RMAN > #Allocation all channel
replace script allocate_channel {
allocate channel d11 type disk;
allocate channel d12 type disk;
allocate channel d13 type disk;
} 

replaced script allocate_channel

RMAN > # Releases all channels
replace script release_channel {
release channel d11;
release channel d12;
release channel d13;
}

replaced script release_channel

RMAN > # Backs up the control file
replace script backup_controlfile {
execute script allocate_channel;
backup
format '/home/wbrman/backup/rman_CTL__%d.%U.bak'
(current controlfile);
execute script release_channel;
}

replaced script backup_controlfile

RMAN > # Back up the archived log files, and deletes them once the backup has successfully completed.
replace script backup_archivelog {
sql 'alter system archive log current';
execute script allocate_channel;
backup
filesperset 10
format '/home/wbrman/backup/rman_ARC__%d.%U.bak'
(archivelog all delete input);
execute script release_channel;
}

replaced script backup_archivelog

RMAN> # Backs up the whole database. The database must be mounted and opened.
replace script backup_datafile {
execute script allocate_channel;
backup full tag backup_db filesperset 4
format '/home/wbrman/backup/rman_DF_%d.%U.bak'
(database);
execute script release_channel;
}

replaced script backup_datafile

RMAN> #Full Backup
replace script backup_fulldb {
execute script backup_controlfile;
execute script backup_datafile;
execute script backup_archivelog;
}

replaced script backup_fulldb

RMAN> show all;

RMAN configuration parameters for database with db_unique_name WBDATA are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 1; # default
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO DISK; # default
CONFIGURE CONTROLFILE AUTOBACKUP OFF; # default
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO '%F'; # default
CONFIGURE DEVICE TYPE DISK PARALLELISM 1 BACKUP TYPE TO BACKUPSET; # default
CONFIGURE DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
CONFIGURE ARCHIVELOG BACKUP COPIES FOR DEVICE TYPE DISK TO 1; # default
[b]CONFIGURE CHANNEL DEVICE TYPE DISK MAXPIECESIZE 2 G;[/b]
CONFIGURE MAXSETSIZE TO UNLIMITED; # default
CONFIGURE ENCRYPTION FOR DATABASE OFF; # default
CONFIGURE ENCRYPTION ALGORITHM 'AES128'; # default
CONFIGURE COMPRESSION ALGORITHM 'BASIC' AS OF RELEASE 'DEFAULT' OPTIMIZE FOR LOAD TRUE ; # default
CONFIGURE ARCHIVELOG DELETION POLICY TO NONE; # default
CONFIGURE SNAPSHOT CONTROLFILE NAME TO '/ora11gsoft/odb/OH1/dbs/snapcf_wbdata.f'; # default

[oracle1@WBH-DB1 backup]$ ll -ltrh
total 5.9G
-rw-r----- 1 oracle1 oinstall 9.3M Dec 18 11:43 rman_CTL__WBDATA.1flvs4ee_1_1.ba
k
-rw-r----- 1 oracle1 oinstall 803M Dec 18 11:45 rman_DF_WBDATA.1hlvs4ei_1_1.bak
-rw-r----- 1 oracle1 oinstall 9.3M Dec 18 11:45 rman_DF_WBDATA.1jlvs4iq_1_1.bak
-rw-r----- 1 oracle1 oinstall 2.6G Dec 18 11:46 rman_DF_WBDATA.1glvs4ei_1_1.bak
-rw-r----- 1 oracle1 oinstall 2.6G Dec 18 11:47 rman_DF_WBDATA.1ilvs4ei_1_1.bak
-rw-r----- 1 oracle1 oinstall  15M Dec 18 11:47 rman_ARC__WBDATA.1klvs4ma_1_1.bak
-rw-r----- 1 oracle1 oinstall 2.5K Dec 18 11:47 rman_ARC__WBDATA.1llvs4ma_1_1.bak

RMAN> replace script allocate_channel {
allocate channel d11 type disk maxpiecesize 2g;
allocate channel d12 type disk maxpiecesize 2g;
allocate channel d13 type disk maxpiecesize 2g;
} 
starting full resync of recovery catalog
full resync complete
replaced script allocate_channel

