Patent ID: 6154331
Filing Date: 2000-11-28
Classification: G11B

Abstract:
A disk controller write-gate apparatus comprising:a first logic circuit configured to accept inputs indicative of the status of a disk controller and timing information, said first logic circuit providing a write enable signal;a disk sequencer having a sequencer write gate output and a sequencer data output, said sequencer providing a sequencer write gate signal at said write gate output in response to said write enable signal, wherein said write gate signal is provided later in time than said write enable signal; and,a second logic circuit connected to said first logic circuit, said sequencer data output, and said write gate output, wherein said second logic circuit provides a predetermined data signal in response to said write enable signal and provides a sequencer data signal from said sequencer data output in response to said write gate signal, and wherein the predetermined data signal and the sequencer data signal are provided in response to a servo input received from a disk based upon a predicted position of a disk drive head of the disk without synchronizing the servo input to a reference clock such that the predetermined data signal and the sequencer data signal are provided in a minimal time after receiving the servo input.