How to Extract Data from a RAID Disk When NAS TerraMaster U12-722-2224 Won’t Power Up

Contents

• Why can’t ordinary software tools restore files from RAID?
• How to take hard disks out of the NAS and connect them to a PC?
  • Restoring data with Hetman RAID Recovery
  • Safe recovery from disk images
  • Where are user’s files stored?
  • Comparison of software for RAID recovery

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 TerraMaster also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.

Are there any compatibility issues or limitations when connecting NAS TerraMaster U12-722-2224 devices to different operating systems or platforms?

The TerraMaster U12-722-2224 NAS device is compatible with various operating systems and platforms, but there might be some limitations or compatibility issues depending on the specific requirements and features of each operating system or platform. Here are some potential considerations:

1. Windows: The TerraMaster NAS devices generally work seamlessly with Windows operating systems, including Windows 7, 8, and 10. However, certain advanced features like Windows ACL (Access Control List) permissions might require additional configuration or software installation.
2. macOS: TerraMaster NAS devices are compatible with macOS, allowing users to access and manage files using Finder or other file management applications. However, some advanced features like Time Machine backups might require specific setup or configuration.
3. Linux: TerraMaster NAS devices can be accessed from Linux systems, allowing file sharing and management. However, compatibility with specific Linux distributions and file systems might vary, and advanced features like NFS (Network File System) or Samba sharing might require additional configuration.
4. Mobile platforms: TerraMaster provides dedicated mobile apps for iOS and Android devices, allowing users to access files, stream media, and manage the NAS remotely. However, the availability and functionality of certain features might differ between the mobile apps and the desktop client applications.
5. Third-party software and protocols: TerraMaster NAS devices support various third-party software and protocols, such as Plex Media Server, Docker, FTP, and more. However, compatibility with specific versions or configurations of these software or protocols might vary.

It's always recommended to check the official documentation, user forums, or contact TerraMaster support for the most up-to-date information regarding compatibility and limitations when connecting the NAS device to different operating systems or platforms.

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

Although NAS U12-722-2224 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.

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   How to Order Remote Data Recovery

Restoring data with Hetman RAID Recovery

This program recovers data from damaged RAID arrays and is fully compatible with TerraMaster U12-722-2224. 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.

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How to recover data from a TerraMaster

U12-722-2224 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;

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 Tools – Save 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.

   

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.

   

Where are user’s files stored?

The TerraMaster U12-722-2224 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