[Xen-users] HVM, USB devices and qemu monitor

[Marianne Spiller <devnull@xxxxxxxxxxxxx>]

Hi there,

I have a clean system with the following configuration:

Dell PowerEdge 2970, 2x Quad-Core AMD Opteron(tm) Processor 2352
Debian-4.0 (stable) amd_64
Xen-3.3.0 (compiled from source, gcc-4.1.2)

System is up and running, and I have three guest domains (HVM);  
everything works fine.
Now we have to USB harddisks for backup purposes; one is connected,  
the other outside company, so we have to replace the USB device every  
week. Of course, we can't reboot this backup VM every week ;) So I try  
to connect this USB device to my domU.
Working with 'xm block-attach' does not seem to have any effort - I  
can export my device on dom0, but can't mount it on domU, domU doesn't  
even seem to 'see' it. So I tried another way described here [1],  
disabled VNC, enabled SDL and monitor=1.
Domain still boots, but in case of 'export DISPLAY="..."' extremly  
slow; then I had a keymap problem ('enter' was 'J' in this case, but  
this was a MacOS X X11.app issue and enabling 'Follow system keyboard  
layout' solved it), now I can login via SDL window.
But Ctrl+Alt+2 does not have any effect; I tried several things, but  
no success. Process is running with 'monitor' enabled [2] it seems,  
but how to get into? When I press Ctrl+Alt+2 keystroke, I get
Warning: no scancode found for keysym 310
Warning: no scancode found for keysym 310

in my qemu-dm-galaxy.log. I tried to modify via xmodmap, but no  
success. I was looking for a possibility to define an alternative  
keystroke, but no success. Can anyone please give me a hint? Or is  
there any other way to make my USB harddisks accessible from within my  
backup domU?
Many thanks in advance,
--ms



[1]  
http://www.virtuatopia.com/index.php/Adding_USB_Devices_to_a_Xen_HVM_domainU_Guest
[2] /usr/lib/xen/bin/qemu-dm -d 13 -domain-name galaxy -k en-us  
-monitor vc -vcpus 2 -append ip=:127.0.255.255::::eth0:dhcp  -boot c  
-acpi -net nic,vlan=1,macaddr=00:02:02:c0:ff:ee,model=rtl8139 -net  
tap,vlan=1,ifname=tap13.0,bridge=xenbr0 -M xenfv


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