exemplary embodiments of the present invention disclose a method and system for substituting a group of memory cells for a defective group of memory cells in a memory . in a step , an exemplary embodiment replaces a signal path to a group of defective memory cells with a signal path to a redundant group of memory cells . in another step , an exemplary embodiment isolates the signal path to the redundant group of memory cells from a load imposed by the signal path to the replaced group of defective memory cells .