[oracle1@WBH-DB1 backup]$ ll -ltrh
[b]total 5.9G[/b]
-rw-r----- 1 oracle1 oinstall 9.3M Dec 18 13:49 rman_CTL__WBDATA.1mlvsbrk_1_1.bak
-rw-r----- 1 oracle1 oinstall 804M Dec 18 13:50 rman_DF_WBDATA.1olvsbro_1_1.bak
-rw-r----- 1 oracle1 oinstall 9.3M Dec 18 13:51 rman_DF_WBDATA.1qlvsbug_1_1.bak
-rw-r----- 1 oracle1 oinstall 2.0G Dec 18 13:52 rman_DF_WBDATA.1nlvsbro_1_1.bak
-rw-r----- 1 oracle1 oinstall 2.0G Dec 18 13:52 rman_DF_WBDATA.1plvsbro_1_1.bak
-rw-r----- 1 oracle1 oinstall 535M Dec 18 13:52 rman_DF_WBDATA.1nlvsbro_2_1.bak
-rw-r----- 1 oracle1 oinstall 553M Dec 18 13:52 rman_DF_WBDATA.1plvsbro_2_1.bak
-rw-r----- 1 oracle1 oinstall  94K Dec 18 13:53 rman_ARC__WBDATA.1rlvsc27_1_1.bak
-rw-r----- 1 oracle1 oinstall 2.5K Dec 18 13:53 rman_ARC__WBDATA.1tlvsc28_1_1.bak
-rw-r----- 1 oracle1 oinstall 2.8M Dec 18 13:53 rman_ARC__WBDATA.1slvsc27_1_1.bak

[oracle1@WBH-DB1 data]$ ll -ltrh 
total 8.6G
-rw-r----- 1 oracle1 oinstall  11M Dec  7 22:02 tea_temp01.dbf
-rw-r----- 1 oracle1 oinstall  11M Dec  7 22:03 inventory_temp01.dbf
-rw-r----- 1 oracle1 oinstall  11M Dec  7 22:03 production_temp01.dbf
-rw-r----- 1 oracle1 oinstall  11M Dec  7 22:03 office_temp01.dbf
-rw-r----- 1 oracle1 oinstall  11M Dec 18 10:20 temp01.DBF
-rw-r----- 1 oracle1 oinstall 101M Dec 18 13:53 redo03a.log
-rw-r----- 1 oracle1 oinstall 101M Dec 18 13:53 redo01a.log
-rw-r----- 1 oracle1 oinstall 530M Dec 18 13:53 tea_index01.dbf
-rw-r----- 1 oracle1 oinstall 1.5G Dec 18 13:53 tea_data01.dbf
-rw-r----- 1 oracle1 oinstall 203M Dec 18 13:53 system01.dbf
-rw-r----- 1 oracle1 oinstall 595M Dec 18 13:53 production_index01.dbf
-rw-r----- 1 oracle1 oinstall 1.3G Dec 18 13:53 production_data01.dbf
-rw-r----- 1 oracle1 oinstall 122M Dec 18 13:53 office_index01.dbf
-rw-r----- 1 oracle1 oinstall 203M Dec 18 13:53 office_data01.dbf
-rw-r----- 1 oracle1 oinstall 574M Dec 18 13:53 inventory_index01.dbf
-rw-r----- 1 oracle1 oinstall 734M Dec 18 13:53 inventory_data01.dbf
-rw-r----- 1 oracle1 oinstall 791M Dec 18 13:53 history01.dbf
-rw-r----- 1 oracle1 oinstall  93M Dec 18 13:59 sysaux01.dbf
-rw-r----- 1 oracle1 oinstall 1.9G Dec 18 14:04 undotbs01.dbf
-rw-r----- 1 oracle1 oinstall 101M Dec 18 14:04 redo02a.log
-rw-r----- 1 oracle1 oinstall 9.3M Dec 18 14:04 control01.ctl