During the restore of databases, where the backup is located on a NFS mount, the error rman-03009 ora-19504 ora-17502 may occur.
RMAN-03009: failure of Control File and SPFILE Autobackup command on D1 channel at 08/22/2023 18:42:36 ORA-19504: failed to create file "/mnt/backup/.../c-1923627618-20230822-01" ORA-17502: ksfdcre:9 Failed to create file /mnt/backup/.../c-1923627618-20230822-01
The error is misleading. There is no issue with the directory.
This is a dNFS bug. As a workound, disable dNFS all on all db nodes:
cd $ORACLE_HOME/rdbms/lib make -f ins_rdbms.mk dnfs_off