the TerraMaster U8-322-9100, you can access your files remotely over the internet. It offers remote access features like FTP, WebDAV, and a mobile app, allowing you to access and manage your files from anywhere. Additionally, it supports cloud synchronization, enabling you to sync your data with popular cloud storage services like Dropbox, Google Drive, or OneDrive.
    6. Data Backup and Snapshot: The NAS provides data backup features, allowing you to schedule automatic backups of your important files or folders to external drives or remote locations. It also supports snapshots, which capture the state of your data at a specific point in time, providing a quick and easy way to restore previous versions of files or recover from data loss.
    7. Media Server and Streaming: The U8-322-9100 can act as a media server, allowing you to stream multimedia content like videos, music, and photos to compatible devices such as smart TVs, media players, or gaming consoles. This enables convenient media sharing and streaming across your network.

    Overall, the TerraMaster U8-322-9100 combines storage capacity, user management, file sharing protocols, remote access, data backup, and media streaming capabilities to facilitate centralized storage management and data sharing across multiple devices or users.

  • Are there any specific considerations or requirements to keep in mind when setting up and configuring the NAS TerraMaster U8-322-9100 as central storage in a network environment?

    When setting up and configuring the NAS TerraMaster U8-322-9100 as central storage in a network environment, there are several considerations and requirements to keep in mind:

    1. Network Infrastructure: Ensure that your network infrastructure can support the NAS and its storage needs. This includes having sufficient network bandwidth, stable connections, and compatible network protocols.
    2. Storage Capacity: Determine the storage capacity required for your network environment. The TerraMaster U8-322-9100 supports up to eight hard drives, so plan the storage capacity based on your needs.
    3. RAID Configuration: Decide on the RAID configuration that suits your requirements. The NAS supports various RAID levels such as RAID 0, 1, 5, 6, 10, and JBOD. Choose the appropriate RAID level based on factors like data redundancy, performance, and storage efficiency.
    4. Security: Implement proper security measures to protect the data stored on the NAS. This includes setting up user accounts with strong passwords, enabling encryption for sensitive data, and configuring firewall rules to restrict unauthorized access.
    5. Backup Strategy: Develop a backup strategy to ensure data redundancy and protection against data loss. Consider options like scheduled backups to external drives, cloud backups, or replication to another NAS.
    6. Network Access: Configure network access to the NAS based on your requirements. Decide whether you want to allow access only within the local network or provide remote access over the internet. If remote access is needed, consider using secure VPN connections or enabling HTTPS access.
    7. User Permissions: Set up user permissions and access rights to control who can access and modify the data stored on the NAS. Assign appropriate permissions to different users or groups based on their roles and responsibilities.
    8. Network Services: The TerraMaster NAS supports various network services like FTP, SMB/CIFS, NFS, and more. Enable and configure the required services based on your network environment and user needs.
    9. Monitoring and Maintenance: Set up monitoring and maintenance routines to ensure the smooth operation of the NAS. Regularly check for firmware updates, monitor system performance, and configure alerts for critical events or failures.
    10. Scalability: Consider future scalability requirements when setting up the NAS. Ensure that the NAS can accommodate additional storage drives or expansion units if needed.

    It is recommended to refer to the manufacturer's documentation and user guides for detailed instructions specific to the TerraMaster U8-322-9100 NAS model.
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