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Method To Improve Head Disk Interface Reliability During Idle Mode Disclosure Number: IPCOM000013075D
Original Publication Date: 2002-May-15
Included in the Prior Art Database: 2003-Jun-12

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During the idle mode, no specific information is required to be read from or written to the drive. Therefore, during the idle mode there is more freedom to access or to avoid certain areas on the disk. However, currently this algorithm does not take advantage of all the information available about the head disk interface. During production, defects on the disk surface are mapped out. In particular, during production, SAT defects are mapped out. Head disk interface (HDI) crashes often emanate from the larger defects. This new method will avoid these large defects during the idle algorithm to avoid unnecessary stressing of the head disk interface. The new algorithm will have to contain a conditional test allowing the heads to sweep to a certain track during "SAFE" only if the slider will avoid flying over regions containing such larger defects. 1