mdadm -C /dev/md0 --level=5 --raid-device=3 /dev/hda5 /dev/hda6 /dev/hda7
mkfs -t ext3 /dev/md0
pvcreate /dev/md0
vgcreate my-lvm-raid /dev/md0
lvcreate -L -500M -n my-lvm-raid-lv0 /dev/my-lvm-raid
mkfs -t ext3 /dev/my-lvm-raid/my-lvm-raid-lv0
mount /dev/my-lvm-raid/my-lvm-raid-lv0 /mnt
NB:- tested on Centos 5.3
see:- http://wiki.tldp.org/LVM-ON-RAID
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