> But if it's something that only exhibits in writeback mode rather than writethrough, then I'd guess it's to do with the > list of writeback work that the policy builds. So check OP is being coy about the DD command but I saw it mentioned off-hand earlier. dd if=/250GB_file/on_LVM/H800_vdev of=/dev/null It's a pure, streaming read. LVM cache should be doing absolutely nothing. _______________________________________________ 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/
