Data integrity verification mechanism

G - Physics – 06 – F

Patent

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G06F 11/10 (2006.01) G11B 20/18 (2006.01)

Patent

CA 2424988

A method and apparatus is provided for maintaining data integrity. According to the method, a physical checksum calculation is performed on a block of data. After performing the physical checksum calculation, a logical check is performed on the data contained with the block of data. If the block of data passes the logical check, then the block of data may be written to nonvolatile memory. Thereafter, when the block of data is read from nonvolatile memory a physical checksum verification procedure is performed on the block of data to determine whether the block of data was corrupted after performing the logical check on the data contained with the block of data.

L'invention concerne un procédé et un appareil permettant d'assurer l'intégrité des données. Selon le procédé, un calcul physique de somme de contrôle est effectué sur un bloc de données. Une fois le calcul effectué, un vérification logique est effectuée sur les données contenue dans le bloc de données. Si le bloc de données passe la vérification logique, il peut être inscrit dans une mémoire non volatile. Ensuite, lorsque le bloc de données est lu de la mémoire non volatile, une procédure de vérification physique de somme de contrôle est effectuée sur le bloc de données afin de déterminer s'il a été corrompu après la vérification logique sur les données contenues dans le bloc de données.

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