How to Recover Data from a Damaged RAID Array on NAS Idis DR-6308P

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS Idis DR-6308P
• 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 Idis 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 the NAS Idis DR-6308P device's CPU or processing power affect data transfer and potential loss?

The CPU or processing power of the NAS Idis DR-6308P device can have a significant impact on data transfer and potential loss in several ways:

1. Data transfer speed: The CPU's processing power determines the device's ability to handle data transfer requests efficiently. A more powerful CPU can handle larger amounts of data and process them quickly, resulting in faster data transfer speeds. Conversely, a slower CPU may struggle to keep up with high data transfer demands, leading to slower transfer speeds.
2. Network bandwidth utilization: The CPU plays a crucial role in managing network traffic and allocating resources effectively. A powerful CPU can efficiently handle multiple data transfer requests simultaneously, optimizing network bandwidth utilization. This ensures that data transfers occur smoothly without bottlenecks. In contrast, a weak CPU may struggle to manage network traffic, leading to congestion and potential data loss.
3. Data integrity and error correction: During data transfer, the CPU performs various tasks, including error detection and correction. A robust CPU can quickly identify and rectify errors, ensuring data integrity throughout the transfer process. If the CPU lacks processing power, it may not be able to handle error correction efficiently, leading to potential data loss or corruption.
4. RAID performance: The NAS Idis DR-6308P device supports RAID configurations for data redundancy and protection. The CPU's processing power affects the performance of RAID operations, such as data mirroring or parity calculations. A powerful CPU can handle these operations quickly, minimizing the time required for data synchronization and reducing the risk of data loss. A weaker CPU may result in slower RAID performance, increasing the vulnerability to data loss during the synchronization process.

Overall, the CPU or processing power of the NAS Idis DR-6308P device is crucial for ensuring efficient data transfer, maintaining data integrity, and minimizing the risk of potential data loss.

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

Although the NAS DR-6308P 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 Idis DR-6308P. 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 Idis

DR-6308P has 6 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 Idis DR-6308P 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