Method and apparatus for alternatively reading or writing data to a servo surface of a hard disk drive

摘要: A circuit for enabling the writing of servo data by a transducer to dedicated surface hard disk drive during manufacture while only reading at subsequent times that is mated computer. The receives power on selected terminals connector and includes level detector provides first control signal in response supply voltage below exceed levels available from user computer second above level. transmitted switch assembly responds providing direct connection between connector. switches means which an amplifier, having inputs connected outputs terminals, supplied with electrical power. Servo patterns are written time operating exceeds read supply.