Comment 3 for bug 583296

Hi,

I tried this with qemu-img version 1.0, Ubuntu 12.04 host and gentoo guest, with qcow2 disk image.
This seems to work fine. Perhaps it was fixed in the new qemu-img versions.

shehbaz@BLAckArrOw:~$sudo dd if=/dev/nbd0 of=/dev/null bs=1M
8192+0 records in
8192+0 records out
8589934592 bytes (8.6 GB) copied, 185.003 s, 46.4 MB/s
shehbaz@BLAckArrOw:~$

Did you try working with some other disk image? Did this issue get resolved already? Perhaps more information will be required to debug this now.