Il 07/01/2014 21:27, Richard W.M. Jones ha scritto: > Not much more what I said in the original email (especially see the > attached script which you can download from the bottom of this page: > https://lists.gnu.org/archive/html/qemu-devel/2014-01/msg00084.html ) > > Basically it tries to dd /dev/zero into the virtio-scsi device exposed > by qemu, then calls sg_unmap (there are two devices, it only unmaps > the first so we can hopefully see the difference), but it doesn't seem > to have any effect on the underlying file. The underlying file is a > regular raw-format file on ext4. > > I called sg_readcap/sg_vpd and we seem to have all the right > capability bits exposed. > > This script won't work with regular libguestfs. I compiled a special > appliance that had the sg tools included.
Try again with the pull request of http://permalink.gmane.org/gmane.comp.emulators.qemu/248421 Paolo
