duplex rman backup on 2 tape libraries simultaneously

Hi,

I have 2 tape libraries and I've been getting backup on each of them seprately

this is my backup script on each of them.

tape library 1:

run{

Allocate channel c01 device type 'SBT_TAPE';

send 'NB_ORA_SERV=mstr-nbkp-srv, NB_ORA_POLICY=DMS-DD-PH-ORA-L0-dms-db1, NB_ORA_SCHED=monthly';

backup incremental level 0 database;

}

run

{

Allocate channel c1 device type 'SBT_TAPE';

send 'NB_ORA_SERV=mstr-nbkp-srv, NB_ORA_POLICY=DMS-DD-PH-ORA-ARC-dms-db1, NB_ORA_SCHED=monthly';

backup archivelog all;

}

tape library 2:

run{

Allocate channel c01 device type 'SBT_TAPE';

send 'NB_ORA_SERV=mstr-nbkp-srv, NB_ORA_POLICY=DMS-