A system administrator needs to maintain 1.2TB of storage for a database server. There are six 250GB drives available in the server for storage space. Which of the following RAID configurations would

RAID 1 mirroring across three pairs would only yield 3 * 250GB = 750GB (0.75TB) of usable space, which is insufficient for the 1.2TB requirement.

RAID 5 utilizes N-1 drives for data storage and one drive for parity, offering (6-1)*250GB = 1.25TB of usable space which meets the 1.2TB requirement. It provides fault tolerance against a single drive failure and offers a good balance of read/write performance for database servers.

RAID 10 combines mirroring and striping, resulting in (6/2) * 250GB = 750GB (0.75TB) of usable space, which is less than the required 1.2TB.

RAID 0 provides no fault tolerance; if any single drive fails, all data on the array is lost, making it unsuitable for a database server where fault tolerance is important.