Which server configuration provides the highest fault tolerance?

RAID 1 is recognized for offering the highest level of fault tolerance among the choices listed. This configuration uses disk mirroring, where data is simultaneously written to two or more drives. In the event of a hard drive failure, the system can continue operating normally using the mirrored disk without any data loss or significant downtime.

RAID 1 ensures that there is always a backup of the data available on a separate drive, which is key for maintaining data integrity and availability. This redundancy is critical in environments where uptime and data access are vital, making RAID 1 a preferred choice for applications requiring high availability and reliability.

The other configurations listed do not provide the same level of protection against data loss. Standard non-redundant servers lack any form of backup or failover, leaving data vulnerable. RAID 0 offers improved performance but does so at the cost of fault tolerance; if one drive fails in a RAID 0 configuration, all data is lost because the data is split across multiple disks without redundancy. Finally, single points of failure create vulnerabilities where the failure of one component can lead to system-wide failure, making them unsuitable for critical applications requiring high availability. Therefore, RAID 1 stands out as the most reliable option for protecting data through redundancy