- 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 storage tiering or caching strategies impact data availability and potential loss on NAS QNAP TVS-EC1080 devices?
Storage tiering and caching strategies can greatly impact data availability and potential loss on NAS QNAP TVS-EC1080 devices. Here's how:
- Improved Performance: By implementing storage tiering and caching strategies, you can enhance the overall performance of your NAS device. Caching allows frequently accessed data to be stored in faster storage media such as SSDs, reducing the latency and improving read/write speeds. This ensures faster access to critical data, enhancing data availability.
- Data Redundancy: Storage tiering can also be used to create redundant copies of data across different tiers. For example, you can configure a tier with high-performance SSDs for frequently accessed data and another tier with slower but more cost-effective HDDs for less frequently accessed data. This redundancy ensures that even if one tier fails, the data remains accessible from the other tier, reducing the potential for data loss.
- Data Protection: Some storage tiering strategies also include data protection mechanisms such as RAID (Redundant Array of Independent Disks). RAID configurations distribute data across multiple drives, providing fault tolerance and protection against drive failures. This protects against potential data loss and ensures data availability even in the event of a drive failure.
- Intelligent Data Placement: Storage tiering and caching strategies use intelligent algorithms to determine the optimal placement of data across different storage tiers. This ensures that frequently accessed data remains in the faster tiers, while less frequently accessed data is moved to slower tiers. By intelligently managing data placement, these strategies optimize storage utilization and enhance data availability.
However, it's important to note that while storage tiering and caching strategies can improve data availability and reduce potential loss, they are not foolproof solutions. It's still crucial to regularly backup your data and implement other data protection measures to ensure comprehensive data security and availability.
How to take hard disks out of the NAS and connect them to a PC?
Although NAS TVS-EC1080 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 TVS-EC1080. 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
TVS-EC1080 has 10 HDD slots, and it supports the following array types:
- RAID 50;
- RAID 60;
- RAID 6;
- RAID 5;
- 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 TVS-EC1080 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 |
Yes, it is possible to recover data from a NAS QNAP TVS-EC1080 device that has been affected by a network attack or intrusion. However, the success of data recovery depends on various factors such as the extent of the attack, the level of damage caused, and the measures taken to mitigate the attack.
Here are some steps you can take to recover data from a compromised QNAP NAS device:
It's important to note that the success of data recovery may vary depending on the severity of the attack and the actions taken after the intrusion. Therefore, it is crucial to take immediate action and involve professionals to maximize the chances of data recovery.