Patent ID: 6069572
Filing Date: 2000-05-30
Classification: G11B

Abstract:
A method of encoding position information for Pth zone on a recording medium, the recording medium having a plurality of zones 1 through Q, each zone havinga plurality of subtracks 0 through M, each of said subtrack having a plurality of sectors 0 through N, each said sector having a position identifier field, each said position identifier field having a plurality of information units for recording a position identifier, position identifier in Nth sector of subtrack M identified as S(M,N) , said position identifier having a value,the method comprising the step of:choosing the values of position identifiers S(M,N) and S(M,N-1) for a zone P such thatthe difference of the values of S(M,N) and S(M,N-1) for Pth zone are different from the difference of the values of S(M,N) and S(M,N-1) for all other zones, for all values of M and N.