9112: S.M.A.R.T. Attribute: Power Cycle Count

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Applies to: 

Operating Systems: 

Attribute ID: 12 (0x0C)

Hard drives, supporting this attribute

Samsung, Seagate, IBM (Hitachi), Fujitsu, Maxtor, Western Digital


Power Cycle Count S.M.A.R.T. parameter is an informational parameter and indicates the count of full hard disk power on/off cycles.


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.