Which parameters should the backup copygroup have, to keep only the last backup copy of data indefinitely after the file has been deleted from the file system and a daily incremental backup has been completed?

Which two steps should be performed by an administrator of IBM Tivoli Storage Manager to make sure they have intact database backup volumes information and device definitions available? (Choose two.)

During a recovery situation for IBM Tivoli Storage Manager (Tivoli Storage Manager) database, which file is required by Tivoli Storage Manager in order to read the latest database backup volume information?