BACKUP AS COPY DATAFILE +ASM

RMAN> backup as copy datafile '+DATA/ACME/DATAFILE/example.266.848598231';

Starting backup at 17-APR-20
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=+DATA/ACME/DATAFILE/example.266.848598231
output file name=+FRA/ACME/DATAFILE/example.306.1037994741 tag=TAG20200417T195220 RECID=11 STAMP=1037994759
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:25
Finished backup at 17-APR-20

Starting Control File and SPFILE Autobackup at 17-APR-20
piece handle=+FRA/ACME/AUTOBACKUP/2020_04_17/s_1037994766.305.1037994767 comment=NONE
Finished Control File and SPFILE Autobackup at 17-APR-20

RMAN>