DFSMSrmm uses this procedure to determine whether to use the RMM or NORMM entity name:

1. If a VOL1 label exists for the mounted tape, DFSMSrmm uses it to determine whether the label type is AL, NL, or SL. If the label type cannot be determined, the label type is assumed to be NL.
2. If the volser is not defined to DFSMSrmm, it is handled as NORMM.
3. If the mounted and DFSMSrmm recorded label types do not match, it is handled as NORMM.
4. If the label types match and are NL, it is handled as RMM.
5. If the label types match and are AL or SL, and the HDR1 data set name information matches the data set name recorded for the volume, it is handled as RMM.
6. If none of the previous cases are true, it is handled as NORMM.

DFSMSrmm uses STGADMIN.EDG.IGNORE.TAPE.RMM.volser only for volumes that are to be handled as RMM. .

DFSMSrmm uses STGADMIN.EDG.IGNORE.TAPE.NORMM.volser only for volumes that are to be handled as NORMM.

The third entity name, STGADMIN.EDG.IGNORE.TAPE.volser, is used only when the first SAF authorization check for either RMM/NORMM determines that the resource is not protected.

For example, if you want DFSMSrmm to ignore volume A00001 that is defined to DFSMSrmm, you could define the STGADMIN.EDG.IGNORE.TAPE.*.* UAC(NONE) profile, which protects both STGADMIN.EDG.IGNORE.TAPE.RMM.volser and STGADMIN.EDG.IGNORE.TAPE.NORMM.volser resources. When DFSMSrmm calls SAF to check the authorization using the entity name STGADMIN.EDG.IGNORE.TAPE.RMM.A00001, it will be authorized or not based on the access list you set up for the STGADMIN.EDG.IGNORE.TAPE.*.* profile.

When DFSMSrmm ignores a volume as requested by the EDG_EXIT100 installation exit and the user is authorized to ignore processing, this overrides any decision taken by RACF as a result of authorization checks issued by OPEN processing. You can tailor the EDGUX100 exit module to prevent DFSMSrmm from overriding the decision in the case of SAF return code 8 (not authorized).