1. A method for implementing head degradation detection and field failure prediction for hard disk drives (HDDs), said method comprising: calculating two or more confidence level indicators for predefined HDD head parameters; comparing said calculated confidence level indicators with a respective predefined threshold value for the predefined HDD head parameters for providing a head failure prediction; and identifying both soft error rate (SER) fluctuations, and an error recovery procedure (ERP) count exceeding a prespecified threshold, to provide the head failure prediction.