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US 7,612,959 B2Granted
Method for correcting added and lost bits in a hard disk drive using error correction codes
AssigneeSamsung Electronics Co., Ltd.
InventorsYawshing Tang, Carl Xiaodong Che
Life of this patent
Estimating the term…
Abstract
A hard disk drive with an encoder that writes data onto a disk in accordance with a plurality of first codes. Each code contains a plurality of digital bits. The first codes are selected so that if a bit is added or dropped during a write or read process the resulting bitstream can only be one of the selected first codes. This allows the bitstream to be accurately decoded to detect and correct for the added/dropped bit.
Claims11
A hard disk drive, comprising:
- a disk;
- a spindle motor that rotates said disk;
- a head coupled to said disk;
- and,
- a circuit that encodes a series of bits into a plurality of first codes and writes said first codes onto said disk, said first codes having a sequence so that when one of a plurality of second codes is read back from said disk and includes an extra bit, said second code can only be one of said first codes, said first codes are derived by listing a plurality of possible codes that may be associated with said second codes, selecting a first code and then deselecting each possible code that can be associated with said first and second codes.
2 more elements
A hard disk drive, comprising:
- a disk;
- a spindle motor that rotates said disk;
- a head coupled to said disk;
- and,
- circuit means for encoding a series of bits into a plurality of first codes and writing said first codes onto said disk, said first codes having a sequence so that when one of a plurality of second codes is read back from said disk and includes an extra bit, said second code can only be one of said first codes, said first codes are derived by listing a plurality of possible codes that may be associated with said second codes, selecting a first code and then deselecting each possible code that can be associated with said first and second codes.
2 more elements
A method for controlling a read/write operation of a hard disk drive, comprising:
- encoding a series of bits into a plurality of first codes;
- writing the first codes onto a disk;
- and,
- reading the first codes from the disk, the first codes having a sequence so that when one of a plurality of second codes is read back from the disk and includes an extra bit, the second code can only be one of the first codes, the first codes are derived by listing a plurality of possible codes that may be associated with the second codes, selecting a first code and then deselecting each possible code that can be associated with the first code.
1 more element
Dependencies are inferred from the claim text.