When the source and target devices are of equal capacity, you can use logical or physical copy processing. If you use logical processing, the source VTOC is not copied to the target device. In this case, use ICKDSF to initialize the target device with an appropriately sized VTOC, then perform the logical data set copy operation.

If you use physical processing, the source VTOC is copied to the target device and DFSMSdss might invoke ICKDSF to rebuild the VTOC index (if present on the source and target devices). If you determine that the source VTOC is not large enough for the target device, use ICKDSF to initialize the target device with an appropriately sized VTOC, use logical data set copy to move the volume.