Il 17/10/2012 23:20, Mario Giammarco ha scritto:
> Hello,
> I hope I am in the right list.
> I would like to pass a real disk to a guest (freenas) in kvm/qemu without
> iommu/vt-d.
>
> I need guest to be able to:
>
> - use hdd smart;
> - configure hdd params like power saving;
> - understand real make and model of hdd;
> - understand when the hdd is an ssd.
This is really a libvirt question more than QEMU... anyway if your guest
is new enough (Linux 3.4 or RHEL/CentOS 6.3) you can probably use
virtio-scsi with XML that looks like this (using "virsh edit"):
<controller type='scsi' model='virtio-scsi'/>
<disk type='block' device='lun'>
<driver name='qemu' type='raw' cache='none'/>
<source dev='/dev/sdb'/>
<target dev='sda' bus='scsi'/>
</disk>
For passthrough you need the "device='lun'" setting.
You can also use virsh from the command line to achieve the same.
Write the <controller> and <disk> elements to a new file, like hba.xml
and sdb.xml. Then:
# virsh attach-device --persistent Guest1 ~/hba.xml
# virsh attach-device --persistent Guest1 ~/sdb.xml
virt-manager and virt-install don't yet fully support virtio-scsi.
Paolo
