To do this, you have to specify the directories (on the different disks) to which you want to save your database files in the init<DBSID>.sap profile parameter backup_root_dir .

• Device type:
  backup_dev_type = disk
• Backup directories:
  backup_root_dir = (/backup/dir1, /backup/dir2)
• Compression parameters:
  compress = no|yes

BRBACKUP normally uses all the directories specified in backup_root_dir in parallel (the number of copy processes corresponds to the number of disks) in order to make a backup of the database files. Since BRBACKUP attempts to optimize the speed of the backup, all the hard disks specified in backup_root_dir are written to (except if the number of files you want to back up is smaller than the number of disks). This setting can be changed with the init<DBSID>.sap parameter exec_parallel or the command option -e|-execute .

Operating system utilities can then be used to copy a disk backup to tape.