Patent Number: 6,253,295

Title: System and method for enabling pair-pair remote copy storage volumes to mirror data in another pair of storage volumes

Abstract: A data storage system including first, second, third and fourth virtual storage volumes, the first and second virtual storage volumes controlled to enable a mirroring and synchronization of data therebetween. The data storage system further includes a first processor that is responsive to a "copy pair" command or its equivalent to copy a directory from the first virtual storage volume to a directory of the third virtual storage volume. The first processor also dispatches a copy command, or its equivalent, to copy the directory of the second virtual storage volume to the directory of the fourth storage volume. A second processor is responsive to the copy command to cause a copying of the directory of the second virtual storage volume to the directory of the fourth virtual storage volume. Thus, the third and fourth virtual storage volumes are controlled to include directories which duplicate directories of the first and second virtual storage volumes.

Inventors: Beal; David Grant (Longmont, CO), Milillo; Michael Steven (Louisville, CO), West; Christopher James (Boulder, CO)

Assignee: International Business Machines Corporation

International Classification: G06F 11/20 (20060101); G06F 012/00 ()

Expiration Date: 06/26/2018