Patent ID: 8307183
Filing Date: 2012-11-06
Classification: G11B

Abstract:
1. An information storage medium comprising: a user data area in which user data is recorded; a first area having a first recording unit comprising first data, padding data, second data and third data which are recorded in an order of the first data with a variable size, the padding data to fill an unrecorded area, the second data with a variable size, and the third data with a fixed size, wherein the padding data precedes the second data, and the second data immediately precedes the third data; and a second area other than the first area and having a second recording unit comprising a plurality of data frames in which a copy of the third data is recorded in a first data frame of the plurality of data frames, a copy of the second data is recorded in from a second data frame of the plurality of data frames, and the padding data is recorded in remaining data frames of the plurality of data frames in that order, wherein: the copies of the second and third data are to be used by a recording and/or reproducing apparatus to manage the user data recorded in the user data area; and the first and second areas are other than the user data area, wherein the copy of the third data which is recorded in the second area comprises location information on the second data recorded in the first area.