Klaus Schmidinger wrote:
> JHJE (Jan Holst Jensen) wrote:
>>> JHJE (Jan Holst Jensen) wrote:
>>>>> I was able to obtain the xswindrivers.iso file that way and install
>>>>> it into my virtual Windows XP machine. Unfortunately, when
>>> trying to
>>>>> reboot Windows immediately complained that it could not read from
>>>>> the hard disk, even though I did change the 'vif' and 'disk' config
>>>>> lines to
>>>>>
>>>>> vif = [ 'mac=00:16:3e:00:00:66, bridge=xenbr0' ]
>>>>> disk = [ 'file:/Data/xen/bat-xp.img,hda,w' ]
>>>> I think the PV drivers are SCSI-only, so I guess your disk
>>> must be "sda"
>>>> instead. If you started out by installing Windows on a
>>> virtual IDE drive
>>>> you may be hosed :-/.
>>> So I guess this means I should have installed Windows XP in a virtual
>>> SCSI drive. Ok, I changed my 'disk' line to
>>>
>>> disk = [ 'file:/Data/xen/bat-xp-scsi.img,ioemu:sda,w',
>>> 'file:/Data/iso/windows-xp.iso,hdc:cdrom,r' ]
>>>
>>> and started the virtual machine on an empty bat-xp-scsi.img file.
>>> The Windows setup comes up, but complains that there is no hard
>>> disk installed in my computer.
>>> Is there anything else I need to configure to have Windows see
>>> an SCSI drive?
>> Hmmm.... This is interesting. The XenExpress help says:
>>
>> "The current version of XenServer supports no more than 3 virtual disks
>> (Disk0-Disk2) for unmodified Windows Xen Virtual Machines. The virtual
>> disks appear to the Windows XenVM as SCSI devices if the paravirualized
>> drivers have been installed, or as IDE devices if the paravirualized
>> drivers have not been installed."
>>
>> and when I look in the Xen config for my Windows VM, the LVM partition
>> is exported as "hda", yet when Windows is booted (with PV drivers) it
>> reports that the C: drive is a Xen PV SCSI drive. Fascinating. I did not
>> look at what Windows thought the hardware was before installing the PV
>> drivers.
>>
>> Can you boot the VM that you installed the PV drivers into if you change
>> the disk spec to be
>>
>> disk = [ 'file:/Data/xen/bat-xp-scsi.img,sda,w', ...
>
> I tried both
>
> disk = [ 'file:/Data/xen/bat-xp-scsi.img,hda,w' ]
>
> and
>
> disk = [ 'file:/Data/xen/bat-xp-scsi.img,sda,w' ]
>
> but neither of them worked. With 'hda' Windows brought up the boot
> manager, and when I selected the PV variant it said "Could not read
> from the selected boot disk".
> With 'sda' it didn't even get to the Windows boot manager. The BIOS
> already said "Boot from Hard Disk 0 failed".
>
>> ? I removed "ioemu", since the PV driver will bypass the ioemu layer -
>> as far as I understand it. Sorry that I can't be more specific, but I
>> have only started using HVM this week so I am learning as well :-).
>
> Same here ;-)
Does anybody have an idea why my Windows XP guest doesn't boot with
the PV drivers installed, even if I change "hda" to "sda" in the "file"
statement?
Actually I wouldn't even need the PV driver for disk access, because
that is working just fine. All I need is better network performance,
so the PV driver for the network adapter would suffice. Is there a
way to install just the PV network driver, without the disk driver?
Klaus
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