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Transformation of data from one layout to another involves rearrangement of data in the existing layout to the new layout. During the transformation, online relayout retains data redundancy by mirroring any temporary space used. Read and write access to data is not interrupted during the transformation.
Data is not corrupted if the system fails during a transformation. The transformation continues after the system is restored and both read and write access are maintained.
You can reverse the layout transformation process at any time, but the data may not be returned to the exact previous storage location. Any existing transformation in the volume must be stopped before doing a reversal.
You can determine the transformation direction by using the vxrelayout status volume command.
These transformations are protected against I/O failures if there is sufficient redundancy and space to move the data.