On Tue, 15 Feb 2011 09:19:23 +0000, Stefan Hajnoczi <stefanha@xxxxxxxxx> wrote: > Did you run dd with O_DIRECT? > dd if=/dev/zero of=<path-to-device> oflag=direct bs=64k Using O_DIRECT, performance went down to 11 MB/s on the hypervisor... -- Thomas -- ICQ: 7122237 Jabber: tbr@xxxxxxxxxxxxx Web: www.bassfimass.de -- 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