Data sector pulse generating method
AssigneeSamsung Electronics Co., Ltd.
InventorKwang-Jo Jung
Life of this patent
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Abstract
A method of generating data sector pulse in a magnetic disk drive includes the steps of servo-writing a bit of index pattern information corresponding to each servo sector in an index area of a servo area on the magnetic disk by a predetermined rule, mapping a data sector pulse timing value with respect to a representative frame of each zone in an inside storage by changing the frame number of relevant zone according to the characteristic of each zone, and reading a sector pulse timing value with respect to a predetermined sector of a predetermined track from the inside storage by deciphering the index pattern information read from the track according to the rule and loading the read result in a gate array for generating the data sector pulse.
Claims8
A method of generating a data sector pulse in a magnetic disk drive comprising the steps of:
- servo-writing a bit of index pattern information corresponding to each servo sector in an index area of a servo area on said magnetic disk by a predetermined rule;
- mapping a data sector pulse timing value with respect to a representative frame of each zone in an inside storage by changing the frame number of a relevant zone according to the characteristic of each zone;
- and
- reading as sector pulse timing value with respect to a predetermined sector of a predetermined track from said inside storage by deciphering said index pattern information read from said track according to said rule and loading the read result in a gate array for generating said data sector pulse:
- wherein said index bit information is structured such that plural pieces of index bit information make one group and a plurality of said groups are present on one track, and
- wherein each said group comprises a key pattern which identifies the plural pieces of index information as a group and a group value which designates a group number of a corresponding group.
A method of generating data sector pulse in a magnetic disk drive where a data sector pulse timing value with respect to a representative frame of each zone is mapped in an inside storage by changing the frame number of relevant zone according to the characteristic of each zone, and a magnetic disk where a bit of index pattern information corresponding to each servo sector is recorded in an index area of a servo area by a predetermined rule during servo-writing, said generating method comprising the steps of:
- storing index pattern information of a predetermined number following a first index pattern information as a first group value when said first index pattern information of a predetermined sequential number is congruous with a preset key pattern by inputting of a plurality of pieces of said index pattern information read from a predetermined track;
- storing index pattern information of a predetermined number following a second index pattern information as a second group value when said second index pattern information of a predetermined number following said first group value is congruous with said key pattern after said first storing step;
- calculating a sector number by using said second group value when said first and second group values are in sequence;
- determining a current sector number by using the sector number calculated in said calculating step when applied index pattern information is congruous with expectative index pattern information after said calculating step;
- and
- confirming a zone number of a current track by using servo information of a servo area and loading the data sector pulse timing value corresponding to the current sector number of said confirmed zone according to said current sector number in a gate array for generating said data sector pulse.
Dependencies are inferred from the claim text.