9156: S.M.A.R.T. Attribute: GMR Head Amplitude

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Applies to: 

Operating Systems: 

Attribute ID: 230 (0xE6)

Hard drives, supporting this attribute

Samsung, Seagate, IBM (Hitachi), Fujitsu (not all models), Maxtor, Western Digital (not all models)


GMR Head Amplitude S.M.A.R.T. parameter indicates a head moving distances between operations.


This parameter is considered informational by the most hardware vendors. Although degradation of this parameter can be an indicator of drive aging and/or potential electromechanical problems, it does not directly indicate imminent drive failure. Regular backup is recommended. Pay closer attention to other parameters and overall drive health.

More information

See also: S.M.A.R.T. Monitoring.