Recovering Data from NAS QNAP Turbo Station TS-409 / TS-409 Pro / TS-409U RAID Controller Failure: Causes and Consequences

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 QNAP 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 specific precautions to take while migrating data between NAS QNAP Turbo Station TS-409 / TS-409 Pro / TS-409U devices?

Yes, there are some precautions you should take when migrating data between NAS QNAP Turbo Station TS-409 / TS-409 Pro / TS-409U devices. Here are some recommendations:

1. Backup your data: Before starting the migration process, it is crucial to create a backup of all your important data. This will ensure that you have a copy of your files in case anything goes wrong during the migration.
2. Check compatibility: Ensure that the target device (the new NAS) is compatible with the source device (the old NAS). Check the specifications and supported models to confirm compatibility.
3. Update firmware: Make sure that both the source and target devices are running the latest firmware versions. Updating the firmware can help avoid any compatibility issues and ensure a smooth migration process.
4. Plan the migration: Plan the migration process carefully, considering factors like the amount of data, available storage space, and network bandwidth. It is recommended to perform the migration during a low-usage period to minimize disruptions.
5. Transfer method: Decide on the method you will use to transfer the data. QNAP provides various methods such as using the QNAP NAS data migration tool, network transfer, or external USB/eSATA devices. Choose the method that suits your requirements and follow the recommended steps provided by QNAP.
6. Verify data integrity: After the migration is complete, verify the integrity of the transferred data. Check if all files and folders are intact and accessible on the new NAS. Compare checksums or perform sample checks to ensure data integrity.
7. Test functionality: Test the functionality of the new NAS after the migration. Ensure that all services, applications, and features are working as expected. This will help identify any issues or configuration changes that need to be addressed.

By following these precautions, you can minimize the risk of data loss or errors during the migration process and ensure a successful transition to the new NAS device.

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

Although NAS Turbo Station TS-409 / TS-409 Pro / TS-409U 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 QNAP Turbo Station TS-409 / TS-409 Pro / TS-409U. 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 QNAP

Turbo Station TS-409 / TS-409 Pro / TS-409U has 4 HDD slots, and it supports the following array types:

• RAID 5;
• RAID 6;
• RAID 10;
• RAID 0;
• RAID 1;
• JBOD;

NAS supports:

• ZFS;
• EXT4;
• EXT3;
• FAT32 (External Disk Only);
• NTFS (External Disk Only);
• HFS+ (External Disk Read Only);

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 QNAP Turbo Station TS-409 / TS-409 Pro / TS-409U network-attached storage keeps QTS (QuTS hero) 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