Re: [Xen-users] HVM DomU boot failure with scsi disk

[Alexandre Kouznetsov <alk@xxxxxxxxxx>]

Hello.

On 19/03/12 04:51, tangming wrote:
> When I changed the disk type from "sda" to "hda", everthing works well. But I 
> need the DomU
> booting via sda mode because of the business demand.
Historically, Xen HVM can't emulate SCSI. Quote from 
http://ian.blenke.com/xen/hvm/svm/vtx/qemu (quite old, btw, 2006):
"HVM hardware is emulated via a patched QEMU "device manager" (qemu-dm) 
daemon running as a backend in dom0. There is no SCSI emulation, only 
PIIX3 IDE (with some rudimentary PIIX4 capabilities), Cirrus Logic or 
vanilla VGA emulated video, RTL8139 or NE2000 network emulation, PAE, 
and somewhat limited ACPI and APIC support. Basically the same devices 
available in QEMU 0.8.2 today (with a number of patches for performance, 
etc)."
There are references of presenting the drive to HVM guest as "sda" and 
even "xvda", but i have never done that:
http://wiki.xen.org/wiki/Using_Xen_PV_Drivers_on_HVM_Guest

Can you see in your /var/log/xen/qemu-dm-*.log any complain about the 
drive naming?
What is that "business demand"? Maybe it's solvable in some different 
manner?
--
Alexandre Kouznetsov

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