Oracle ASM and Recovery Appliance Storage
Recovery Appliance storage locations occupy space in Oracle ASM disk groups. By default, the delta pool is stored in normal redundancy Oracle ASM disk groups, which means that the Recovery Appliance maintains two copies of all on-disk backups. Database backups can survive the loss of any one disk or storage server. The Recovery Appliance metadata database, which tracks the files and blocks, is stored in a high redundancy Oracle ASM disk group.