SHA or SHADOW is used by the system manager to control shadow recording. The general format for a SHADOW command is: >SHA keyword parameter-list Available keywords: ABORT - stops shadow recording of a shadowed pair while catch-up is in progress. CONTINUE - restarts shadow recording on a previously shadowed pair. DISPLAY - displays all shadowed disk pairs. START - starts shadow recording and initiates a catch-up on the specified disk pair. STOP - stops shadow recording of a disk pair. The format of each command: ABORT ddnn: CONTINUE ddnn: TO ddxx: DISPLAY START ddnn: TO ddxx: STOP ddnn: where: ddnn: = primary device ddxx: = secondary device The secondary volume must be mounted foreign.