Patent ID: 8468517
Filing Date: 2013-06-18
Classification: G06F

Abstract:
1. A method for replacing an entirety of an existing storage subsystem with an upgraded storage system, and pursuant to the replacing, at least one upgraded component of a plurality of upgraded components making up the upgrade storage system is connected to at least one existing component of a plurality of existing components making up the existing storage system, the method comprising: creating support for a verify I/O command to be operable on the upgraded storage subsystem; creating a target volume in the upgraded storage subsystem having a same volume identification as a source volume in the existing storage subsystem; configuring a network port to have a same identification as a source port in the existing storage subsystem; and for a command received on the at least one of the plurality of upgraded components, invoking the verify I/O command on at least one of a comparable one of the plurality of existing components to verify the command, wherein if the command is verified, driving the command;