Track identification codewords having multiple bit error correction capability and generalized gray code property
AssigneeWestern Digital Technologies, Inc.
InventorsJai N. Subrahmanyam, Jack M. Chue
Life of this patent
Estimating the term…
Abstract
The present invention may be embodied in a disk drive comprising a rotating magnetic media having tracks identified by binary codewords, and in a related method. Each track codeword for a particular track within a contiguous band of tracks differs from a track codeword for an adjacent track within the contiguous band of tracks by a defined number of bits, and differs from a track codeword for a nonadjacent track within the contiguous band of tracks by at least the defined number of bits. The defined number N of bits is greater than four such that at least two bit errors may be corrected when reading a track codeword.
Claims12
A disk drive comprising a rotating magnetic media having tracks identified by binary codewords, wherein each track codeword for a particular track within a contiguous band of tracks differs from a track codeword for an adjacent track within the contiguous band of tracks by a defined number N of bits, and differs from a track codeword for any nonadjacent track within the contiguous band of tracks by at least the defined number N of bits, wherein the defined number N of bits is greater than four such that at least two bit errors can be corrected when reading a track codeword.
A method for identifying tracks on a rotating magnetic media of a disk drive, comprising assigning each track within a contiguous band of tracks with a unique binary codeword such that each track codeword for a particular track within the contiguous band of tracks differs from a track codeword for an adjacent track within the contiguous band of tracks by a defined number N of bits, and differs from a track codeword for any nonadjacent track within the contiguous band of tracks by at least the defined number N of bits, wherein the defined number N of bits is greater than four such that at least two bit errors can be corrected when reading a track codeword.
Dependencies are inferred from the claim text.