Patent ID: 6393537
Filing Date: 2002-05-21
Classification: G06F

Abstract:
A method for transferring data between a first and second storage devices, comprising:processing a data transfer request with a host system to transfer data from the first storage device to the second storage device; allocating, with the host system, source and target locations, wherein data is transferred from the source location in the first storage device to the target location in the second storage device; maintaining, with the host system, serialization of the source location; defining, with the host system, a data transfer request to include information on the source and target locations and data sets to transfer therebetween; defining with the host system data movement paths from the first storage device to a first controller, from the first controller to a second controller, and from the second controller to the second storage device. communicating, with the host system, the data transfer request, including the information on the data sets to transfer and the data movement paths to the first controller; processing, with the first controller, the information on the data sets to transfer; and transferring, with the first controller, the data sets from the source location in the first storage device to the second controller, wherein the second controller transfers the data sets to the target location in the second storage device, and wherein the data movement paths between the first and second controllers through which the data sets are transferred do not pass through the host system.