NAS Digiever MN-1120 Pro+ RAID Array Recovery: Dealing with Faulty Arrays

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

How can the use of specific file-sharing protocols impact data loss risks on NAS Digiever MN-1120 Pro+ devices?

The use of specific file-sharing protocols can impact data loss risks on NAS Digiever MN-1120 Pro+ devices in several ways:

1. Encryption: Some file-sharing protocols offer built-in encryption mechanisms to secure data during transmission. Using protocols with strong encryption can significantly reduce the risk of data loss due to unauthorized access or interception.
2. Authentication: Certain protocols provide robust authentication mechanisms, such as username/password or digital certificates, to ensure that only authorized users can access the shared files. Strong authentication can prevent unauthorized users from gaining access to sensitive data and reduce the risk of data loss.
3. Access Controls: File-sharing protocols may offer granular access control mechanisms, allowing administrators to define permissions and restrictions for different users or user groups. By using protocols that support fine-grained access controls, organizations can minimize the risk of accidental or intentional data loss by limiting access to sensitive information.
4. Error Handling: Different protocols handle errors and network interruptions differently. Some protocols may have built-in error detection and correction mechanisms, ensuring data integrity during transmission. Choosing protocols with robust error handling capabilities can reduce the risk of data loss due to network issues.
5. Compatibility: The choice of file-sharing protocol should also consider compatibility with different operating systems and devices. Using protocols that are widely supported across various platforms can help prevent data loss caused by compatibility issues or data corruption during file transfers.
6. Vulnerabilities: It's important to consider the security vulnerabilities associated with specific file-sharing protocols. Some protocols may have known vulnerabilities that can be exploited by attackers to gain unauthorized access or cause data loss. Staying informed about the latest security updates and patches for the chosen protocols can mitigate these risks.

Overall, selecting file-sharing protocols that prioritize encryption, authentication, access controls, error handling, compatibility, and security can significantly reduce the risk of data loss on NAS Digiever MN-1120 Pro+ devices.

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

Although NAS MN-1120 Pro+ 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 Digiever MN-1120 Pro+. 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 Digiever

MN-1120 Pro+ has 1 HDD slots, and it supports the following array types:

• None;

NAS supports:

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

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 Digiever MN-1120 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.

Comparison of software for RAID recovery