Created attachment 460849 [details]
screenshot of adding new hardware options

Created attachment 460850 [details]
screenshot error

The plumbing is now upstream, just need to specify a configure option in the spec:

http://hg.fedorahosted.org/hg/virt-manager/rev/acbcecdfa1b9

Fixed in virt-manager-0.8.6-1.el6

checked with FAIED . Please confirm whether the following steps are valid .Since there is no SCSI disk option on virt-manager-0.8.6-2.el6 . There is only the IDE disk option . 

Component version for confirmation 
virt-manager-0.8.6-2.el6.noarch.rpm

Description :
on virt-manager-0.8.6-2.el6.noarch.rpm , there is no scsi disk option for storage device , so add the scsi disk from the guest xml , then tried to start the guest from virt-manager . FAILED , and got the following error messages 

Error starting domain: internal error process exited while connecting to monitor: char device redirected to /dev/pts/1
Using CPU model "cpu64-rhel6"
qemu-kvm: -device lsi,id=scsi0,bus=pci.0,addr=0x7: Parameter 'driver' expects a driver name
Try with argument '?' for a list.


Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 45, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/engine.py", line 956, in asyncfunc
    vm.startup()
  File "/usr/share/virt-manager/virtManager/domain.py", line 1048, in startup
    self._backend.create()
  File "/usr/lib64/python2.6/site-packages/libvirt.py", line 330, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error process exited while connecting to monitor: char device redirected to /dev/pts/1
Using CPU model "cpu64-rhel6"
qemu-kvm: -device lsi,id=scsi0,bus=pci.0,addr=0x7: Parameter 'driver' expects a driver name
Try with argument '?' for a list.


Steps:
1. create a guest named rhel6
2. create lv called storage under /dev/vg_kvm  (vg_kvm is a VG created on SCSI storage)
3. try to add SCSI disk from virt-manager (no SCSI disk option found on this version of virt-manager)
4. try to add the following section into guest xml 

......
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw'/>
      <source dev='/dev/vg_kvm/storage'/>
      <target dev='sda' bus='scsi'/>
      <address type='drive' controller='0' bus='0' unit='0'/>
    </disk>
......
5. try to start guest on virt-manager 

Additional info :
without the scsi disk added , could start the guest successfully . 

Guest xml 
<domain type='kvm'>
  <name>rhel6</name>
  <uuid>875b8f57-afa1-561e-dadb-ec8709c828f3</uuid>
  <memory>524288</memory>
  <currentMemory>524288</currentMemory>
  <vcpu>1</vcpu>
  <os>
    <type arch='x86_64' machine='rhel6.1.0'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw' cache='none'/>
      <source file='/var/lib/libvirt/images/rhel6.img'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </disk>
    <disk type='block' device='cdrom'>
      <driver name='qemu' type='raw'/>
      <target dev='hdc' bus='ide'/>
      <readonly/>
      <address type='drive' controller='0' bus='1' unit='0'/>
    </disk>
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw'/>
      <source dev='/dev/vg_kvm/storage'/>
      <target dev='sda' bus='scsi'/>
      <address type='drive' controller='0' bus='0' unit='0'/>
    </disk>
    <controller type='scsi' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </controller>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <interface type='network'>
      <mac address='52:54:00:2f:8f:18'/>
      <source network='default'/>
      <model type='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <input type='tablet' bus='usb'/>
    <input type='mouse' bus='ps2'/>
    <graphics type='vnc' port='-1' autoport='yes'/>
    <sound model='ac97'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </sound>
    <video>
      <model type='cirrus' vram='9216' heads='1'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </memballoon>
  </devices>
</domain>


# lvcreate -L +10G -n storage /dev/vg_kvm
# lvs
  LV      VG     Attr   LSize  Origin Snap%  Move Log Copy%  Convert
  storage vg_kvm -wi-a- 10.00g

Oops , that should be my fault to set ASSIGNED status again . 
Since the expect result is not to have SCSI disk option available for the end user. So it is the correct result that we didn't see the SCSI disk option on virt-manager . 
And didn't allow the guest started is expected with the SCSI disk added . 

So set the bug status to VERIFIED .

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0637.html