Expert RAID Array Tips for NAS Digiever DS-8349-SRM Pro+ Data Restoration

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.

Are there any recommended best practices for securely storing usernames and passwords on NAS Digiever DS-8349-SRM Pro+ devices?

Yes, there are several recommended best practices for securely storing usernames and passwords on NAS Digiever DS-8349-SRM Pro+ devices. Here are some key recommendations:

1. Use strong and unique passwords: Ensure that each user account on the device has a strong and unique password. Avoid using common or easily guessable passwords.
2. Enable two-factor authentication (2FA): Enable 2FA for all user accounts if the device supports it. This adds an extra layer of security by requiring users to provide a second form of authentication, such as a code from a mobile app or a physical token.
3. Regularly update firmware: Keep the device's firmware up to date with the latest security patches and updates. This helps protect against known vulnerabilities and exploits.
4. Limit access privileges: Only grant necessary access privileges to each user account. Avoid giving unnecessary administrative privileges to regular users.
5. Implement network segmentation: Consider segregating the NAS device from other network resources by implementing network segmentation. This helps prevent unauthorized access to the device from other parts of the network.
6. Disable unnecessary services: Disable any unnecessary services or features on the device to reduce the attack surface. Only enable the services that are required for the device's intended use.
7. Regularly backup data: Implement a regular backup strategy to ensure that critical data stored on the NAS device is not lost in case of hardware failure or ransomware attacks.
8. Use secure protocols: Whenever possible, use secure protocols such as HTTPS or SFTP for remote access to the NAS device. Avoid using insecure protocols like plain HTTP or FTP.
9. Monitor and log activity: Enable logging and monitoring features on the device to track and identify any suspicious or unauthorized activity. Regularly review the logs for any signs of potential security breaches.
10. Educate users: Provide training and education to users on best practices for password security, phishing awareness, and general cybersecurity hygiene. This helps reduce the risk of social engineering attacks and user-related security incidents.

It is important to note that these recommendations are general best practices for securing NAS devices and may not be specific to the Digiever DS-8349-SRM Pro+ model. Always refer to the manufacturer's documentation and guidelines for device-specific security recommendations.

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

Although NAS DS-8349-SRM 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 DS-8349-SRM 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

DS-8349-SRM Pro+ has 8 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;

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 DS-8349-SRM 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