Home NAS QNAP TVS-473e Data Recovery: Features and Best Practices

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS QNAP TVS-473e
• How to Remove Hard Disks from Your NAS and Connect Them to a PC
  • Step-by-Step Data Recovery with Hetman RAID Recovery
  • How to Safely Recover Data from Disk Images
  • Where Are the User’s Files Actually Stored?
  • RAID Recovery Software: Detailed Comparison

Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like QNAP often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

How can a NAS QNAP TVS-473e device's network throughput or bandwidth capacity affect data transfer and potential loss?

The network throughput or bandwidth capacity of a QNAP TVS-473e NAS device can have a significant impact on data transfer and potential loss. Here are a few ways it can affect these aspects:

1. Data Transfer Speed: The network throughput determines how quickly data can be transferred between the NAS device and other devices on the network. A higher network throughput means faster data transfer speeds, allowing for quicker backups, file transfers, and multimedia streaming. Conversely, a lower network throughput can result in slower data transfer speeds, leading to delays and longer wait times.
2. Concurrent Connections: The network throughput also affects the number of concurrent connections the NAS device can handle. If the network throughput is limited, the device may struggle to handle multiple simultaneous connections, resulting in slower transfer speeds and potential data loss due to timeouts or dropped connections.
3. Data Loss and Packet Drops: Insufficient network throughput can lead to packet drops, where data packets are lost or discarded during transmission. This can result in incomplete or corrupted files, leading to potential data loss. Additionally, if the network is congested due to limited throughput, data transfer performance may degrade, increasing the likelihood of data loss or errors during transmission.
4. Network Bottlenecks: If the network throughput of the NAS device is higher than the available bandwidth of the network infrastructure it is connected to, it can create a bottleneck. In such cases, the NAS device's high throughput capabilities may not be fully utilized, resulting in slower data transfer speeds and potential data loss.

To mitigate these issues, it is important to ensure that the network infrastructure, including routers, switches, and cables, can support the maximum network throughput of the QNAP TVS-473e NAS device. Additionally, optimizing network settings, such as using link aggregation or upgrading to faster networking technologies (e.g., 10GbE), can help maximize data transfer speeds and minimize potential data loss.

How to Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS TVS-473e can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

1. Power off the NAS and disconnect it from the power source.

   WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.

2. Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.

3. Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.

4. Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

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   How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with QNAP TVS-473e. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

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How to recover data from a QNAP

TVS-473e has 4 HDD slots, and it supports the following array types:

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

NAS supports:

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

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

• Overwriting during the recovery process;
• Additional data loss caused by bad sectors;
• User errors.

To create a disk image, follow these steps:

1. Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.

2. In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.

3. When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.

   

4. Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

   

Where Are the User’s Files Actually Stored?

The QNAP TVS-473e 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.

RAID Recovery Software: Detailed Comparison