How EDGUTIL performs VERIFY and MEND processing for volumes

The EDGUTIL utility performs this processing:

For 3-way audit processing:
- All TCDB volume entries are retrieved from all connected volume catalogs and compared with DFSMSrmm volume information. TCDB volumes not defined to DFSMSrmm are reported unless excluded from processing by SYSIN.
- Any DFSMSrmm-defined volume, unless excluded from processing by volume or location, known from the TCDB or DFSMSrmm control data set to be in a system managed library, is checked against library manager data.
- EDGUTIL does not retrieve volumes from the library manager unless information is needed for a volume known to the TCDB or to DFSMSrmm.
For 3-way audit, VOLCAT, and VOL processing:
- Each DFSMSrmm-defined volume is processed only if selected for processing by default or by LOCATIONS, VOLUMES or VOLUMERANGES, and is not excluded.
For VOL processing:
- When you select a subset of DFSMSrmm-defined volumes to be processed using one of these: VERIFY, VERIFY with ALL/VOL, MEND, or MEND with ALL/VOL:
  - Processing includes the previous and next volume regardless of whether the previous and next volumes are selected to be verified.
  - Processing excludes ensuring that stacked volume information is consistent.