Technology never stops inventing new strategies to improve the digital world. Since the invention of RAID, the redundant array of independent disks, IT professionals no longer have any concerns about the security of their data, thanks to its optimal performance. But how can data be recovered on this system? What are the procedures? In this article, we will try to give some answers on this topic.
RAID 0: what is it?
Before starting on the definition of the RAID 0 system, let’s first discover its meaning.
RAID
Throughout its existence, RAID has stood out mainly for its ability to bring together several data storage devices, regardless of the number of disks on a motherboard. This grouping offers you performance and high reliability, at a price well below other recovery tools.
The use of such an architecture provides an answer to this issue. In the event of a disk failure, its operation would not be interrupted. However, if your disk fails, the data will be automatically rebuilt on the other disks.
Indeed, this recovery system can help you:
- Reduce your data loss in the event of a disk failure;
- Provide optimal performance;
- Limit the loss of data integrity in the event of failure of one of your disks.
RAID 0
This type of RAID involves combining at least two hard drives. Note that the bandwidth of a RAID 0 is higher than that of a single disk. More specifically, it has enormous capacity, particularly for its read and write speed.
The total capacity of the RAID represents the combined capacities of the RAID array. It equals 3 To for three disks of the same capacity, namely 1 To each. The capacity of the RAID 0 system corresponds to the capacity of the smallest disk multiplied by three: 500 x 3 = 1500 Go.
Performing RAID data recovery
Generally, a RAID fails for various reasons. Before recovery, many factors must be considered.
Please see below the two families of failures:
- Hardware failures: if a disk unit has a physical failure, a RAID 0 system can be considered to have a hardware failure;
- Software failures: in this case, the RAID hard drives must be functional and none of them should contain bad sectors.
The RAID 0 system becomes inoperative when one of the RAID 0 hard drives is inaccessible. You therefore need to restore the data. To do this, regardless of the type of failure, you must base the recovery on solid principles, in particular preserving the source and ensuring data security.
If you wish to carry out a recovery task, please follow these steps carefully.
- Cloning the RAID 0 hard drives: the data must be accessible on the storage media.
- Analyzing the clones: you must absolutely not alter the clones.
- Creating an image of the RAID 0: this image can take the form of a saved file or an image on a disk.
- Extracting useful data: this is the analysis of the created image. This procedure facilitates data recovery.
The possibilities and limitations of the RAID system
As we have seen previously, this type of RAID offers no fault tolerance. Data recovery from a RAID 0 can only be carried out using the RAID’s hard drives. This process is known as “data recovery”.
So, for this recovery to be possible, you need to be aware of two pieces of information:
- The disk arrangement;
- Block size: stripe size, chunk size and clock size.
If one of the RAID hard drives is completely damaged, it is still possible to recover files. To do this, you need to replace the failed disk with a blank disk to rebuild the RAID 0 array. If you encounter difficulties, you can always use recovery software to minimize data loss.
Like any IT hardware, this system has its limitations.
- It cannot protect data that has been accidentally deleted.
- It cannot safeguard data against viruses.
- It cannot protect the user from accidents such as power surges, fire, flooding, etc.