Patent ID: 6557079
Filing Date: 2003-04-29
Classification: G06F

Abstract:
A method for performing a prefetch operation on data being maintained by a data storage system and a remote data storage system arranged in a mirrored configuration and interconnected by a data link, comprising:initiating a local prefetch operation directed to data on a local mirrored copy of the data storage system; sending a read command to the remote data storage system over the data link, the read command causing the remote data storage system to provide other data prefetched from a remote mirrored copy of the remote data storage system to the data storage system over the data link; and wherein the local prefetch operation begins at a first address of a first track number in a range of consecutive prefetch addresses and the read command is directed to a second address of a second track number in the range of consecutive prefetch addresses, the second track number being offset from the first track number by a programmable track offset value.