Fault-Tolerance

The ability of a system to continue to perform its functions even when one or more hard disk drives have failed.

Fault–tolerance is the ability of computer hardware or software to ensure data integrity when hardware failures occur. Fault-tolerant features appear in many server operating systems and include mirrored volumes, RAID– volumes, and server clusters.

The ability of a processor to maintain mission effectiveness after some subsystems failed.

The ability of a system to respond to an event such as a power failure so that information is not lost and operations continue without interruption. [Exchange 5.5]

The extent to which a functional unit will continue to operate at a defined performance level even though one or more of its components are malfunctioning.