/For=ForVolumeSpec /On=OnVolumeSpec /Quiet - Deletes an existing shadow copy storage association between ForVolumeSpec and ...

%1 %2 /For=ForVolumeSpec [/On=OnVolumeSpec] [/Quiet]     - Deletes an existing shadow copy storage association between      ForVolumeSpec and OnVolumeSpec.  If no /On option is given, all shadow      copy storage associations will be deleted for the given ForVolumeSpec.       Example Usage:  vssadmin Delete ShadowStorage /For=C: /On=D: