How to Retrieve Data from RAID If NAS Buffalo TeraStation TS-QVH4.0TL/R6 Is Unresponsive

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 Buffalo 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 regular testing and validation of data backups to prevent potential loss on NAS Buffalo TeraStation TS-QVH4.0TL/R6 devices?

Yes, there are several recommended practices for regular testing and validation of data backups on NAS Buffalo TeraStation TS-QVH4.0TL/R6 devices to prevent potential loss. Here are some of them:

1. Regularly schedule backups: Set up a regular backup schedule to ensure that your data is backed up consistently. This can be done daily, weekly, or monthly, depending on your requirements.
2. Use multiple backup destinations: It is recommended to have multiple backup destinations, such as external hard drives, cloud storage, or another NAS device. This provides an additional layer of protection in case one backup destination fails.
3. Verify backup integrity: After each backup, verify the integrity of the backup files. Many backup software solutions offer built-in integrity checks, which can ensure that the backup is complete and error-free.
4. Perform test restores: Regularly test the restore process by restoring a subset of your data from the backup. This will help ensure that the backup files are valid and can be successfully restored when needed.
5. Monitor backup status: Monitor the backup status and logs to ensure that backups are completing successfully without any errors or warnings. This will help identify any issues early on and take appropriate action.
6. Regularly update firmware and software: Keep your NAS device's firmware and backup software up to date. This ensures that you have the latest bug fixes and security patches, reducing the chances of data loss.
7. Implement RAID for data redundancy: The Buffalo TeraStation TS-QVH4.0TL/R6 supports RAID configurations. Implementing RAID (such as RAID 1 or RAID 5) provides data redundancy, which can help protect against data loss in case of a drive failure.
8. Regularly test and replace drives: Monitor the health of your hard drives and replace any failing drives promptly. Regularly testing and replacing drives helps prevent data loss due to drive failures.
9. Off-site backups: Consider keeping a copy of your backups off-site, in a different physical location. This protects your data in case of a disaster or physical damage to your primary backup location.

By following these recommended practices, you can significantly reduce the risk of potential data loss on your NAS Buffalo TeraStation TS-QVH4.0TL/R6 devices.

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

Although NAS TeraStation TS-QVH4.0TL/R6 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 Buffalo TeraStation TS-QVH4.0TL/R6. 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 Buffalo

TeraStation TS-QVH4.0TL/R6 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;

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 Buffalo TeraStation TS-QVH4.0TL/R6 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