You can use the SETOAM OAMSCRATCHSYNCH statement to specify how OAM is to react to blank DATACLAS and OUNITNAM fields in the DB2 TAPEVOL table that are associated with a tape volume that is being returned to OAM scratch status. In installations where the original unit name of the tape is not changed because the tape is mounted in an IBM automated tape library, you can enable the SETOAM OAMSCRATCHSYNCH statement to fill in the data class and unit name for the tape volume. Thus, these tape volumes are eligible to be reused.

If the DATACLAS field is blank, OAM sets DATACLAS to the same value as the data class that was associated with the storage group for the volume before it was returned to OAM scratch. If the OUNITNAM field is blank and the value in UNITNAME is a generic device, OUNITNAM and UNITNAME are both set to the same value as the UNITNAME for the storage group. If OUNITNAM is blank and the value in UNITNAME is an esoteric device name, both OUNITNAM and UNITNAME remain unchanged.

Restriction: This option cannot be used if your object tape volumes reside inside an IBM automated tape library.