$rman target /

 run{

allocate channel t1 type disk;
allocate channel t2 type disk;
allocate channel t3 type disk;
backup incremental level 0 format 'e:\orabak\full_%U' database include current controlfile;
backup format 'e:\orabak\arch_full_%U' archivelog all delete input; 
release channel t1;
release channel t2;
release channel t3;
}