Patent ID: 7805520
Filing Date: 2010-09-28
Classification: G06F,H04L

Abstract:
1. A method comprising, in order: transmitting a first login request by a host device to a migration source storage device for the host device to login to the migration source storage device; in response to the migration source storage device receiving the first login request from the host device, transmitting a first login response by the migration source storage device to the host device indicating that the host device has been successfully logged into the migration source storage device to access data stored on the migration source storage device; after the host device receives the first login response from the migration source storage device, transmitting a request by the host device to the migration source storage device to migrate the data from the migration source storage device to a migration destination storage device; in response to the migration source storage device receiving the request from the host device for the migration source storage device to migrate data from the migration source storage device to a migration destination storage device, after the host device receives the response from the migration source storage device requesting that the host device logout from the migration source storage device, transmitting a second login request by the host device to the migration source storage device for the host device to login to the migration source storage device; in response to the migration source storage device receiving the second login request from the host device, transmitting a second login response by the migration source storage device to the host device indicating that the second login request has been refused and that the data has been migrated from the migration source storage device to the migration destination storage device; after the host device receives the second login response from the migration source storage device, transmitting a third login request to the migration destination storage device; and, in response to the migration destination storage device receiving the third login request from the host device, transmitting a third login response by the migration destination storage device to the host device indicating that the host device has been successfully logged into the migration destination storage device to access the data migrated from the migration source storage device to the migration destination storage device; after the host device receives the response from the migration source storage device requesting that the host device logout from the migration source storage device, and before the host device transmits the second login request to the migration source storage device, sending a first logout request by the host device to the migration source storage device for the host device to logout of the migration source storage device; in response to the migration source storage device receiving the first logout request from the host device, transmitting a first logout response by the migration source storage device to the host device indicating that the host device has been successfully logged out of the migration source storage device; after the host device receives the second login response from the migration source storage device indicating that the second login request has been refused, and before the host device transmits the third login request to the migration destination storage device, sending a second logout request by the host device to the migration source storage device; in response to the migration source storage device receiving the second logout request from the host device, transmitting a second logout response by the migration source storage device to the host device.