Abstract
One of the major contributors to head positioning error is carriage vibration in low frequency due to the air flow caused by the disk rotation. We experimentally studied the reduction of the flow-induced carriage vibration using linear protuberance structure by putting wires on the carriage arms. This study was carried out using 2.5 inch HDDs which has high rotational speed of 10krpm. We measured the position error signal and compared with the conventional carriage arms. From the experimental result, the linear protuberance structure we proposed is effective to reduce the carriage vibration. We confirmed that our new structure decreased the non-repeatable position error by 8.5% for outer positioning.
