Patent ID: 7518978
Filing Date: 2009-04-14
Classification: G11B

Abstract:
1. A method for reproducing user data from a storage medium having a plurality of recording layers, each recording layer including a lead-in area, a user data area, a lead-out area, and a dedicated area, the method comprising: reproducing the user data from the data areas of the recording layers, wherein an amount of the user data on the recording layers is less than a total capacity of the user data areas, and was equally divided among the user data areas during recording such that each user data area has an equal amount of the user data, capacities of the user data areas vary equally according to the amount of the user data that is recorded, and each of the recording layers includes an unrecorded area, where user data is unrecorded, between the lead-out area and the dedicated area, and each unrecorded area has an approximately equal capacity and is positioned at the same radial position of the each recording layer.