Hello Xen-users: I've got a Xen system with multiple running (production) VMs, using the xm toolstack on Debian Squeeze. I'm noticing a large amount of disk I/O via dstat, and I'm trying to see which Xen DomU block device is generating the load. xentop offers a bit of information on reads/writes, but it's on a per-domain level, not a per-block-device level. The block devices in question are logical volumes. Is there a way to see a breakdown of the disk I/O per device, or a set of virtual block devices that I could pass to dstat?