Data Recovery After RAID Array Format on NAS QNAP Turbo Station TS-EC880 Pro / TS-EC880U: Essential Tips

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS QNAP Turbo Station TS-EC880 Pro / TS-EC880U
• 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 the number of drives in a NAS QNAP Turbo Station TS-EC880 Pro / TS-EC880U device's RAID array impact data recovery and potential loss?

The number of drives in a NAS QNAP Turbo Station TS-EC880 Pro / TS-EC880U device's RAID array can significantly impact data recovery and potential loss. Here are a few factors to consider:

1. RAID Level: The RAID level chosen for the array determines the level of data redundancy and performance. Common RAID levels include RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. Each RAID level has different capabilities in terms of data protection and recovery.
2. Data Redundancy: RAID arrays with higher levels of data redundancy (such as RAID 5 and RAID 6) can withstand the failure of one or more drives without losing data. This means that even if a drive fails, the data can be rebuilt from the remaining drives in the array. However, if multiple drives fail simultaneously, the chances of data loss increase.
3. Rebuilding Time: When a drive fails in a RAID array, the system needs to rebuild the data onto a new drive. The time it takes to rebuild the data depends on the number and size of the drives in the array. With larger arrays, the rebuilding process can take longer, increasing the vulnerability to potential data loss during the rebuild.
4. URE (Unrecoverable Read Error) Risk: During the rebuilding process, the remaining drives in the RAID array are heavily stressed. In larger arrays, the likelihood of encountering an Unrecoverable Read Error (URE) increases. If a URE occurs during the rebuild, it can lead to data loss as the system may not be able to reconstruct the data correctly.
5. Backup Strategy: Regardless of the RAID level and the number of drives, having a reliable backup strategy is crucial. RAID arrays are not foolproof, and they cannot protect against all types of data loss scenarios, such as accidental deletion, file corruption, or catastrophic events like fires or floods. Regular backups to an external storage or cloud service can provide an additional layer of protection.

In summary, while increasing the number of drives in a NAS QNAP Turbo Station TS-EC880 Pro / TS-EC880U device's RAID array can enhance data redundancy and performance, it also introduces certain risks. It is essential to choose an appropriate RAID level, regularly monitor the health of the drives, and maintain a robust backup strategy to minimize the potential for data loss and facilitate data recovery if needed.

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

Although the NAS Turbo Station TS-EC880 Pro / TS-EC880U 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 Turbo Station TS-EC880 Pro / TS-EC880U. 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

Turbo Station TS-EC880 Pro / TS-EC880U has 8 HDD slots, and it supports the following array types:

• RAID 50;
• RAID 60;
• RAID 5;
• RAID 6;
• 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 Turbo Station TS-EC880 Pro / TS-EC880U 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