Patent ID: 8468180
Filing Date: 2013-06-18
Classification: G06F

Abstract:
1. A method of migrating data from an old storage device to a new storage device, comprising: creating new paths to the new storage device, wherein the new paths are created in a frozen state that prevents input/output (I/O) operations being performed using the new paths; freezing old paths to the old storage device, wherein freezing the old paths prevents performing new I/O operations using the old paths while allowing performing of prior I/O operations using the old paths, the prior I/O operations being initiated prior to the freezing of the old paths; transferring metadata corresponding to the old storage device to the new storage device, wherein path state information is transferred from the old storage device to the new storage device; after performing the prior I/O operations using the old paths, dismantling the old paths, wherein the old paths, being previously frozen, are eliminated; and after transferring the metadata, thawing the new paths, wherein thawing the new paths allows performing of I/O operations using the new paths.