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US 8,947,809 B2Granted
Encoding scheme for bit patterned media
AssigneeSeagate Technology LLC
InventorsMustafa Can Ozturk, Puskal Prasad Pokharel
Life of this patent
Estimating the term…
Abstract
A bit patterned media (BPM) encoded recordable medium includes a servo control field including servo bits. Each servo bit is represented by a servo bit pattern of dots and gaps on the recordable medium. In the servo bit patterns, substantially no two dots are placed immediately next to one another, and substantially all servo bit patterns start with a gap and/or substantially all servo bit patterns end with a gap.
Claims23
A device, comprising:
- a servo control field comprising a plurality of servo bits, wherein each servo bit is represented by a servo bit pattern of dots and non-magnetic gaps on the device in which substantially no two dots are placed immediately next to one another, and wherein substantially all servo bit patterns start with a non-magnetic gap and/or substantially all servo bit patterns end with a non-magnetic gap.
A servo control system, comprising:
- a device comprising a servo control field including a plurality of servo bits, wherein each servo bit is represented by a servo bit pattern of dots and non-magnetic gaps on the device in which substantially no two dots are placed immediately next to one another, and wherein substantially all servo bit patterns start with a non-magnetic gap and/or substantially all servo bit patterns end with a non-magnetic gap;
- a transducer that detects the dots and gaps on the device and responsively generates a readback signal;
- and
- a servo controller that controls a position of the transducer in response to a readback signal from the transducer.
1 more element
A method of writing a servo control field on a device, comprising:
- writing a plurality of servo bits on the device, wherein each servo bit is represented by a servo bit pattern of dots and non-magnetic gaps on the device in which substantially no two dots are placed immediately next to one another, and wherein substantially all servo bit patterns start with a non-magnetic gap and/or substantially all servo bit patterns end with a non-magnetic gap.
Dependencies are inferred from the claim text.