- Why can’t ordinary software tools restore files from RAID?
- How to take hard disks out of the NAS and connect them to a PC?
Why can’t ordinary software tools restore files from RAID?
Conventional hard disks keep user’s data by writing it to their surface in a consecutive way, and this is how an entire file is stored on a single hard disk. However, when data is written to a RAID system, a file is divided into several parts. Then these parts are written consecutively to all hard disks within such array. The size of such parts may range from 2 KB to 2 MB, so each file is stored on several hard disks at the same time.
Such approach helps to speed up read and write operations, and it is evident that saving two parts of a file having the size of 1 GB to two hard disks simultaneously is much faster than saving the same 1 GB of data to one hard disk. However, this peculiarity makes file recovery more complicated.
Various RAID levels store information in different ways. Additionally, manufacturers like QNAP also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.
How can the number of drives in a NAS QNAP Turbo Station TS-883XU-RP device's RAID array impact data recovery and potential loss?
The number of drives in a NAS QNAP Turbo Station TS-883XU-RP device's RAID array can significantly impact data recovery and potential loss. Here are a few key points to consider:
- RAID Level: The RAID level used in the array determines the level of data redundancy and fault tolerance. Common RAID levels include RAID 0, RAID 1, RAID 5, RAID 6, and RAID 10. Each level has different characteristics in terms of data protection and recovery.
- Data Redundancy: The more drives in the RAID array, the higher the level of data redundancy. RAID levels like RAID 1, RAID 5, RAID 6, and RAID 10 provide varying degrees of redundancy, allowing for data recovery in case of drive failures.
- Drive Failure: With more drives in the array, the chances of drive failure increase. If a drive fails in a RAID array, the data can be reconstructed using the redundancy information stored on other drives. However, if multiple drives fail simultaneously or within a short period, the chances of data loss increase.
- Rebuilding Time: When a drive fails, the RAID array needs to rebuild the data onto a replacement drive. The larger the number of drives in the array, the longer it takes to rebuild, leaving the system vulnerable to additional drive failures during the rebuild process.
- RAID Rebuild Failure: In cases where multiple drives fail or there are errors during the RAID rebuild process, the data recovery becomes more complex and may require professional assistance. The more drives in the array, the higher the complexity and cost of data recovery.
- Backup Strategy: Regardless of the number of drives in the RAID array, having a robust backup strategy is crucial to mitigate the risk of data loss. Regular backups to external devices, cloud storage, or off-site locations ensure that data can be recovered even in the worst-case scenarios.
In summary, while a larger number of drives in a NAS QNAP Turbo Station TS-883XU-RP device's RAID array can provide higher levels of data redundancy, it also increases the complexity and potential risks associated with data recovery. It is essential to choose the appropriate RAID level, regularly monitor drive health, and have a reliable backup strategy in place to minimize the impact of drive failures and potential data loss.
How to take hard disks out of the NAS and connect them to a PC?
Although NAS Turbo Station TS-883XU-RP can be accessed over the network, you still need to take the hard disks out of the storage device and connect them to a Windows computer. Only in this case will the software be able to scan them properly. Here is what you should do:
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Turn off the storage and disconnect it from the power supply.
WARNING! Before you start taking hard disks out of your NAS device, read the manual carefully. Incorrect actions may damage your network-attached storage and/or the hard disks within the RAID system.
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Take the hard disks out of the NAS one by one, carefully removing them from their slots. Remember that the disks are extremely vulnerable: hitting or dropping them may result in serious physical damage.
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Make sure to mark each hard disk in accordance with how they were installed inside the NAS.
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Remove the hard disks and connect them to the computer. In this video, we have explored what ports are used to connect hard disks, and what to do if there are not enough ports or connectors.
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Restoring data with Hetman RAID Recovery
This program recovers data from damaged RAID arrays and is fully compatible with QNAP Turbo Station TS-883XU-RP. The hard disks that make up the RAID contain technical information about the algorithm used to save files. When launched, Hetman RAID Recovery reads this information and puts the damaged array together. Then you can open the disk and save your files. Also, you can recover the files accidentally deleted from the network drive.
How to recover data from a QNAP
Turbo Station TS-883XU-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);
Safe recovery from disk images
This utility lets you save an entire copy of the disk to file and then work with this image instead of the actual disk. Such feature helps to protect data on the disk from:
- Overwriting during the recovery process;
- Loss resulting from bad sectors;
- User mistakes.
To create an image, do the following:
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Make sure that you have enough free space to save the image. The image file size usually equals the disk size.
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Select the disk in the main window, and choose from the menu Tools – Save Disk. You can select multiple disks to be saved.
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When the image creation wizard starts, you can choose to save the entire disk or select only a part of it. Specify the parameters and click Next.
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At this stage, you need to choose a directory where to save the image. Choose any disk connected to this PC, or save the image by FTP.
Where are user’s files stored?
The QNAP Turbo Station TS-883XU-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.
Comparison of software for RAID recovery
| Product | Operating system | License type | RAID controller support | Supported file systems | Virtual RAID controller support | Data recovery from damaged RAID | File preview |
|---|---|---|---|---|---|---|---|
| Hetman RAID Recovery | Windows | Paid | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
| DiskInternals RAID Recovery | Windows | Paid | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | No | Yes | Yes |
| R-Studio | Windows, Mac, Linux | Paid | Yes, over 200 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
| UFS Explorer RAID Recovery | Windows, Mac, Linux | Paid | Yes, over 1,000 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
| EaseUS Data Recovery | Windows | Paid | Yes, over 20 controllers | FAT, NTFS, Ext2/3/4, HFS+ | No | Yes | Yes |
| ReclaiMe Free RAID Recovery | Windows | Free | Yes, over 100 controllers | FAT, NTFS, Ext2/3/4, HFS+ | Yes | Yes | Yes |
