RMAN> connect target *
2> 
3> 
4> run
5> {
6>     allocate channel dev1 type disk format '<path>\db_t%t_s%s_p%p';
7>     allocate channel dev2 type disk format '<path>\db_t%t_s%s_p%p';
8>     backup database FILESPERSET 20 ;
9>     BACKUP archivelog all ;
10>     delete noprompt archivelog all completed before 'sysdate-1';
11>     release channel dev1 ;    
12>     release channel dev2 ;    
13> }
14> 
connected to target database: <name> (DBID=<No>)

using target database control file instead of recovery catalog
allocated channel: dev1
channel dev1: SID=**** instance=***** device type=DISK

RMAN-06908: WARNING: operation will not run in parallel on the allocated channels
RMAN-06909: WARNING: parallelism require Enterprise Edition
allocated channel: dev2
channel dev2: SID=***** instance=***** device type=DISK

Starting backup at *****
channel dev1: starting full datafile backup set
channel dev1: specifying datafile(s) in backup set
input datafile file number=00003 name=+ASMDATA1/*****/DATAFILE/sysaux.258.889443793
input datafile file number=00001 name=+ASMDATA1/*****/DATAFILE/system.259.889443865
input datafile file number=00005 name=+ASMDATA1/*****/DATAFILE/undotbs1.261.889443941
input datafile file number=00002 name=+ASMDATA1/*****/DATAFILE/undotbs2.266.889444133
input datafile file number=00011 name=+ASMDATA1/*****/DATAFILE/*****_sysconfg.275.890487605
input datafile file number=00006 name=+ASMDATA1/*****/DATAFILE/users.260.889443941
input datafile file number=00013 name=+ASMDATA1/*****/DATAFILE/*****_trans_2
channel dev1: starting piece 1 at 1*****
released channel: dev1
released channel: dev2
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on dev1 channel at 05/10/2016 14:09:46
ORA-19504: failed to create file "*****\DB_T911484584_S924_P1"
ORA-27040: file create error, unable to create file
OSD-04002: unable to open file
O/S-Error: (OS 1392) The file or directory is corrupted and unreadable.

Recovery Manager complete.