To provide fault tolerance, RAID 1 writes the same data twice on two separate drives. RAID 1 provides you with good fault tolerance and is simpler than RAID 1-0. This layout is useful if read performance is more essential than write performance or resulting data storage capacity. Since data is mirrored on all disks belonging to an array, an array can be as large as the smallest member disk. A classic RAID 1 pair offers no parity, spanning or striping of disk space across multiple disks. RAID 1 consists of a copy, or a mirror, of data on two or more disks. In this case, you should follow the instructions provided below. If you are not sure about your skills, don’t try to restore data manually. Recovery is complicated for those who are not computer professionals. RAID mirrors data and uses the architecture of RAID to write information on disks simultaneously. RAID is not about data backup, but about volume redundancy on disks. It is a convenient way to store databases that need parity to function better. Many people use the RAID 1 array for storing financial data and small database systems.
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