Re: which (pseudo)-device can be used as VBD in xenU ?

[Nuno Silva <nuno.silva@vgertech.com>]

Jérôme Petazzoni wrote:
> I saw examples of VBD using hdXY and sdXY inside virtual machines, like 
> this : disk=phy:hda5,hda1,w
> 
> And I would like to do this : disk=phy:md8,md1,w
> 
> But it failed (the "real" md driver tried to access something that 
> didn't exist, of course, and rootfs couldn't be mounted). Did I do 
> something wrong, or is the frontend driver only able to "fake" hdXY and 
> sdXY devices ?

I guess that you can export _ALL_ the block devices that make your md8 
and create the md *in* the guest.

Exporting a "normal" block device (md8, from the host) is the same as 
exporting another "normal" block device, like sda2.

> FYI, my motivation is to supply mdX devices to ease migration from/to 
> real servers.

IMHO one of the biggest advantages of virtualization is hardware 
independence. You'll loose (part of) that if you create your md inside 
the guest... At least it'll be a pain to mantain...

Regards,
Nuno Silva


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