Servo sector format for a patterned media
AssigneeSeagate Technology LLC
InventorKarl A. Belser
Life of this patent
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Abstract
A servo sector format for a patterned media, such as a magnetic media, includes a first patterned servo timing mark, a patterned gray code, a plurality of PES burst separators, and a second patterned servo timing mark. The first patterned servo timing mark indicates the start of a servo sector. The plurality of PES burst separators are areas where no data can be written. A plurality of servo burst fields are written magnetically between the plurality of PES burst separators, and are used to determine at least one position error signal. The servo sector format further includes magnetically written gray code positioned after the second servo timing mark. The patterned gray code is used in addressing the tracks located on the surface of a disk when the magnetically written gray code is self-written.
Claims27
A servo sector format for a patterned magnetic media comprising:
- a first patterned servo timing mark;
- a plurality of patterned PES burst separators adjacent to the first patterned servo timing mark, wherein the plurality of patterned PES burst separators are comprised of areas where no data is written;
- a plurality of servo burst fields written magnetically between the patterned separators, wherein the plurality of servo burst fields are used to determine at least one position error signal;
- and
- a second patterned servo timing mark adjacent to the plurality of patterned PES burst separators.
A servo sector format for a patterned magnetic media comprising:
- a first patterned servo timing mark;
- a plurality of patterned PES burst separators adjacent to the first patterned servo timing mark, wherein the plurality of patterned PES burst separators are comprised of areas where no data is written;
- a plurality of servo burst fields written magnetically between the patterned separators, wherein the plurality of servo burst fields are used to determine at least one position error signal;
- a patterned gray code between the first patterned servo timing mark and the plurality of patterned PES burst separators, wherein the patterned gray code is used to group a plurality of tracks into groups that are a power of two in number, whereby binary addressing can be used to address the plurality of tracks;
- and
- a second patterned servo timing mark adjacent to the plurality of patterned PES burst separators.
A method for fabricating a servo sector for patterned magnetic media comprising the steps of:
- patterning a first servo timing mark on the surface of the media;
- patterning a plurality of PES burst separators adjacent to the first servo timing mark, wherein the PES burst separators are comprised of areas where no data is written;
- writing magnetically a plurality of servo burst fields between the plurality of PES burst separators, wherein the plurality of servo burst fields are used to determine at least one position error signal;
- and
- patterning a second servo timing mark adjacent to the plurality of servo burst fields.
A method for fabricating a servo sector for patterned magnetic media comprising the steps of:
- patterning a first servo timing mark on the surface of the media;
- patterning a plurality of PES burst separators adjacent to the first servo timing mark, wherein the PES burst separators are comprised of areas where no data is written;
- writing magnetically a plurality of servo burst fields between the plurality of PES burst separators, wherein the plurality of servo burst fields are used to determine at least one position error signal;
- and
- patterning a second servo timing mark adjacent to the plurality of servo burst fields.
A disk drive storage system comprised of at least one read/write head positioned on the disk drive for reading from and writing to tracks on the disk, comprising:
- at least one disk drive surface in the disk drive storage system, wherein the disk drive surface is divided electronically into data wedges and patterned servo sectors, wherein the patterned servo sectors are comprised of a first patterned servo timing mark and a plurality of patterned PES burst separators;
- means for writing magnetically a plurality of servo burst fields between the plurality of patterned PES burst separators, wherein the plurality of servo burst fields are used to determine at least one position error signal;
- and
- a second patterned servo timing mark on the at least one disk drive surface, wherein the second patterned servo timing mark is patterned adjacent to the plurality of PES burst separators.
A disk drive storage system comprised of at least one read/write head positioned on the disk drive for reading from and writing to tracks on the disk, comprising:
- at least one disk drive surface in the disk drive storage system, wherein the disk drive surface is divided electronically into data wedges and patterned servo sectors, wherein the patterned servo sectors are comprised of a first patterned servo timing mark and a plurality of patterned PES burst separators;
- means for writing magnetically a plurality of servo burst fields between the plurality of patterned PES burst separators, wherein the plurality of servo burst fields are used to determine at least one position error signal;
- a patterned gray code on the at least one disk drive surface, wherein the patterned gray code is patterned between the first patterned servo timing mark and the plurality of PES burst separators;
- and
- a second patterned servo timing mark on the at least one disk drive surface, wherein the second patterned servo timing mark is patterned adjacent to the plurality of PES burst separators.
Dependencies are inferred from the claim text.