Patent ID: 8000057
Filing Date: 2011-08-16
Classification: G11B

Abstract:
1. A timing-based servo module in a linear tape drive, comprising: a first synchronous servo channel coupled to receive a first digital servo signal read from a data tape by a servo element, the first synchronous servo channel comprising: a second synchronous servo channel coupled to receive a second digital servo signal read from the data tape by the servo element, the second synchronous servo channel comprising: a weight computation module operable to provide a first weight signal and a second weight signal using the measures of channel reliability from the first and second synchronous servo channel; an offset computation module operable to provide a first offset term and a second offset term using the first and second measures of reliability and the first and second unweighted parameter estimates from the first and second synchronous servo channels; a first summing node coupled to receive the first unweighted parameter estimate and the first offset term; a second summing node coupled to receive the second unweighted parameter estimate and the second offset term; a first multiplying node coupled to receive an output from the first summing node and the first weight signal and operable to output a first offset weighted parameter estimate; a second multiplying node coupled to receive an output from the second summing node and the second weight signal and operable to output a second offset weighted parameter estimate; and a third summing node coupled to receive the first and second offset weighted parameter estimates and operable to output a combined offset weighted parameter estimate to a servomechanism.