There's lots of short explanations, and unless you are going to write some software there's really not that much to it. Read about mdadm and you will have it in a nutshell. http://www.linuxdevcenter.com/pub/a/linux/2002/12/05/RAID.html http://www.faqs.org/docs/Linux-HOWTO/ATA-RAID-HOWTO.html http://willert.dk/geek/raid.html Chris Mason US Number: (646)722-0001 US Fax (815)301-9759 Skype: netconcepts