If some older man pages are to be believed there once was a capability to keep a heat map of busy extents. Is there a way to revive that capability? I expect "last I/O within 30 seconds, 5 minute, 15minute" is probably sufficient for most uses as well as summary counters along the same lines. _______________________________________________ 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/