RE: [Xen-users] Using diskOnKey as additional disk - is it possible with default configuration?

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

> -----Original Message-----
> From: Ian Brown [mailto:ianbrn@xxxxxxxxx] 
> Sent: 02 April 2007 14:16
> To: Petersson, Mats
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Using diskOnKey as additional disk - 
> is it possible with default configuration?
> 
> Mats,
>   Thanks for your trial; following your mail I tried it with hda; it
> is the same, it does not work -
> "fdisk -l" does not show hda.

Hmm. So you're trying to see a disk as a partition?

'phy:/dev/sdb,sda6,w'

(sdb -> sda6: sdb is a disk, sda6 is "partition six of device sda"). 

I'm not saying this is what's wrong, but as far as I know, the Xen-guest
will not have any clue what type of device it is (hence we can use a
file as a guest-image). So it shouldn't matter if it's a USB-stick,
SCSI-disk or whatever else you can imagine as a "hard-disk". It's most
likely some details, rather than the overall concept, that is causing it
to not work. But there's a whole lot of different permutations, so it
may take a while to figure it out. 

--
Mats
> 
> Regards,
> Ian
> 
> 
> On 4/2/07, Petersson, Mats <Mats.Petersson@xxxxxxx> wrote:
> > > -----Original Message-----
> > > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> > > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf 
> Of Ian Brown
> > > Sent: 02 April 2007 10:57
> > > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > > Subject: [Xen-users] Using diskOnKey as additional disk - is
> > > it possible with default configuration?
> > >
> > > Hello,
> > >  I try the following:
> > > I have in the configDomU file the following:
> > >
> > > disk = [ 'tap:aio:/var/lib/xen/images/guest10/guest10File]
> > >
> > > which works OK; I can start domU by "xm create -c configDomU.
> > >
> > >
> > > Now, my question is: can I add an additional USB DiskOnKey as a
> > > physical device ?
> > > What I tried is:
> > > First I added mknod /dev/sda6 b 8 6 in domU.
> > > Then I added to the configDomU file:
> > > disk = [ 'tap:aio:/var/lib/xen/images/guest10/guest10File,xvda,w'
> > > ,'phy:/dev/sdb,sda6,w' ]
> > >
> > > /dev/sdb is the device of teh USB DiskOnKey and **it is 
> unmounted**.
> > > and start domU.
> > > "fdisk -l" does not show any new device. (I expected to see
> > > /dev/sda6).
> > >   (Of course that the /dev/xvda for guest10File exists)
> > >
> > > When I try to do the following:
> > >
> > >       disk = [
> > > 'tap:aio:/var/lib/xen/images/guest10/guest10File,xvda,w'
> > > ,'phy:/dev/sda7,sda6,w' ]
> > >
> > > where /dev/sda7 is an unmounted partition in dom0, than after
> > > starting domU I am **able** to see with
> > >
> > > "fdisk -l " the /dev/sda6 device.
> > >
> > > Is it something to do with that it can't add additional disk
> > > if it is a USB ?
> > >
> > > Regards,
> > > Ian
> > >
> > I'm by no means an expert on this, but is it by any chance that you
> > shouldn't use "sda" but rather "hda" for the export name? 
> Bear in mind
> > that the guest doesn't actually know (or cares) what 
> PHYSICAL device it
> > is talking to, but it has to hook onto it in some way, and I seem to
> > remember something similar before. Worth a try, I should think.
> >
> > --
> > Mats
> >
> >
> >
> 
> 
> 



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