Patent ID: 8255596
Filing Date: 2012-08-28
Classification: G06F

Abstract:
1. A method for migrating existing data from a source storage controller to a target storage controller, each associated with a first host device, using a processor device in communication with a memory device, comprising: configuring the target storage controller with at least one target volume comprising pass-through support to a source volume of the source storage controller; configuring a first portion of a first input/output (I/O) path from the existing data in the source storage controller to the at least one target volume; configuring a second portion of the first I/O path from the first host device to the existing data in the source storage controller; temporarily adding, via an operating system (OS) operational on the first host device, a second I/O path connecting the first host device and the source storage controller, wherein temporarily adding includes setting at least one multipath weight to give preference to the first I/O path, and utilizing a load balancing algorithm to determine whether the first I/O path exhibits a better performance than the second I/O path for implementing a greater or smaller amount of data transfer along the first I/O path or the second I/O path; migrating data from the source volume to the at least one target volume; and upon completion of migrating the data, removing the second I/O path, wherein: