Patent ID: 6735637
Filing Date: 2004-05-11
Classification: G06F

Abstract:
A method for improving the performance of a mirror split operation by a data storage device controller, the method comprising:providing a split advance warning interface for receiving a split advance warning; upon receiving a split advance warning, determining a mirror-I/O-request-processing-to-local-I/O-request-processing-rate ratio in order to process backlogged mirror I/O requests prior to receiving a corresponding mirror split operation request; and processing mirror I/O requests and local I/O requests according to the mirror-I/O-request-processing-to-local-I/O-request-processing-rate ratio until an expected time of occurrence of the corresponding mirror split operation, periodically re-determining the mirror-I/O-request-processing-to-local-I/O-request-processing-rate ratio according to currently backlogged mirror I/O requests.