Patent ID: 6738851
Filing Date: 2004-05-18
Classification: G06F

Abstract:
A hot swap circuit board adaptable for a computer-disk drive interface of a computer-disk drive system, comprising:a key-switched power supply control circuit to provide power supply and a security logic signal, a set of logic switchable impedance circuits to provide a set of computer-supplied control signals; a logic control circuit to provide a READ command signal and a WRITE command signal in response to the security logic signal and the set of computer-supplied control signals; and a number of logic switchable bi-directional impedance circuits corresponding to a number of data signals defined in the computer-disk drive interface; whereby the hot swap circuit board performs a function of safe hot swapping of a disk drive attached to the computer-disk drive interface without having to cycle the power of the computer-disk drive system while satisfying a requirement of disk mirroring operation wherein an operating computer software can not be interrupted and no special software can be started.