A high availability solution must be designed for a single file server. Data must be replicated between the disks to ensure a failure of one disk does not bring down the server. Which of the following

RAID 1, also known as mirroring, creates an exact duplicate of data on two or more disks. If one disk fails, the system can continue to operate using the mirrored data on the remaining disk, thus providing high availability for disk failures within a single server.

RAID 0, or striping, distributes data across multiple disks without redundancy; a single disk failure results in complete data loss and server downtime.

An active/passive cluster provides high availability at the server level, not specifically for disk redundancy within a single server.

"Disk-to-disk" is a general term for data transfer or backup between disks, not a specific RAID level or high availability solution for disk redundancy.