Data storage array

G - Physics – 06 – F

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G06F 17/30 (2006.01)

Patent

CA 2532997

The error tolerance of an array of m storage units is increased by using a technique referred to as ~dodging." A plurality of k stripes are stored across the array of storage units in which each stripe has n + r elements that correspond to a symmetric code having a minimum Hamming distance d = r + 1. Each respective element of a stripe is stored on a different storage unit. An element is selected when a difference between a minimum distance of the donor stripe and a minimum distance of a recipient stripe is greater or equal to 2. The selected element is also stored on a storage unit having no elements of the recipient stripe. A lost element of the recipient stripe is then rebuilt on the selected element.

On augmente la tolérance aux erreurs d'une matrice de m unités de mémoire en utilisant une technique appelée dodging." A cet effet, un groupe de k bandes sont mémorisées dans la matrice des unités de mémoire, chaque bande contenant n + r éléments qui correspondent à un code symétrique ayant une distance de Hamming minimum d = r + 1. Chaque élément respectif d'une bande est mémorisé sur une unité de mémoire différente. On sélectionne un élément lorsqu'une différence entre une distance minimum de la bande donneuse et une distance minimum d'une bande receveuse est supérieure ou égale à 2. L'élément sélectionné est également mémorisé sur une unité de mémoire n'ayant pas d'éléments de la bande receveuse. Un élément perdu de la bande receveuse est ensuite reconstitué sur l'élément sélectionné.

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