RE: [Xen-users] HVM XVDA or HDA ?

[Nicolas Vilz <niv@xxxxxxxxxx>]

On Thu, 8 Sep 2011, Ian Tobin wrote:

> Hi,
>
> Sorry im not quite following.  I have just set xvda in my file config
> and windows boots ok.  I read in another post that using xvda with pv
> drivers offers performance increase?
>
> When you say bios emulation, do you mean the hvm loader bios?
Yes i was refering to the bios emulation. But I never ran win2008 with xen. 
so my own experience doesnt affect you at all, i think.
Sorry to bother you.

Sincerly
Nicolas

> Thanks
>
> Ian
>
>
> -----Original Message-----
> From: Nicolas Vilz [mailto:niv@xxxxxxxxxx]
> Sent: 08 September 2011 18:22
> To: Ian Tobin
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] HVM XVDA or HDA ?
>
> On Wed, 7 Sep 2011, Ian Tobin wrote:
>
> > Hi,
> >
> >
> >
> > Im trying to get my head round the use of XVDA in the domU config
> files.
> > Should we be using that or continue to use hda? Is there any
> performance increase in using XVDA?
> > We have a few Windows 2008 HVMs so should we switch the the new disk
> config?  We are using LVM and file based images by the way.
>
> You will need hda for hvm on dom0 side for the bios emulation. In later
> kernels on domU side (2.6.38+) you will need hda on dom0 side (in
> xmconfig.cfg) and xvda on domU side (in fstab) or simply uuids to get
> along.
>
> That doesnt affect your win2008 HVMs, of course, but as i said, you will
> need hda for bios emulation.
>
> Sincerly
> Nicolas
>
>
>
>
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