RAID Array Recovery Tips for NAS Digiever DS-16325-RM Pro+ Users

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS Digiever DS-16325-RM Pro+
• 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.

How can regular vulnerability assessments and security audits help identify and mitigate potential data loss risks for NAS Digiever DS-16325-RM Pro+ devices?

Regular vulnerability assessments and security audits can help identify and mitigate potential data loss risks for NAS Digiever DS-16325-RM Pro+ devices in the following ways:

1. Identify vulnerabilities: Vulnerability assessments can help identify any weaknesses or vulnerabilities in the NAS device's firmware, operating system, or applications. This includes identifying outdated software versions, misconfigurations, or insecure default settings that could potentially lead to data loss.
2. Patch management: Regular security audits can ensure that the NAS device's firmware and software are up to date with the latest security patches. This helps protect against known vulnerabilities that could be exploited by attackers to gain unauthorized access to the device or compromise data.
3. Access controls: Assessments and audits can review the access controls and user permissions configured on the NAS device. This helps ensure that only authorized individuals have access to sensitive data and that proper authentication mechanisms are in place to prevent unauthorized access.
4. Encryption and data protection: Assessments can verify if the NAS device supports encryption for data at rest and data in transit. Audits can ensure that encryption is properly implemented and configured to protect sensitive data from unauthorized access or interception.
5. Backup and disaster recovery: Assessments can evaluate the backup and disaster recovery mechanisms in place for the NAS device. This includes checking if regular backups are performed, testing the restoration process, and verifying the availability of redundant storage or off-site backups. These measures can help mitigate the risk of data loss in case of hardware failures, accidents, or cyberattacks.
6. Network security: Assessments can review the network configuration of the NAS device, including firewall rules, network segmentation, and intrusion detection systems. Audits can help ensure that the device is isolated from potentially insecure or unauthorized networks, reducing the risk of unauthorized access and data loss.
7. User awareness and training: Assessments and audits can also evaluate the level of user awareness and training regarding data security best practices. This includes educating users on how to properly handle and store sensitive data, recognizing phishing attempts, and understanding the importance of strong passwords.

By conducting regular vulnerability assessments and security audits, organizations can proactively identify and address potential data loss risks for NAS Digiever DS-16325-RM Pro+ devices, thereby enhancing the overall security posture and protecting valuable data.

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

Although the NAS DS-16325-RM Pro+ 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-16325-RM Pro+. 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-16325-RM Pro+ has 16 HDD slots, and it supports the following array types:

• RAID 0;
• RAID 1;
• RAID 5;
• RAID 6;
• RAID 50;
• RAID 60;
• 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-16325-RM Pro+ 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