RE: [Xen-users] Effect of installing Xen on VT enabled machine

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: Praveen Kushwaha [mailto:praveen.kushwaha@xxxxxxxxxxx] 
> Sent: 07 March 2007 11:30
> To: Petersson, Mats; xen-users@xxxxxxxxxxxxxxxxxxx; 
> xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] Effect of installing Xen on VT 
> enabled machine
> 
> 
> 
> Hi mat,
>             Thanks a lot again for such a prompt reply.
>             Basically my problem is that. I have a VT enabled 
> machine in
> which windows is installed in s different partition. Now I install xen
> in different partiton (first linux and then xen). Now I want 
> to run that
> already installed windows in domu on xen. According to you hardware is
> changed for windows now so it will be difficult to run. 
> Then what other method is 
> 
> 1. First create an image of installed windows

No, you should install Windows AGAIN, this time in the Virtual machine. 

> 2. Now install xen on machine (first linux then xen)

This is the FIRST step. 

> 3. Now create domU for windows using the image file(Give the 
> path image
> file which is on disk in creation of domu).

That sounds right. And by the way, if you wish to pass the original
Windows installation as a physical disk to your Windows domU, you can do
that too, and it can then be used as to store files - you just don't
start the Windows installation that is on there. If you do things right,
you can probably run  most applications you have on the already existing
installation too - but some applications become unhappy when you change
the environment around them, so may not work [also, apps that install
.DLL's into the Windows directory will need to have the relevant DLL's
re-installed on your Guest installatin]. 

--
Mats
> 
> Is this process right for runing the already operational windows as
> domu.
> Please confirm me. Is there any other method for running already
> operational windows as domu on xen. If there is please let me know.
> Basically I have to run already operational window on xen.
> 
> Thanks,
> Praveen Kushwaha       
> 
> -----Original Message-----
> From: Petersson, Mats [mailto:Mats.Petersson@xxxxxxx] 
> Sent: Wednesday, March 07, 2007 4:10 PM
> To: Praveen Kushwaha; xen-users@xxxxxxxxxxxxxxxxxxx;
> xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] Effect of installing Xen on VT 
> enabled machine
> 
>  
> 
> > -----Original Message-----
> > From: Praveen Kushwaha [mailto:praveen.kushwaha@xxxxxxxxxxx] 
> > Sent: 07 March 2007 10:28
> > To: Petersson, Mats; xen-users@xxxxxxxxxxxxxxxxxxx; 
> > xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: RE: [Xen-users] Effect of installing Xen on VT 
> > enabled machine
> > 
> > Hi mat,
> >               Thanks a lot for the reply. 
> >               But I have one more confusion. Suppose in my 
> > machine there
> > is more than one partition. In one partition windows is 
> > installed. Now I
> > want to install xen on it, I will install linux on 
> different partition
> > and then will install xen in it(on linux). In that case, 
> will there be
> > any effect on the windows which is in different partition. If 
> > there will
> > be any effect, then to run that windows as a domu, will we have to
> > install it again?
> 
> There will not be any effect on the Windows that is already 
> installed as
> such - but running that as a guest within Xen will possibly cause
> problems (I think there's a feature called "Hardware profiles" in
> Windows that COULD be used to fix the fact that the hardware 
> "appears to
> change completely", but I'm not at all confident that Windows will
> actually cope with this) 
> 
> It's notoriously difficult to take a hard-disk with (any 
> modern versions
> of) Windows and move it to another machine without re-installing
> Windows. Running Windows as a guest in a virtual machine is 
> essentially
> the same as moving the hard-disk, because ALL of the hardware will be
> different - chipset, hard-disk interface, network, graphics,
> usb-devices, etc, etc. 
> 
> So I suggest that you install another copy of Windows using Xen (then
> Windows will detect the correct devices). If you install on a physical
> partition, then Windows running on the hardware could be used 
> to access
> the same data as the virtual machine, so your documents can 
> be accessed
> from both the virtual and the real windows setups. 
> 
> --
> Mats
> > Please give me your ideas.      
> > 
> > Thanks,
> > Praveen Kushwaha
> > 
> > -----Original Message-----
> > From: Petersson, Mats [mailto:Mats.Petersson@xxxxxxx] 
> > Sent: Wednesday, March 07, 2007 3:15 PM
> > To: Praveen Kushwaha; xen-users@xxxxxxxxxxxxxxxxxxx;
> > xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: RE: [Xen-users] Effect of installing Xen on VT 
> > enabled machine
> > 
> > > -----Original Message-----
> > > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> > > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> > > Praveen Kushwaha
> > > Sent: 06 March 2007 12:07
> > > To: xen-users@xxxxxxxxxxxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxx
> > > Subject: [Xen-users] Effect of installing Xen on VT 
> enabled machine
> > > 
> > > Hi,
> > > 
> > >  
> > > 
> > >            I have a  VT enabled machine on which windows xp 
> > > has been installed. Now I want to install xen on this VT 
> > > enabled machine on which windows xp is already. 
> > > 
> > >            Is there will be any effect on windows xp after 
> > > installing xen on it. If there will be any effect what will 
> > > be those. If anyone will have any information please reply, 
> > > it will be grate for me.
> > 
> > Well, you won't (successfully) be able to "install Xen on Windows". 
> > 
> > If you want to convert your machine to running Xen, you'll 
> > have to also
> > install Linux, which will be your "host operating system".
> > 
> > So let's presume that you have a free drive to install Linux 
> > on and you
> > do this, you will then have to set Linux to be your primary 
> > boot, instal
> > Xen on it (which is relatively easy if you go with one of 
> the Linux's
> > that have Xen included from the beginning). 
> > 
> > Now you have Xen + Linux on the machine - and you could, in theory,
> > start your Windows as a virtual machine (aka guest or DomU) on that
> > machine. However, the hardwar that Windows sees will be 
> different from
> > what the real hardware is, so drivers for hard-disk, network, 
> > graphics,
> > sound etc, would have to be re-installed. It's very likely that the
> > Windows you have on the machine at the moment would not 
> boot with the
> > "new hardware". 
> > 
> > It's probably better to leave the machine in a dual-boot 
> > mode, where you
> > have Linux and Windows installed in parallel, and then 
> install Windows
> > AGAIN for use with Xen. That way, you don't get any 
> hardware problems.
> > The best way to do this would be to use a physical device 
> > (partition) as
> > your Windows install destination. That way, you could let 
> your regular
> > "hardware" windows installation share documents by also 
> mounting this
> > same partition. 
> > 
> > --
> > Mats
> > > 
> > >  
> > > 
> > >    
> > > 
> > > Thanks,
> > > 
> > > Praveen Kushwaha
> > > 
> > > 
> > 
> > 
> > 
> > 
> > 
> 
> 
> 
> 
> 



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