With DFSMSrmm you can define conditions such as where volumes should reside, ranges of shelf locations that should not be used, and volumes that can only be used on certain systems. If you are running DFSMSrmm in protect mode, the volume is rejected under these conditions:

• The volume mounted for a scratch request has not been defined to DFSMSrmm.
• The volume mounted for a scratch request is not in a scratch pool associated with this system or does not match installation-defined requirements.
• The volume mounted for a scratch request is from a scratch pool associated with another system.
• The volume is not to be used on z/OS systems.
• A user asks for the use of a volume to be ignored, but is not authorized to do so for that volume.
• A volume in an automated tape library is not defined to DFSMSrmm and cannot be defined to DFSMSrmm for some reason.
• You have defined OPENRULE commands in parmlib member EDGRMMxx, and:
  • An OPENRULE command with the unqualified REJECT action is defined for a set of volumes, preventing a volume from being used on a particular system.
  • An OPENRULE command with the REJECT action qualified by SYSID or CATLG is defined for a set of volumes, preventing a volume from being used when the qualified condition is not met.
  • An OPENRULE command with the IGNORE action is defined for a set of volumes, asking for the use of a volume to be ignored, but the user is not authorized to do so for that volume.
• You have defined REJECT commands in parmlib member EDGRMMxx, and:
  • You have defined a REJECT command for a range of shelf locations or volumes, preventing a volume from being used on a particular system.
  • The volume is not defined to DFSMSrmm and a REJECT command requests that all non-defined volumes are to be rejected.