Patent ID: 7218587
Filing Date: 2007-05-15
Classification: G11B

Abstract:
1. A method for determining the writing power of a data recording device in a writing process, wherein the writing speed for the inner circle of recording media is the minimum write speed of the data recording device, the write speed for the outer circle of recording media is the maximum write speed of the data recording device, and the time of write speed is raised form the minimum write speed to the maximum write speed is Δt, comprising the steps of: processing optimum power calibration (OPC) on the inner circle of recording media to obtain an inner circle optimum writing power P 1 ; processing optimum power calibration (OPC) on the outer circle of the recording media to obtain an outer circle optimum writing power P 2 ; and determining the writing power according to P 1 , P 2 and Δt, wherein the writing power at time t is P 1 +(P 2 −P 1 )*(t/Δt).