Adaptive shock detection

An adaptive shock detection system, comprising:

• a shock sensing circuit;
• and
• a controller configured to:
• receive shock detection signals from the shock sensing circuit and to dynamically adjust a sensitivity of the shock sensing circuit based on the received shock detection signals,
• count a number of the shock detection signals from the shock sensing circuit over a first time window and to adjust the sensitivity of the shock sensing circuit based on the number of the shock detection signals,
• count a number of the shock detection signals from the shock sensing circuit over a second time window and to increase the sensitivity of the shock sensing circuit if the number of the shock detection signals over the second time window is below a second number, and
• decrease the sensitivity of the shock sensing circuit if the number of the shock detection signals over the first time window exceeds a first number,
• wherein the first time window comprises two time periods of track following in a disk drive and excludes a time period of track seeking in the disk drive between the two time periods of the track following, and wherein the second time window is longer than the first time window.

An adaptive shock detection system, comprising:

• a shock sensing circuit configured to output first shock detection signals and second shock detection signals;
• and
• a controller configured to:
• receive the first and second shock detection signals from the shock sensing circuit,
• abort write operations based on the first shock detections from the shock sensing circuit,
• count a number of the second shock detection signals from the shock sensing circuit, and
• dynamically adjust the sensitivity of the shock sensing circuit based at least on the number of the second shock detection signals.

A method for adaptively adjusting a shock sensing circuit, comprising:

• receiving first shock detection signals and second shock detection signals from the shock sensing circuit;
• aborting write operations based on the first shock detections from the shock sensing circuit;
• counting a number of the second shock detection signals from the shock sensing circuit;
• and
• adjusting a sensitivity of the shock sensing circuit based on the number of the received second shock detection signals.

A method for adaptively adjusting a shock sensing circuit, comprising:

• receiving shock detection signals from the shock sensing circuit;
• counting a number of the shock detection signals from the shock sensing circuit over a first time window and second time window, wherein the second time window is longer than the first time window;
• and
• adjusting a sensitivity of the shock sensing circuit based on the received shock detection signals based on decreasing the sensitivity of the shock sensing circuit if the number of the shock detection signals over the first time window exceeds a first number and increasing the sensitivity of the shock sensing circuit if the number of the shock detection signals over the second time window is below a second number.