Which RAID configuration consists of mirrored disks?

RAID 1 is the configuration that consists of mirrored disks. In this setup, data is duplicated on two or more disks, meaning that when data is written to one disk, it is simultaneously written to another disk. This mirroring process provides a significant advantage in terms of data redundancy and reliability. If one disk fails, the system can continue to operate using the other disk with no data loss, as both disks contain identical information.

Data integrity is maintained, as the mirrored setup provides an immediate backup of data. In addition, RAID 1 can improve read performance since data can be read from both disks simultaneously, although write performance may be slightly affected due to the need to write the same data to multiple locations.

The other RAID configurations serve different purposes: RAID 0 offers no redundancy but improves speed by striping data across multiple disks, RAID 5 and RAID 6 use a combination of striping and parity to provide fault tolerance, but they do not involve mirroring data in the same way RAID 1 does. Thus, RAID 1 is distinctly characterized by its mirrored disks, which ensures that each piece of data has an exact copy for protection against disk failure.