RAID systems (arrays of hard drives that operate against the operating system as a single drive) are by definition very reliable. In general, they provide not only large storage capacity but also a failsafe system. While this statement is true, it is also true that you must be alert since when chained failures or human failures occur, access to data can be lost.
It is a process used to combine several hard drives and make them work in a coordinated way to form a single logical unit in which to store data.
We have performed raid data recovery from all types of RAID systems, level 0, 1, 2, 3, 4, 5, 6, 10, 53 among others. Each one evidently presents its particularities, but in general the most common causes that cause the system to be unable to recover the data by itself after a failure occur are the loss of parity bands, physical failures of chained hard drives and human failures. The recovery of data by an external company then becomes an essential service.
RAID System Failures
Loss of the parity bands happens rarely but it is a "logical" failure of the system, which the RAID is not capable of solving on its own and requires external intervention to locate and rebuild them in order to recover data from the system RAID and being able to access the information again.
Physical failures are not frequent, no more than on any separate hard drive. It could be estimated that between 2% and 3% of installed hard drives per year can fail. But yes, the RAID is made up of hard drives that suffer the same problems as any other hard drive: virus attacks, data erasure, system corruption, poorly installed drivers, voltage spikes, extreme temperatures, defective components and mechanical failures. This type of failure may lead to the need to hire a data recovery service.
When a disk fails, if we have for example a RAID 5 the system can be recomposed, we simply change the defective hard disk to a new one and automatically the system rebuilds the non-accessible information. Problems appear when a second failure of another hard drive occurs during this process. When more than a third of the hard drives fail, the system will not be able to recover and the intervention of an expert company in recovering data from RAID systems will be required.
Human failures are mainly due to not changing a hard drive in time, thinking that it has failed but will not fail again. We must always change a minimally defective unit, the risk of losing the data is too high. On other occasions the proper process has not been followed in the event of repetitive power cuts, the batteries in the uninterruptible power supply have been depleted and the equipment has been switched off incorrectly.
Ask us about your RAID problem, we will put all our experience at your service to recover your RAID data in the shortest possible time. In the case of RAID systems, the diagnosis has a cost, because different tools and different recovery methods are used in this process than in the case of individual hard drives. The price of performing the diagnosis will vary depending on the type of system and the number of disks in it.
The new technologies implemented in the storage devices increase day by day not only their storage capacity but also their operational security. However, we recommend that backups of mobile phones and smart phones, as well as hard drives, RAID systems or any other storage medium in service are systematically made. In the event of an unforeseen failure or failure, we can thus recover the data when accessing the backup system.
If you still cannot access your data, please contact Salvage Data international before starting any data recovery process. When data is very valuable and essential, only a company specialized in recovering data from smart phones, tablets, hard drives and RAID systems can give you a solution with guarantees.