One
can backup archived log files using RMAN or any operating system backup
utility.
Remember to delete files after backing them up to prevent archive log
directory from filling up. If the archive log directory becomes full, your
database will hang!
Look
at this simple RMAN backup script
RMAN>
run {
Allocate
channel dev1 type disk;
Backup
Format '/app/oracle/arch_backup/log_t%t_s%s_p%p'
(Archive
log all delete input);
Release
channel dev1;
}