Patent ID: 7715133
Filing Date: 2010-05-11
Classification: G11B

Abstract:
1. A method for duplicating data of a source medium to at least one target medium, comprising the steps of: a) making the source medium, in which ground data and effective data are stored, wherein a ground datum is repeatedly stored in the source medium, and the effective data, which are data for duplication, overwrite some of the ground data, wherein each of the overwritten ground data is partially or entirely overwritten; b) reading data of the source medium, wherein a size of the data is as same as that of the ground data; c) comparing the data to the ground data, wherein if the data are not as same as the ground data, then copy the data to the at least one target medium; and if the data are as same as the ground data, then take no duplication; and d) reading next data of the source medium and repeating the step c.