backing up my macbook pro to external hardrive
I want to backup my macbook pro to an external hard disk using the disk utility. When i try, I get resource busy. I understand I have to boot from cd/dvd and then access the dvd utility to do the backup. I do not have my original boot disk. Is there any way to create a boot disk to do a backup... other suggestions?
macbook pro, Mac OS X (10.4.8)