Patent ID: 6236527
Filing Date: 2001-05-22
Classification: G11B

Abstract:
A disk drive comprising:a load/unload mechanism to position a head/slider mounted on an actuator over a disk and remove the head/slider from proximity with the disk;a shock sensor for detecting shock events;a load/unload control means for aborting loading and for causing the actuator to be unloaded from the disk when a shock event detected by the shock sensor exceeds a threshold;a first analog to digital converter connected to the shock sensor which outputs a digital value corresponding to an analog voltage generated by the shock sensor in response to shock;a CPU which executes stored program code to read the digital value from the first analog to digital converter and compare the digital value to the threshold;a counter which tracks a number of aborted attempts in a selected time period the loading has been aborted; andprogram code executed by the CPU for ending attempts to load if the number of aborted attempts has reached a predetermined number.