Excuse me for asking the question again, because my last question has not been answered. I have two scsi hd of same geometry : 36G I want to have sda1 sdb1 map to /boot by raid1 sda2 sdb2 map to / by raid1 Unfortunately, I wrongly formated sda2+sdb2 to raid0, and the error was discovered a few weeks after the server has been put into production. So my problem is how can I use minimum time to convert the raid0 back to radi1 safely? -Jason ps The usage of sda2+sdb2 is less than 10G at the present moment - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html