RMAN> validate tablespace corrupt;

Starting validate at 20-MAY-17
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=98 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of validate command at 05/20/2017 11:27:36
RMAN-20202: Tablespace not found in the recovery catalog
RMAN-06019: could not translate tablespace name "CORRUPT"

RMAN> backup check logical datafile 2;

Starting backup at 20-MAY-17
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00002 name=N:\ORADATA\DEV\SYSAUX01.DBF
channel ORA_DISK_1: starting piece 1 at 20-MAY-17
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 05/20/2017 11:28:07
ORA-19504: failed to create file "B:\ORACLE_DATA\ORI-1\BACKUP\TESTER"
ORA-27040: file create error, unable to create file
OSD-04002: unable to open file
O/S-Error: (OS 3) The system cannot find the path specified.

RMAN>