Datenintegritätsvorrichtung für einen Plattenantrieb bei einer Stromversorgungsunterbrechnung

摘要

A disk drive package (10) includes read/write circuits, a disk drive mechanism and a microprocessor (36). The microprocessor (36) has a dedicated function input (34) and an interrupt input (38). The dedicated function input (34) is accessible through an external connector (20) in the disk drive package (10), but the interrupt input (38) has no direct external access. The microprocessor (36) is programmed to examine the dedicated function input (34) only upon power-up to determine if it has been enabled. The disk drive package (10) is modified to include a circuit (40, 42, 44, 46) that couples the dedicated function input (34) to the interrupt input (38) to the microprocessor (36). A power supply (30) provides a power fail imminent signal to the dedicated function input (34), and because the dedicated function input (34) is connected to the interrupt input (38), such signal causes an interrupt to occur in the operation of the disk drive whereby any write to disk in progress is completed prior to a power fail event.