On Wed, Sep 16, 2009 at 10:22 PM, Ambrogio De Lorenzo
The good and most secure way is to mirror disks. In this way all blocks
are replicated, all I/O are replicated and disks are syncronized when I
shutdown the OS.
You could use DRBD, then you would have a block to block copy on a
linux-lvm mailing list
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/