backup validate tablespace

RMAN> backup validate tablespace system;

Starting backup at 31-MAY-19
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=63 device type=DISK
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00001 name=+DATA/ACME/DATAFILE/system.258.848598015
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:55
List of Datafiles
=================
File Status Marked Corrupt Empty Blocks Blocks Examined High SCN
---- ------ -------------- ------------ --------------- ----------
1    OK     0              17580        99852           1767091 
  File Name: +DATA/ACME/DATAFILE/system.258.848598015
  Block Type Blocks Failing Blocks Processed
  ---------- -------------- ----------------
  Data       0              65092         
  Index      0              13550         
  Other      0              3618           

channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
including current control file in backup set
including current SPFILE in backup set
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:01
List of Control File and SPFILE
===============================
File Type    Status Blocks Failing Blocks Examined
------------ ------ -------------- ---------------
SPFILE       OK     0              2             
Control File OK     0              612           
Finished backup at 31-MAY-19