- 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 Infortrend also introduce some modifications to this process, and that is why data can be written to hard disk in a wide variety of ways.
Can the use of specific data compression or deduplication techniques impact the performance and data integrity on NAS Infortrend JB 3025B devices?
The use of specific data compression or deduplication techniques can potentially impact the performance and data integrity on NAS Infortrend JB 3025B devices.
Data compression techniques aim to reduce the size of the data being stored by removing redundant information, which can help save storage space. However, the compression process itself requires computational resources, such as CPU power, to compress and decompress the data. If the NAS device's CPU is not powerful enough, enabling compression may result in slower performance as it takes longer to process the data.
Similarly, deduplication techniques identify and eliminate duplicate data blocks, saving storage space by storing only unique blocks. However, deduplication requires additional processing power and memory to compare and identify duplicate blocks. If the NAS device lacks sufficient resources, enabling deduplication may negatively impact performance.
In terms of data integrity, compression and deduplication introduce additional complexity to the storage system. If the compression or deduplication algorithms have any flaws or bugs, it could potentially lead to data corruption or loss. It is crucial to regularly backup data and ensure the reliability and stability of the compression or deduplication techniques being used.
Overall, while compression and deduplication techniques can be beneficial in terms of storage efficiency, their impact on performance and data integrity should be carefully evaluated, considering the specific capabilities and resources of the NAS Infortrend JB 3025B devices.
How to take hard disks out of the NAS and connect them to a PC?
Although NAS JB 3025B 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 Infortrend JB 3025B. 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 Infortrend
JB 3025B has 25 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;
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 Infortrend JB 3025B 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.
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 |
In most cases, data recovery from a NAS (Network Attached Storage) device like the Infortrend JB 3025B can be possible even if the device is showing signs of disk or storage media errors. However, the success of data recovery depends on the extent and nature of the errors.
If the errors are logical, such as file system corruption or accidental deletion, data recovery is usually relatively straightforward. In such cases, specialized data recovery software or services can be used to recover the data from the NAS device.
However, if the errors are physical, such as a failed hard drive or other hardware issues, the data recovery process becomes more complex. In these situations, it is recommended to contact a professional data recovery service provider with expertise in NAS devices and RAID systems.
Professional data recovery services have the necessary equipment, expertise, and cleanroom facilities to handle physical disk or storage media errors. They can diagnose and repair the faulty hardware components, and then proceed with the data recovery process.
It is important to note that attempting DIY data recovery methods or using unreliable software can potentially worsen the situation and lead to permanent data loss. Therefore, it is advisable to seek professional help for data recovery from a NAS device showing signs of disk or storage media errors.