![]() ![]() ![]() Single parity, like in RAID 3, RAID 4, RAID 5 and RAID 7, allows the array to survive the failure of one drive, while double parity, like in RAID 6 compensates for two simultaneous drive failures. Two identical copies of data in RAID 1 allows recovering data without one member disk ĭata is split into blocks of a certain size, then a mathematical function is calculated for these blocks and its result is written onto a single disk or distributed between the constituents. The applied method of protection determines the bare minimum of intact disks that will suffice for data recovery: Redundancy in RAID may be achieved through parity or mirroring. Yet, unfortunately, even redundant configurations are unable to preserve the data in case of software crashes, accidental formatting or deletion and other logical mishaps. Such disk setups remain functional after the failure of a single or even several components, making it possible to perform a replacement without data loss. In order to maintain high availability of critical information and increase its safety, the majority of users prefer employing RAID configurations that provide fault tolerance. ![]() How can I recover data from a RAID set with redundancy? How can I recover data from a RAID set with redundancy?. ![]()
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