Erasure correction using single error detection parity

摘要

A method includes receiving a representation of a set of single error detection (SED) parity bits and a representation of data. The data includes an error correction coding (ECC) codeword including information bits and ECC parity bits. Each SED parity bit of the set of SED parity bits indicates a parity value for a corresponding portion of the data. The method includes, in response to determining that a particular portion of the representation of the data includes a single erasure bit, selectively modifying a bit value of the single erasure bit based on the representation of the SED parity bit that corresponds to the particular portion and generating an updated representation of the ECC codeword when the bit value of the single erasure bit corresponds to the ECC codeword and has been modified. The method may include initiating an ECC decode operation of the updated representation of the ECC codeword.

主权项

1. A method comprising:
in a data storage device, performing:
receiving a representation of a set of single error detection (SED) parity bits and a representation of data, the data including an error correction coding (ECC) codeword including information bits and ECC parity bits, wherein each SED parity bit of the set of SED parity bits indicates a parity value for a corresponding portion of the data;in response to determining that a particular portion of the representation of the data includes a single erasure bit, selectively modifying a bit value of the single erasure bit based on the representation of the SED parity bit that corresponds to the particular portion and generating an updated representation of the ECC codeword when the bit value of the single erasure bit corresponds to the ECC codeword and has been modified; andinitiating an ECC decode operation of the updated representation of the ECC codeword.