DATA DUPLICATION RESYNCHRONISATION

摘要

There is provided a method of resynchronising a previous duplication, started at a first time, of a source logical drive on a destination logical drive. The method comprises tracking changes to the data on said source logical drive since said first time and starting a resynchronisation operation at a second time later than said first time. The resynchronisation operation comprises copying data from said source logical drive to said destination logical drive by copying only data which has changed since said first time. By providing such a method, the need to copy data which has not changed since the previous duplication operation is alleviated. This reduces the time and processing required to perform the resynchronisation operation by eliminating unnecessary transfer of data which has not changed since the earlier duplication.