To initialize and erase volumes without operator intervention, you can set up automatic processing by specifying any of these EDGINERS EXEC parameters: COUNT, INITIALIZE, ERASE, LOCATION, MEDIANAME, MEDIATYPE, POOL, or RECORDINGFORMAT. When you request automatic processing, DFSMSrmm does not process any SYSIN commands you specify.

During DFSMSrmm expiration processing, DFSMSrmm records the volumes that need to be initialized or erased when they are released or returned to scratch. If you use the EXEC parameters in your JCL to set up automatic processing, DFSMSrmm initializes or erases these volumes without operator intervention. EDGINERS issues write-to-operator messages and MSGDISP requests to the operator and the drive to get a volume mounted and demounted. If operators are unable to mount a volume, DFSMSrmm allows them to skip processing the current requested volume.

To initialize scratch volumes in a non-system-managed library that you are adding to DFSMSrmm, use the RMM ADDVOLUME subcommand with the INIT(Y) operand to mark the volumes you want initialized before they are available as scratch. Specify the INITIALIZE EXEC parameter in your EDGINERS JCL. DFSMSrmm initializes all the volumes marked as requiring initialization. See Initializing scratch volumes in system-managed libraries for information on initialization for volumes in a system-managed library.