
- Why Regular Data Recovery Tools Can’t Restore Files from RAID
- Key Information About the NAS Digiever IDS-T4000
- How to Remove Hard Disks from Your NAS and Connect Them to a PC
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.
Can remote access to NAS Digiever IDS-T4000 devices pose additional data loss risks?
Remote access to NAS Digiever IDS-T4000 devices can potentially pose additional data loss risks if proper security measures are not in place. Here are a few factors to consider:
- Unauthorized Access: If remote access is not properly secured, it can expose the NAS device to unauthorized access by malicious individuals. This can lead to data breaches, data theft, or unauthorized modifications to data.
- Weak Authentication: Weak or easily guessable passwords can make it easier for attackers to gain unauthorized access. It is important to use strong passwords and enable multi-factor authentication to mitigate this risk.
- Network Vulnerabilities: If the network used for remote access is not secure, it can expose the NAS device to various network-based attacks, such as man-in-the-middle attacks or network sniffing. These attacks can potentially lead to data loss or unauthorized access.
- Software Vulnerabilities: NAS devices, like any other software, can have vulnerabilities that can be exploited by attackers. It is crucial to keep the NAS firmware and software up to date with the latest security patches to minimize the risk of data loss.
- User Error: Remote access increases the likelihood of user error, such as accidental deletion or modification of important data. It is important to have proper backup mechanisms in place to recover from such incidents.
To mitigate these risks, it is recommended to follow best practices such as enabling strong authentication mechanisms, using secure network connections (e.g., VPN), regularly updating firmware and software, implementing access controls, and regularly backing up data to separate storage devices or locations.
How to Remove Hard Disks from Your NAS and Connect Them to a PC
Although the NAS IDS-T4000 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:
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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.
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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.
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Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.
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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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Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with Digiever IDS-T4000. 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.
How to recover data from a Digiever
IDS-T4000 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:
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Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.
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In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.
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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.

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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 IDS-T4000 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 |


It is possible to recover data from a NAS Digiever IDS-T4000 device that has been affected by a power supply or voltage fluctuation issue, but it depends on the extent of the damage.
In some cases, the data may still be intact and can be recovered by connecting the device to a stable power source and accessing the data through the appropriate software or interface. However, if the power supply or voltage fluctuation has caused physical damage to the device or its storage media, data recovery may be more challenging and may require professional assistance from a data recovery service.
It is important to note that attempting to recover data from a damaged device can potentially cause further damage or data loss. Therefore, it is recommended to consult with a professional data recovery service to assess the situation and determine the best course of action.