On Thu, Apr 16, 2015 at 9:43 PM, Paolo Bonzini <pbonz...@redhat.com> wrote:
> > > On 16/04/2015 15:25, Peter Teoh wrote: > > > > Now my question is: Is it possible to modify the QEMU source code, or > > pass in the correct parameters in the command line, so as provide direct > > I/O access from the QEMU guest all the way to the underlying host's AHCI > > sata bus (based on my AMD's hardware configuration as above)? > > You can use PCI passthrough and let the guest use the whole SATA bus, if > you have another way to access other disks on the same bus (e.g. boot > from a USB stick or access the filesystems on NFS). > > Or you can use SCSI passthrough and pass the /dev/sdX device to the > guest, e.g. > > -device virtio-scsi-pci > -drive if=none,file=/dev/sdb,id=sdb,cache=none,format=raw > -device scsi-block,drive=sdb > > The guest then will talk to the host's ATA->SCSI translation layer, and > will be able to send raw ATA commands via the ATA PASSTHROUGH command. > > Paolo > Thank you very much, that answer saved me many hours of search/trial and errors. And seems to work for now...need more testing. Thanks again Paolo :-). -- Regards, Peter Teoh
