- Why Regular Data Recovery Tools Can’t Restore Files from RAID
- Key Information About the NAS Huawei OceanStor 2200 V3
- How to Remove Hard Disks from Your NAS and Connect Them to a PC
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 Huawei 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 file system corruption impact data integrity on NAS Huawei OceanStor 2200 V3 devices?
File system corruption on NAS Huawei OceanStor 2200 V3 devices can have a significant impact on data integrity. Here are a few ways it can affect the device:
- Data Loss: File system corruption can lead to the loss of data stored on the NAS device. It can make files and directories inaccessible or completely disappear from the file system.
- Data Inconsistency: Corruption can result in inconsistencies within the file system, causing data to become incorrect or invalid. This can lead to data errors, such as incorrect values or missing information within files.
- Data Access Issues: Corrupted file systems may cause difficulties in accessing data stored on the NAS device. Users may experience slow read/write speeds, frequent crashes, or even complete system unresponsiveness.
- Data Recovery Challenges: Recovering data from a corrupted file system can be challenging and may require specialized tools or professional assistance. In some cases, data recovery may not be possible at all, resulting in permanent data loss.
- System Instability: File system corruption can destabilize the overall functioning of the NAS device. It may lead to system crashes, unexpected reboots, or other performance issues, impacting the reliability and availability of stored data.
To mitigate these risks and ensure data integrity, it's essential to regularly back up data on the NAS device, implement proper data protection mechanisms such as RAID, and regularly monitor the health of the file system to detect and repair any corruption issues promptly.
How to Remove Hard Disks from Your NAS and Connect Them to a PC
Although the NAS OceanStor 2200 V3 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:
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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.
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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.
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Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.
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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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Step-by-Step Data Recovery with Hetman RAID Recovery
This program restores data from damaged RAID arrays and is fully compatible with Huawei OceanStor 2200 V3. 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.
How to recover data from a Huawei
OceanStor 2200 V3 has 300 HDD slots, and it supports the following array types:
- RAID 0;
- RAID 1;
- RAID 5;
- RAID 6;
- RAID 50;
- RAID 60;
- JBOD;
NAS supports:
- exFAT, VFAT, FAT 12 / 16 / 32;
- NTFS / ReFS;
- APFS / HFS+;
- Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
- VMFS / HikvisionFS;
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:
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Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.
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In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.
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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.
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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 Huawei OceanStor 2200 V3 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.
RAID Recovery Software: Detailed Comparison
| Product | Operating system | RAID controller support | Supported file systems | Virtual RAID controller support | Data recovery from damaged RAID | File preview |
|---|---|---|---|---|---|---|
| Hetman RAID Recovery | Windows, Linux, MacOS | Yes, over 100 controllers | FAT, exFAT, NTFS, ReFS, APFS, HFS+, Ext4, Ext3, Ext2, ReiserFS, Btrfs, VMFS, Hikvision, XFS, UFS, ZFS | Yes | Yes | Yes |
| DiskInternals RAID Recovery | Windows | Yes, over 10 controllers | FAT, NTFS, Ext2/3/4, HFS+ | No | Yes | Yes |
| R-Studio | Windows, Mac, Linux | Yes, over 20 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
| UFS Explorer RAID Recovery | Windows, Mac, Linux | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
| EaseUS Data Recovery | Windows | Yes, over 20 controllers | FAT, NTFS, Ext2/3/4, HFS+ | No | Yes | Yes |
| ReclaiMe Free RAID Recovery | Windows | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
Data recovery from a NAS (Network Attached Storage) device like the Huawei OceanStor 2200 V3 can be challenging if the storage disks have been overwritten or reformatted. When data is overwritten or reformatted, the original data is typically erased or replaced, making it difficult to recover.
However, data recovery may still be possible in certain cases. It depends on several factors, such as the extent of the overwriting or reformatting, the specific file system used on the NAS, and the actions taken after the data loss.
If the data has been recently overwritten or reformatted, it may be worth contacting a professional data recovery service as soon as possible. They may have specialized tools and techniques to attempt recovery, although success cannot be guaranteed.
It is important to note that attempting data recovery on your own or using unreliable software can potentially worsen the situation and make recovery more difficult or even impossible.