- Why Regular Data Recovery Tools Can’t Restore Files from RAID
- Key Information About the NAS Huawei OceanStor Dorado 18000 V6
- 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.
Can the use of multiple NAS Huawei OceanStor Dorado 18000 V6 devices in a backup or replication configuration mitigate data loss risks?
Yes, the use of multiple NAS Huawei OceanStor Dorado 18000 V6 devices in a backup or replication configuration can help mitigate data loss risks.
By implementing a backup or replication configuration, data can be duplicated or copied across multiple devices, ensuring that there are multiple copies of the data available. This redundancy helps protect against data loss in case of hardware failures, natural disasters, or other unforeseen events.
In the event of a failure or data loss on one device, the replicated data on the other devices can be used to restore the lost data, minimizing the impact on business operations and reducing the risk of data loss.
Furthermore, the use of multiple devices allows for load balancing and improved performance. Data can be distributed across multiple devices, reducing the load on each device and improving overall system performance.
Overall, implementing a backup or replication configuration with multiple NAS Huawei OceanStor Dorado 18000 V6 devices provides data redundancy, improved data availability, and enhanced system performance, thereby mitigating data loss risks.
How to Remove Hard Disks from Your NAS and Connect Them to a PC
Although the NAS OceanStor Dorado 18000 V6 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 Dorado 18000 V6. 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 Dorado 18000 V6 has 32 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 Dorado 18000 V6 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 |
Yes, data recovery from a NAS Huawei OceanStor Dorado 18000 V6 device can still be possible even if the device is experiencing intermittent connectivity issues. However, the success of the recovery process may depend on the extent of the connectivity issues and the specific cause of the problem.
If the intermittent connectivity issues are due to network or connectivity problems, it may be possible to resolve the issues and recover the data by troubleshooting the network or fixing any hardware or software problems causing the connectivity issues.
However, if the connectivity issues are caused by a hardware failure or a more severe problem with the NAS device, it may be necessary to seek professional assistance from data recovery experts. They have specialized tools and expertise to recover data from faulty devices and can often recover data even in challenging situations.
It is important to note that in any data recovery scenario, it is recommended to immediately stop using the faulty device and seek professional help to avoid any further damage or data loss.