it's not a good idea, but you could use raid1 without a superblock... did i mention it's not a good idea? normally you want the raid1 superblock... which lives at the end of the partition. you can't blindly convert an LVM pv to a raid1 device without ensuring the physical extent at the end of the pv isn't in use. i don't see any way to shrink a pv -- so i don't think you'll be able to convert an existing lvm pv to a raid1 device. however there's nothing stopping you from creating a raid1 device on a second disk (and specify "missing" for the other raid device(s)... see mdadm man page), creating a pv/vg/lv on top of that raid1, then copying the filesystems over... doing grub/lilo/whatever magic... and trying to boot it. if it works, you can convert the old disk into the second component of the raid. there's probably several docs already explaining this sort of procedure without lvm involved... (for example there's one supplied with debian mdadm at /usr/share/doc/mdadm/rootraiddoc.97.html) -dean _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
