RAID Array Strategies for Optimal NAS Digiever DS-4212 UHD Data Recovery

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS Digiever DS-4212 UHD
• 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 Digiever 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 compatibility issues or limitations when connecting NAS Digiever DS-4212 UHD devices to different operating systems or platforms?

The Digiever DS-4212 UHD NAS devices are compatible with various operating systems and platforms, but there may be some limitations or compatibility issues depending on the specific configuration and requirements. Here are a few factors to consider:

1. Network Protocol Support: The DS-4212 UHD NAS devices typically support standard network protocols such as SMB/CIFS, NFS, FTP, and HTTP. These protocols are widely supported by different operating systems and platforms. However, it is essential to ensure that the specific operating system or platform you are using supports the required network protocol for accessing the NAS.
2. File System Compatibility: The DS-4212 UHD NAS devices support different file systems such as EXT4, NTFS, and exFAT. While most operating systems can read and write to these file systems, there might be limitations or compatibility issues with certain file system features. For example, some advanced file system features may not be fully supported by older operating systems or platforms.
3. User Authentication and Access Control: The DS-4212 UHD NAS devices provide various user authentication and access control mechanisms, including local user accounts, LDAP, and Active Directory integration. While these mechanisms are generally compatible with different operating systems and platforms, there might be some configuration differences or limitations based on the specific authentication protocols and settings supported by the operating system or platform.
4. Software and Firmware Updates: To ensure compatibility and optimal performance, it is important to keep the NAS device's software and firmware up to date. Digiever regularly releases updates and patches to address compatibility issues and improve functionality. It is recommended to check for and apply these updates periodically.

In summary, while the Digiever DS-4212 UHD NAS devices are compatible with various operating systems and platforms, it is crucial to consider the specific requirements, network protocols, file systems, and authentication mechanisms to ensure seamless integration and functionality. Consulting the device's documentation or contacting Digiever support can provide more specific information based on your setup.

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

Although the NAS DS-4212 UHD 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 Digiever DS-4212 UHD. 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 Digiever

DS-4212 UHD has 4 HDD slots, and it supports the following array types:

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

NAS supports:

• exFAT, VFAT, FAT 12 / 16 / 32;
• NTFS / ReFS;
• APFS / HFS+;
• Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
• VMFS / HikvisionFS;

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 Digiever DS-4212 UHD 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