On Wed, Aug 14, 2013 at 07:29:53AM -0400, Spensky, Chad - 0559 - MITLL wrote: > We are trying to keep an active shadow copy while the system is running > without any need for pausing. More precisely we want to log every > individual access to the drive into a database so that the entire stream > of accesses could be replayed at a later time. CCing Wolfgang Richter who was previously interested in block I/O tracing: https://lists.nongnu.org/archive/html/qemu-devel/2013-05/msg01725.html Stefan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html