Converting software RAID1 to RAID10 for /boot

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http://serverfault.com – Array info: /dev/md0 -> /dev/sda1 and /dev/sdb1 /dev/md2 -> /dev/sda2 and /dev/sdb2 Partition info: /boot -> /dev/md0 / -> /dev/md1 I have two drives that are setup as RAID1 using software RAID on Redhat. I added two additional drives (same size) and I would like to conver the RAID1 to a RAID10. The problem I'm having is adding the last drive to the array. I've gotten as far as creating a RAID10 with two missing devices but as soon as I add the last drive, all hell breaks loose. It seems /dev/sda1 is the culprit. What I'm not too sure about is how to create the RAID10. I've tried the fo (HowTos)