Patent ID: 8279733

Claim:
A dynamic write strategy modification method, comprising: writing data onto a disc according to a plurality of default write strategies, each default write strategy corresponding to a pattern combination; selecting a parameter of the default write strategies; determining a plurality of values of the selected parameter; writing data onto the disc separately according to different write strategies corresponding to the plurality of values, wherein each writing with the different write strategies is performed alternately with a writing with one of the plurality of default write strategies; stopping writing and measuring a quality index of the pattern combination of the written data; adjusting the default write strategies of the pattern combinations to generate a plurality of modified write strategies according to the quality indices; and resuming writing with the modified write strategies to write data; wherein the quality index is a mean rising edge deviation value, and a rising time difference T diff between a rising time T top — I of the default write strategies and a rising time T top — II of the modified write strategies corresponding to the mean rising edge deviation value ofs_top is shown in the following: T top — II −T top — I =T diff =X *ofs_top+ Y; wherein X and Y are tunable variables.