Among the following RAID levels, which one has the highest utilization of disk space?

RAID 0 provides the highest disk space utilization because it strips data across multiple disks without any form of redundancy. This means that all the available storage capacity of each disk is utilized for data storage rather than for storing parity information, which is a requirement for other RAID levels that implement redundancy.

In RAID 0, every disk in the array contributes its entire capacity to the total storage space. For instance, if two 1 TB drives are used in a RAID 0 configuration, the total usable space would be 2 TB. This contrasts significantly with RAID configurations that provide redundancy, where some portion of the space is allocated to redundancy methods like mirroring or parity calculations.

As a result, RAID 0 is ideal for environments where performance and maximum available storage are the primary concerns, and data redundancy is not a requirement. However, it is crucial to note that RAID 0 does not provide fault tolerance; if one drive fails, all data in the array is lost, which is a significant trade-off for the high utilization of space.