RAID, an acronym for Redundant Array of Independent Disks, is a technique for storing computer data, by dividing and/or reproducing it, on various hard disks. These disks are (by default) arranged into arrays (as the name suggests) for redundancy and increase performance and reliability, when compared to single disks. To put it simply, when two or more hard disks are used together, by applying RAID technology, they form a RAID array. Based on their arrangement, they are categorized as RAID-0, RAID-1, RAID-3, RAID-5, RAID-6, RAID-7, RAID-10, RAID-50, RAID-53, RAID-S, RAID-01, etc. These configurations or levels, are used in different data critical applications and have different levels of performance and fault tolerance benefits.

These RAID configurations also have different levels of data loss susceptibility. A RAID device, while writing, generally writes all the redundant copies of a file/object simultaneously, in one go. So, if a write error occurs (during the writing process), it leaves the redundant copies in varying states, which may neither be the old state, nor a new state. And the RAID technology, for backing logical changes, depends entirely on the state of original data, which should be either completely in the old state, or fully in the new state. In case of power or system failure, all the data queued in cache is lost. Battery-backed write cache may help avert loss of data due to power outage, but provided the battery is not worn out, nor is the power out for long hours. Even in the absence of these problems, data loss may occur. A sure shot way to prevent data loss is regular data backup.

But today, thanks to advance in technology, RAID recovery services are also available. These services include recovery of all the data after any kind of physical or logical data loss. A large number of tools and techniques are used to recover data from RAID storage media. Apart from RAID data recovery services, data recovery is possible from other storage media as well, like external and internal hard drive, laptop, USB drive, pen drive, ipod, memory card etc. But, one should know that data recovery cannot be done by just anybody. To ensure the sanctity of your data, and for complete recovery of it, you must consult the specialists.

ISO 9001:2000 certified, Stellar Informations Systems Ltd., is one leading organization that specializes in computer data recovery from all kinds of storage media. With its Class 100 cleanroom, and a 'No Recovery No Charge Policy', it sets stage for transparent and effective data recovery. With proprietary high-end technology and latest cutting-edge tools, Stellar treads the path of data recovery, way ahead of all its competitors.