Patent ID: 6742138
Filing Date: 2004-05-25
Classification: G06F

Abstract:
A method for facilitating a data recovery that copies data to a first data store from a second data store that is operable in a first mode as a mirror to the first data store and that is operable in a second mode in isolation from the first data store, said data recovery operation comprising the steps of:A) disabling the transfer of data to locations in the second data store, B) identifying the locations in the first data store to receive data from the second data store in response to the command, C) performing a restoration procedure that copies data to the identified locations in the first data store from corresponding identified locations in the second data store, D) performing an updating procedure that updates data on the first data store based upon changes to data in the first data store recorded after the second data store shifts to its second operating mode, and E) enabling the transfer of data to locations in the second data store upon completion of the restoration and updating procedures whereby the data in the second data store remains unchanged throughout the data recovery operation.