With DFSMShsm as the data mover, data sets recovered with the GUARANTEED SPACE attribute are normally placed on the volume from which they were backed up. Consider the effects on a backed up, multiple-volume VSAM data set. A subsequent recover preserves the volume-to-component relationship that originally existed as long as the data set remains SMS-managed. For a data set in a GUARANTEED SPACE storage class, the relationship includes returning the data set to the same volumes from which it was backed up. Thus, if a data set has been originally defined with the data component on one volume and the index component on another, a backup and recover sequence preserves the relationship between the components and the volumes. Similarly, if a key range data set has three key ranges on three separate volumes, the relationship is preserved.