RMAN backup database_ Skip offline, read-only, and inaccessible files

By default , When a data file cannot be accessed ,BACKUP Order to terminate . You can specify the following parameters to prevent termination , As shown in the following table .

If specified …	that RMAN skip …
SKIP INACCESSIBLE	RMAN Unreadable data files
SKIP OFFLINE	Offline data file . Some offline data files can still be read , Because they are on disk . Others have been deleted or removed and cannot be read , Make them inaccessible .
SKIP READONLY	Read only tablespace data files .

The following example uses an automatic channel to back up a database , Skip all data files that may cause the backup job to terminate .
BACKUP DATABASE
 SKIP INACCESSIBLE
 SKIP READONLY
 SKIP OFFLINE;

source ：《Oracle Database Backup and Recovery User’s Guide,19c》