1- Does Oracle RMAN support Incremental Update/Merge option for device type SBT ? Or its only supported for Disk ?
2 – During an update/merge operation during the incremental backup, does RMAN write directly into the image copy by updating the changed blocks ?
Thanks in advance
Best Answer
1: Incremental image copy update is only supported on disk
2: Updating the image copy is done using a differential backupset. So you need the diff before you can update the image copy. A good description of the process is in the Oracle docs
For both answers, see the RMAN Backup and Recovery User's Guide: http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmbckba.htm#BRADV8186
Table 9-2 explains the process in detail.