Hi, I've made this twice. I followed this guide (http://unthought.net/Software-RAID.HOWTO/Software-RAID.HOWTO.html#toc1), but it didn't worked for you ... http://slacksite.com/slackware/raid.html you can try this even if you are not on slackware. And a question: Did you install linux on the second disk first? Should be that way. The second disk partitions should be "Linux" not "fd" (the first disk partitions are "fd"). Install on second. And then rebuild first disk. Then make second disk partitions "fd". Another question: did you support RAID in kernel (this shouldn't be as modules). Thats for now, Greetings - : send the line "unsubscribe linux-admin" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html