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Re: [Xen-users] Xen 4.2 + XP x64 + PVGPL 2K3 x64 = BSOD (UNMOUNTABLE_BOOT_VOLUME)

On 05/19/2013 06:14 PM, Andrew Bobulsky wrote:
On May 19, 2013, at 5:10 AM, Gordan Bobic <gordan@xxxxxxxxxx> wrote:

The subject says it all, really.

I couldn't find any XP x64 specific drivers, but in all other cases 2K3 x64 
drivers have worked for me on XP x64, so since the kernels and driver models 
are the same, I am guessing this should work.

Thankfully I took a snapshot of the block device before installing the drivers.

Is there a better driver to use on XP x64?

The HVM disk performance is really quite attrocious. From dom0, I get about 
60MB/s on unbuffered reads with dd iflag=direct and hdparm -t. From domU I get 
5MB/s and qemu-dm hits 100% CPU usage.

Is there a way to make this work

Always!  I'm just not sure how :P

establish why it doesn't work?

If you could get the system booted from a completely different storage
device, and then try to get GPLPV working on a volume that's not the
boot volume, that might be a good place to start.  Personally, due to
either my brand of weirdness or perhaps tunnel vision, I would boot
from an iSCSI volume and then attempt to interact with the "local"
disks that way.

Funny you should mention iSCSI. My setup is an iSCSI volume exposed to the domU "raw" as a physical IDE disk. But domU seems to be alergic to it. If I leave the disk spec in the domU config as hda, it BSODs with the mentioned error. If I change it in the config to xvda, the domU starts to burn through 100% of CPU on all cores given to it and never finishes booting.

Alternatively, the only other method is probably to hook up the kernel
debugger and interrogate things from there.  :P

Nothing ever "just works", does it...


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