Physical data backup with FDDRL

In the case of physical data backup with FDDRL (see the "FDDRL" manual [11 (Related publications)]), whole data media are saved (individual disks or entire pubsets (home pubset, exported pubset, split disk mirror). Here all the data on a data medium, including the data labels, is written block by block in the physical order without catalog access to MTC.

FDDRL (DUMP function) by default transfers only the areas marked as occupied in the F5 label. As a rule, therefore, in a physical backup with FDDRL no more data is transferred than in a logical backup with HSMS. In the case of physical backups, however, neither incremental backups can be created nor can individual files be restored.