A snapshot controlfile is a read consistent copy of a database controlfile which RMAN creates because the controlfile is changed constantly. The snapshot controlfile must be on a location shared by all RAC nodes in a cluster and it must be accessable by all nodes on which instances for an RAC database can run otherwise ORA-00245: control file backup operation failed when running an RMAN backup.
Solution:
CONFIGURE SNAPSHOT CONTROLFILE NAME TO ‘shared snapshot controlfile’;
To check current setting for the snapshot control file.
SNAPSHOT CONTROLFILE NAME
Reference documents My Oracle Support:
1263621.1,
1268725.1
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