Which of the following RAID levels is used for replicating and sharing data among disks and requires a MINIMUM of four disks?

RAID 0 (striping) distributes data across disks for performance but offers no data redundancy or replication and requires a minimum of two disks.

RAID 1 (mirroring) creates an exact copy of data on two or more disks for redundancy but does not involve striping for sharing data and requires a minimum of two disks.

RAID 0+1 (RAID 01) mirrors two RAID 0 striped sets; while it also requires four disks and provides redundancy, RAID 1+0 is generally preferred for its rebuild characteristics and is more commonly associated with the description of striping across replicated data.

RAID 1+0 (RAID 10) combines RAID 1 (mirroring) into RAID 0 (striping), meaning data is striped across multiple mirrored pairs. This configuration offers high performance due to striping and excellent fault tolerance from mirroring, and it requires a minimum of four disks to create at least two mirrored pairs that are then striped together.