Re: [Xen-users] how to boot a para-virtulized vm from cdrom after installation

[jun hu <duanshuidao@xxxxxxxxxxx>]

thanks a lot 
I see you now

from hujun's iphone

在 2012-10-9，0:11，"Alexandre Kouznetsov" <alk@xxxxxxxxxx> 写道：

> Hello.
> 
> El 06/10/12 08:38, jun hu escribió:
>> how to boot a para-virtulized vm from cdrom after installation?
> 
> In short, it does not work that way.
> 
> When you decide "where to boot from", it implies there is some piece of code 
> (BIOS, for example) that will look for a bootloader on some device. This is 
> perfectly valid in HVM mode of operation, but not in PV.
> 
> In case of Para-Virtualized DomU, the hypervisor itself loads the kernel, 
> specified in the config file. There is no BIOS or bootloader residing in the 
> MBR of a block device. There is no no such thing as "boot device" or "boot 
> order".
> 
> You can try this:
> 1. Hard way. Set up a new, completely new, HVM DomU. Attach your former PV 
> DomU to it and boot form CD.
> 
> 2. Depends on what you need to achieve over your DomU, it almost certainly 
> possible to be done from Dom0.
> 
> Greetings.
> 
> -- 
> Alexandre Kouznetsov
> 
> 
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