Method and system for error checking in a bit-patterned media

Details Method and system for error checking in a bit-patterned media Method and system for error checking in a bit-patterned media

2007-06-29

2010-11-16

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

C360S031000, C369S030210

Reexamination Certificate

active

07835099

ABSTRACT:
A disc drive system provides increased reliability by detecting and correcting errors associated with bit-patterned media. Write synchronization errors associated with bit-patterned media are addressed by including data storage for temporarily storing data that is being written to the disc drive. The data is read from both the disc drive and the storage medium and compared to detect write synchronization errors. A disc drive system for correcting write synchronization errors includes an encoder, non-volatile storage, and decoder device for implementing a parity-based scheme for increased reliability. Data strings being written to the disc drive are combined in an encoder to generate a parity string. The address of the data being written to the disc drive, along with the updated parity string is stored to the non-volatile storage. The data strings are read from the disc drive by the decoder. If uncorrectable errors are identified, the decoder employs the parity string in conjunction with the other data strings written to the disc drive to reconstruct the data string with uncorrectable errors.

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