what is mean by raid?

Answer Posted / imran khan

RAID (redundant array of independent disks; originally RAID
is a way of storing the same data in different places
(thus, redundantly) on multiple hard disks. By placing data
on multiple disks, I/O (input/output) operations can
overlap in a balanced way, improving performance. Since
multiple disks increases the mean time between failures
(MTBF), storing data redundantly also increases fault
tolerance.

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