Patent ID: 7293140
Filing Date: 2007-11-06
Classification: G06F,Y10S

Abstract:
1. A data migration method comprising: providing a virtualization system coupled to a first storage subsystem and a second storage subsystem that store data written by a host device, each of the first and second storage subsystems presenting storage volumes configured with a plurality of physical storages as an actual storage resource to the virtualization system, the virtualization system presenting virtual volumes as a virtual storage resource to the host device; classifying the virtual volumes into a first class and a second class according to a predetermined criteria; mapping a first storage volume and a second storage volume to a first virtual volume classified as the first class, so as to present the first and second storage volumes via the first virtual volume to the host device, each of the first and second storage volumes being configured with a plurality of the physical storages in the first storage subsystem; gathering activity information relating to I/O (input/output) activity and presenting the activity information in connection with the first virtual volume to a user; based upon the user's request to migrate data stored in the first and second storage volumes by designating the first virtual volume and the second class, migrating data stored in the first and second storage volumes to third and fourth storage volumes, each of the third and fourth storage volumes being configured with a plurality of the physical storages in the second storage subsystem; and mapping the third and fourth storage volumes to a second virtual volume classified as the second class so as to present the third and fourth storage volumes via the second virtual volume to the host device.