ORA-00245 control file backup failed target is likely on a local file system

Solution:
This happens when you havea RAC setup and you are backing up the Snapshot of the controlfile to a local disk instead of a shared disk.
In our setup we setup an ACFS file system on both nodes of RAC and changed RMAN parameter as below
RMAN> CONFIGURE SNAPSHOT CONTROLFILE NAME TO ‘/ACFS/snapcf_mw1.f’;
new RMAN configuration parameters:
CONFIGURE SNAPSHOT CONTROLFILE NAME TO ‘/ACFS/snapcf_mw1.f’;
new RMAN configuration parameters are successfully stored

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Article by: Shadab Mohammad