1. A machine readable storage device comprising at least one of a magnetic storage device and an electronic memory device having machine-readable instructions executed by a server, in communication with a plurality of clients, a first storage device, and a second storage device, to perform operations, the operations comprising: providing data storage services for the clients for backup of data objects from the clients; sending a data object to a first location in the first storage device; determining if the data object was successfully stored at the first location, and if so, storing meta data corresponding with the data object, wherein the meta data includes first path information on a first data path of the data object from a source location to the first location, wherein the first path information indicates at least one device in the first data path between the source location and the first location; migrating the data object from the first location to a second location in the second storage device; and determining if the data object was successfully stored at the second location, and if so, adding second path information on a second data path of the data object from the first location to the second location to the meta data corresponding with the data object, to update the meta data, wherein the second path information indicates at least one device in the second data path between the first location and the second location.