Patent ID: 6922761

Claim:
A method of migrating data from at least one original host storage system to a replacement host storage system on a network, comprising: connecting a replacement host storage system to a network, and connecting an original host storage system to the replacement host storage system; migrating data from the original host storage system to the replacement host storage system; receiving at the replacement host storage system at least one request from a client on the network concerning data stored in at least one of the replacement host storage system and the original host storage system; determining if the data requested has been migrated from the original host storage system to the replacement host storage system; and if the data requested has been migrated, acting on the client request, and if the data has not been migrated, searching for the data on the original host storage system, copying the data to the replacement host storage system and acting on the client request. determining whether additional files or directory data to be migrated exist on the original host storage system; and if there are no additional files or directory data existing which require migration, terminating data migration.