Steps to Extract Data from a RAID Disk if NAS TerraMaster T12-423 Does Not Power Up

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS TerraMaster T12-423
• How to Remove Hard Disks from Your NAS and Connect Them to a PC
  • Step-by-Step Data Recovery with Hetman RAID Recovery
  • How to Safely Recover Data from Disk Images
  • Where Are the User’s Files Actually Stored?
  • RAID Recovery Software: Detailed Comparison

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.

Are there any known limitations or issues related to specific NAS TerraMaster T12-423 device models that can lead to data loss?

While I couldn't find any specific limitations or issues related to the NAS TerraMaster T12-423 device models that can lead to data loss, it's important to note that data loss can occur in any storage device under certain circumstances. Here are some general considerations to keep in mind:

1. Hardware Failure: Like any electronic device, hard drives can fail over time due to various factors such as mechanical issues, power surges, or manufacturing defects. Regular backups and redundancy measures can help mitigate the risk of data loss.
2. User Error: Accidental deletion, formatting the wrong drive, or improper configuration can result in data loss. It's crucial to exercise caution and double-check actions when managing data on a NAS device.
3. Software or Firmware Issues: Bugs, compatibility problems, or outdated firmware can potentially lead to data loss. Keeping the device's firmware up to date and regularly checking for software updates can help prevent such issues.
4. Network Vulnerabilities: NAS devices are connected to the network, making them potential targets for cyberattacks. Ensuring that the device's security features are properly configured, using strong passwords, and keeping the network secure can help protect against data loss due to unauthorized access.
5. Environmental Factors: Environmental hazards like fire, flood, or extreme temperatures can damage the NAS device and result in data loss. Storing the device in a safe and controlled environment can minimize these risks.

It's always recommended to have a backup strategy in place, such as maintaining multiple copies of important data on different storage devices or utilizing cloud storage services.

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

Although the NAS T12-423 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.

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   How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with TerraMaster T12-423. 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.

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How to recover data from a TerraMaster

T12-423 has 12 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.

   

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.

   

Where Are the User’s Files Actually Stored?

The TerraMaster T12-423 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