How to recover Data from RAID
This tutorial covers Data recovery from RAID Hard Drive and RAID Servers. This tutorial will also guide you through the basics of RAID technology. Please note that mechanical RAID problems require a large amount of technical expertise.
How RAID is different from a Hard Drive?
There are obvious differences between a RAID array and a hard disk drive. A hard drive is an individual data storage device used for storing and retrieving digital information.
What is RAID?
RAID is an acronym for Redundant Array of Independent (or Inexpensive) Disks. It provides a way of storing the same data in different places on multiple hard disks. By placing data on multiple disks, input/output (I/O) operations can overlap in a balanced way, improving performance.
RAID Storage System :-The main methods of storing data in the array are:Striping – Splitting the flow of data into blocks of a certain size (called “block size”) then writing of these blocks across the RAID one by one. This way of data storage affects the performance.
- Mirroring is a storage technique in which the identical copies of data are stored on the RAID members simultaneously. This type of data placement affects the fault tolerance as well as the performance.
- Parity is a storage technique which is utilized striping and checksum methods. In parity technique, a certain parity function is calculated for the data blocks. If a drive fails, the missing block are recalculated from the checksum, providing the RAID fault tolerance.
Different level of RAIDs are RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
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