With the 3592 Model J support for new media types (MEDIA6, MEDIA7, and MEDIA8), OAM includes an enhancement to optionally append a low-level qualifier to the OAM object tape data set names. To assist the tape management system in mounting an appropriate media type in the stand-alone environment (non system-managed tape environment), the DSNWITHSGNAME global keyword on the SETOAM statement in the CBROAMxx PARMLIB member appends the object storage group name to the OAM data set names (OAM.PRIMARY.DATA, OAM.BACKUP.DATA, OAM.BACKUP2.DATA). For example, if OAM receives a store request for an object for storage group GROUP55, GROUP55 is appended as the low-level qualifier to the OAM.PRIMARY.DATA data set name, resulting in OAM.PRIMARY.DATA.GROUP55.

The tape management system can parse the data set low-level qualifier (storage group) to determine from which pool a scratch volume should be selected for a mount request in the stand-alone environment. By associating object storage group names with tape management scratch pools, specific media type volumes can be assigned to specific pool names and segregated, preventing a WORM volume request from being used for a rewritable volume request and vice versa.

Though discussion of the new DSNWITHSGNAME global keyword has centered around the stand-alone (non-system managed tape environment) where scratch allocations are typically satisfied with the assignment of a tape management system scratch pool versus the assignment of an appropriate data class, this new keyword can also be specified in the system-managed tape library environment to better identify what object storage group data is written to the tape.

Once the DSNWITHSGNAME is specified, all new OAM object data set names for all storage groups will have the storage group name appended. Regardless if DSNWITHSGNAME is specified or not, data sets written in the original data set name format or the new data set name format can be retrieved.

The MODIFY OAM, DISPLAY, and SETOAM command displays indicate if the GLOBAL DSNWITHSGNAME keyword is specified on the SETOAM statement in the CBROAMxx PARMLIB member.

Data set format column, DSNFMT, is added to the TAPEVOL table of the Optical Configuration Database. If a tape volume has a DSNFMT value of blank, the data set written on the volume is the original data set format with no storage group low-level qualifier or has no current OAM data set written on the tape. If a tape volume has a DSNFMT value of 'G' for group, the data set written on the volume has the storage group appended.

Sample JCL, CBRSMPDS, adds the DSNFMT column to the TAPEVOL table in the Optical Configuration Databse. Also, CBRSAMPL is modified to include the TAPEVOL DSNFMT column.