Effective Methods to Recover Faulty RAID Arrays in NAS Idis DR-6216P-S

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 Idis 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 practices for protecting NAS Idis DR-6216P-S devices against physical theft or unauthorized access that can lead to data loss?

Yes, there are several recommended practices for protecting NAS Idis DR-6216P-S devices against physical theft or unauthorized access:

1. Physical Security: Keep the device in a secure location, such as a locked server room or cabinet, to prevent physical theft. Limit access to authorized personnel only.
2. Strong Passwords: Change the default password of the device and set a strong password that includes a combination of letters, numbers, and special characters. Avoid using easily guessable passwords.
3. User Access Control: Create individual user accounts with specific access rights and privileges. Only provide access to necessary users and restrict access to sensitive data.
4. Two-Factor Authentication (2FA): Enable 2FA if supported by the device. This adds an extra layer of security by requiring users to provide a second form of authentication, such as a code generated on a mobile device, in addition to the password.
5. Firmware Updates: Regularly update the firmware of the NAS device to ensure it has the latest security patches and bug fixes. Check the manufacturer's website for firmware updates and follow the recommended update process.
6. Network Segmentation: Separate the NAS device from other network resources by using VLANs or network segmentation. This helps prevent unauthorized access to the device from other parts of the network.
7. Firewall Configuration: Configure the device's built-in firewall to restrict access to only necessary services and ports. Block all unnecessary incoming connections.
8. Encryption: Enable data encryption on the NAS device to protect the stored data. This ensures that even if the physical device is stolen, the data remains encrypted and inaccessible without the encryption key.
9. Regular Backups: Implement a regular backup strategy to ensure that important data is backed up and can be restored in case of data loss or device theft.
10. Monitoring and Auditing: Set up monitoring and auditing systems to track and log any unauthorized access attempts or suspicious activities. Regularly review the logs for any potential security breaches.

It is important to note that these practices are general recommendations and may vary based on specific requirements and the manufacturer's guidelines. Always refer to the manufacturer's documentation and consult with security professionals for the best practices specific to your environment.

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

Although NAS DR-6216P-S 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 Idis DR-6216P-S. 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 Idis

DR-6216P-S 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;

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 Idis DR-6216P-S 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