On two local guests on a rawhide box: Device-backed guest (LVM on fast SATA disk): dom0 hdparm -t: 53.70 MB/sec domU hdparm -t: 53.61 MB/sec File-backed guest: dom0 hdparm -t: 85.7138 MB/sec domU hdparm -t: 75.2901 MB/sec
I guess "hdparm -t" is not very significative, but anyways: dom0: hdparm -t: 149.17 MB/sec domU: hdparm -t: 97..07 MB/sec However, real performance is somewhat lower, at about 70MB/s for dom0 and about 33MB/s
