Patent ID: 6766478
Filing Date: 2004-07-20
Classification: G06F

Abstract:
A protective circuit for protecting bard disk data, comprising:a first hard disk coupling device connected to a hard disk port of a motherboard; a second hard disk coupling device connected to a hard disk; a hard disk signal processor coupled to the first hard disk coupling device, the second hard disk coupling device, and a microprocessor; a random access memory (RAM) connected to the microprocessor; and a nonvolatile semiconductor memory having program codes for running in the microprocessor to convert a read/write instruction from/to a main data space of the hard disk into a read/write instruction from/to a virtual data space in a conversion mode or executing a direct read/write instruction from/to the main data space in a setup mode; wherein if data stored in the virtual data space are corrupted, the protective circuit is controlled to copy the data in the main data space to the virtual data space to recover the virtual data space.