Patent ID: 7320058
Filing Date: 2008-01-15
Classification: G06F,Y10S

Abstract:
1. A method of installing a new storage device to a system having a host computer, a primary storage device coupled to the host computer via a first host connection, and a secondary storage device coupled to the primary storage device via a first remote copy connection, the system configured to write data from the primary storage device to the secondary storage device using the first remote copy connection, the method comprising: coupling the new storage device to the primary storage device via a storage connection; coupling the new storage device to the host computer via a new host connection; removing the first host connection between the host computer and the primary storage device; receiving remote copy configuration information at the new storage device; if the host computer issues a write request to the new storage device during the receiving step, writing data associated with the write request to the new storage device and to the primary storage device; removing the first remote copy connection between the primary storage device and the second storage device; coupling the new storage device to the second storage device via a new remote copy connection; and using the new remote copy connection to remote copy write data from the new storage device to the secondary storage device based on the remote copy configuration information; wherein data accompanied with the write request are maintained as pending data in the new storage device while the remote copy function is disrupted.