Recovering Data After RAID Array Format on NAS QNAP Turbo Station TS-877XU-RP: Step-by-Step Guide

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS QNAP Turbo Station TS-877XU-RP
• 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 storage tiering or caching strategies impact data availability and potential loss on NAS QNAP Turbo Station TS-877XU-RP devices?

Storage tiering and caching strategies can have a significant impact on data availability and potential loss on NAS QNAP Turbo Station TS-877XU-RP devices. Here are a few ways in which these strategies can affect data availability and potential loss:

1. Improved Performance: By implementing storage tiering and caching strategies, you can enhance the overall performance of your NAS device. Caching involves storing frequently accessed data in a faster storage medium (such as SSDs) to reduce access latency. This can result in faster data retrieval and improved availability.
2. Redundancy and Data Protection: Storage tiering can be used to create redundant copies of data across different storage tiers, including both high-performance and high-capacity storage. This redundancy helps ensure data availability in case of hardware failures or disk errors. By spreading data across multiple tiers, the risk of potential data loss is reduced.
3. Data Migration and Movement: Storage tiering allows you to move data between different tiers based on its usage patterns and importance. This movement can be automated or manual, depending on the NAS device's capabilities. By migrating data to appropriate storage tiers, you can optimize storage resources and improve data availability by ensuring that frequently accessed data is stored on faster storage media.
4. Impact on Data Loss: While storage tiering and caching strategies can enhance data availability, there is a potential risk of data loss if not implemented properly. It is crucial to have a robust backup and disaster recovery strategy in place to protect against data loss due to hardware failures, accidental deletions, or other unforeseen events. Regular backups and redundancy across multiple storage tiers can help mitigate the risk of data loss.
5. Consideration of Workload and Data Patterns: When implementing storage tiering and caching strategies, it is essential to consider the workload and data access patterns of your NAS device. Different workloads may require different caching and tiering configurations. Analyzing data access patterns and workload requirements can help optimize data availability while minimizing the risk of potential loss.

Overall, storage tiering and caching strategies can significantly impact data availability and potential loss on NAS QNAP Turbo Station TS-877XU-RP devices. Proper implementation, considering workload requirements, redundancy, and backup strategies, is crucial to ensure data availability and minimize the risk of data loss.

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

Although the NAS Turbo Station TS-877XU-RP 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-877XU-RP. 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-877XU-RP 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-877XU-RP 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