If you have an ASM database instance in NFS environment, mounting of ASM log backups as part of recovery operation might fail if the appropriate ASM disk path is not defined in the asm_diskstring parameter.
ASM-00015: Mounting of ASM Disk Group <ASM_DISKGROUP_NAME> failed: ORACLE-10003: Error executing SQL "ALTER DISKGROUP <ASM_DISKGROUP_NAME> MOUNT RESTRICTED" against Oracle database +ASM: ORA-15032: not all alterations performed ORA-15017: diskgroup "<ASM_DISKGROUP_NAME>" cannot be mounted ORA-15040: diskgroup is incomplete
You should add the ASM disk path /var/opt/snapcenter/scu/clones/*/* to the existing path defined in the asm_diskstring parameter.