Which RAID configuration should be used for disk redundancy with the minimum number of disks?

RAID 1 is an effective configuration for achieving disk redundancy while utilizing the minimum number of disks. In RAID 1, data is mirrored across two disks, meaning that each piece of information is written identically to both drives. This setup ensures that if one disk fails, the other can take over seamlessly, maintaining data integrity and availability.

Using only two disks, RAID 1 provides straightforward redundancy, which is essential for data protection. Additionally, since both disks are identical copies, recovery from a failure is typically quick and efficient, as only one disk needs to be replaced and rebuilt.

Other RAID configurations, such as RAID 5, require a minimum of three disks for redundancy. While RAID 5 offers a good balance of performance, capacity, and fault tolerance through parity data, using three disks makes it less optimal for scenarios where the minimum number of disks is a consideration. RAID 0, on the other hand, provides no redundancy, as it stripes data across multiple disks without mirroring or parity, rendering it unsuitable for anyone needing disk redundancy. RAID 10 requires at least four disks, as it combines the benefits of both RAID 1 and RAID 0, thus also exceeding the requirement for a minimum disk count for redundancy.

In conclusion,