RAID Level 1 mirrors the data from one disk to set of disks using which of the following techniques?

A.
Copying the data onto another disk or set of disks.

B.
Moving the data onto another disk or set of disks.

C.
Establishing dual connectivity to another disk or set of disks.

D.
Establishing dual addressing to another disk or set of disks.

Explanation:
RAID 1 or Mirroring is a technique in which data is written to two duplicate disks simultaneously
through a copy process. This way if one of the disk drives fails, the system can instantly switch to the
other disk without any loss of data or service. Disk mirroring is used commonly in on-line database
systems where it’s critical that the data be accessible at all times. RAID means “Redundant Array of
Inexpensive Disks”.