Patent ID: 7310743

Claim:
A method for facilitating a data recovery to a first data store from a second data store in a data processing system wherein changes to the data in the first data store are recorded and wherein the second data store is operable in a first mode as a mirror to the first data store wherein a protected data recovery allows the first data store to be restored without changing the data in the second data store characterized by: A) setting the second data store to a read-only mode thereby disabling the transfer of data to locations in the second data store, B) restoring the first data store by copying data from the second data store to the first data store with the second data store in the read-only mode, C) updating the first data store by writing data from the record of updates to the first data store while the second data store remains in the read-only mode, D) recording the changes to the first data store during said updating, E) changing the second data store to a read-write mode, and F) transferring data from the first data store to the second data store to bring the second data store into synchronism with the data in the first data store.