Logical Volume in RAID 1

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http://serverfault.com – I have an existing CentOS 6.2 system with drives having this partition: sda --sda1 - ext4 - /boot --sda2 - physical volume Logical Volume --VolGroup -----lv_root -----lv_home -----lv_swap sdb -free I made RAID1 by using the sdb first. md0 (ext4) and md1 (physical volume). How can I copy the logical volume in sda2 to md1? (HowTos)