Narrow band dwell monitoring

A hard disc drive comprising:

• a storage platter;
• an overflying air-bearing slider;
• a narrow band dwell monitor to:
• detect an air-bearing slider position with respect to the storage platter;
• apply a lubrication film displacement formula to a narrow band of the storage platter below the overflying air-bearing slider;
• apply a lubrication film reflow formula to one or more other narrow bands of the storage platter away from the overflying air-bearing slider;
• and
• track lubrication film thickness over time in the narrow bands of the storage platter based on the applied displacement and reflow formulae;
• and
• a narrow band mitigator to perform one or more of a seek operation, a drive processing alteration, and a slider fly height alteration in response to tracked lubrication film thickness of a narrow band of the storage platter affected by the overflying air-bearing slider falling below a minimum value.

One or more non-transitory computer-readable storage media encoding computer-executable instructions for executing on a computer system a computer process that monitors narrow band dwell in a hard disc drive, the computer process comprising:

• detecting an overflying air-bearing slider position with respect to a storage platter below the air-bearing slider;
• applying a lubrication film displacement formula to a narrow band of the storage platter below the overflying air-bearing slider;
• applying a lubrication film reflow formula to one or more other narrow bands of the storage platter away from the air-bearing slider;
• tracking lubrication film thickness over time in the narrow bands of the storage platter based on the applied displacement and reflow formulae;
• and
• performing one or more of a seek operation, a drive processing alteration, and a slider fly height alteration in response to tracked lubrication film thickness of a narrow band of the storage platter affected by the overflying air-bearing slider falling below a minimum value.